Author name code: kurochka
ADS astronomy entries on 2022-09-14
author:"Kurochka, L.N." 
------------------------------------------------------------------------  

Title: Non-Gaussian Doppler profiles of spectral lines at the
    maxwellian velocity distribution
Authors: Kurochka, L. N.; Loboda, V. I.
Bibcode: 2001KFNT...17..478K
Altcode:
  The case of the non-Gaussian Doppler profiles of spactral lines (at a
  small optical thickness of the investigation object) is considered. It
  is shown that such a sitiation may exist not only at the non-Maxwellian
  velocity distribution, but at the Maxwellian distribution as well. The
  reason is that turbulent elements may have different radiation
  intensities, which is a realistic assumption, but this was ignored in
  the analyses of solar flares and other astrophysical objects.

Title: CCD observations of the Sun at the Balmer and Paschen continua.
Authors: Kurochka, L. N.; Belkina, I. L.; Beletskij, S. A.; Korokhin,
   V. V.; Marchenko, G. P.
Bibcode: 1999A&AT...18..265K
Altcode:
  Preliminary results of solar CCD observations of the Balmer and Paschen
  continua and of the Balmer precontinuum are presented. The Balmer
  precontinuum intensity distribution for the emission features of AR
  7890 NOAA/USAF are obtained. The limits of electronic concentration in
  the plasma volume along the line of sight are evaluated for an emission
  feature from this AR. Solar monitoring at the hydrogen series continua
  and precontinua appears to have considerable promise.

Title: Subtelescopic structure of the solar corona at observation
    in Thomson and Balmer continuum.
Authors: Kurochka, L. N.; Matsuura, O. T.; Picazzio, E.; Tellefsen,
   V.; Stegmann, S.; Bedaque, I. P.
Bibcode: 1998IBUAA..12...34K
Altcode:
  No abstract at ADS

Title: Observations and analysis of emission from solar active
    regions at the edge of the Balmer continuum
Authors: Kurochka, L. N.; Belkina, I. L.; Beletskij, S. A.; Korokhin,
   V. V.; Marchenko, G. P.
Bibcode: 1997AZh....74..460K
Altcode:
  The first results of CCD observations of the sun in the Balmer and
  Paschen continua and in the Balmer precontinuum are presented. The
  intensity distribution in the Balmer precontinuum in a knot in the
  active region NOAA/USAF 7890 provides information about inhomogeneities
  in the electron density of the plasma along the line of sight. The value
  of conducting monitoring observations of this kind is demonstrated.

Title: Observations and analysis of emission from solar active
    regions at the edge of the Balmer continuum
Authors: Kurochka, L. N.; Belkina, I. L.; Beletskii, S. A.; Korokhin,
   V. V.; Marchenko, G. P.
Bibcode: 1997ARep...41..404K
Altcode:
  No abstract at ADS

Title: Subtelescopic Inhomogeneities of Electron Density in The
    Solar Corona
Authors: Kurochka, L. N.; Matsuura, O. T.; Picazzio, E.
Bibcode: 1997SoPh..170..227K
Altcode:
  The brightness of the solar corona due to Thomson scattering depends
  linearly on the electron density, while the brightness due to the
  Balmer continuum is proportional to its square. As a consequence,
  information on the distribution of the electron density in the corona
  can be obtained by comparing the radial profiles of the surface
  brightness in both continua. This idea was explored for the first
  time in the solar eclipse of November 03, 1994, in Foz do Iguaçu,
  PR, Brazil. Pictures of the corona were obtained with interference
  filters, one centered at 477 nm (Thomson continuum) and another one at
  347 nm (Balmer continuum). The second filter also transmits the Thomson
  continuum through its spectral window, so that the Balmer images contain
  Thomson contamination. This paper reports on the observational results
  and presents their preliminary analysis. It was found that in certain
  radial directions, the normalized profiles of both continua (Thomson
  and contaminated Balmer) coincide, but in other directions they differ
  significantly. The non-coincident profiles may only occur if Balmer
  emission becomes important in relation to the Thomson scattering. A
  simple calculation shows that in such cases the electron density in
  the inner corona must exceed the values of standard models by up to
  ≃ 6.1 × 10<SUP>4</SUP> times, maintaining however the total number
  of electrons along the line of sight in agreement with the prediction
  of standard models. It is concluded that the corona contains high
  electron concentration in cloudlets of subtelescopic sizes down to
  ≃ 10<SUP>6</SUP> cm. The varied behavior of the radial profiles
  of both continua in different radial directions, suggests that the
  subtelescopic structures might be related to the spatially variable
  topology of coronal magnetic flux tubes.

Title: Objectives of a Ukrainian solar-oriented satellite.
Authors: Kryachko, I. P.; Kurochka, L. N.; Tel'Nyuk-Adamchuk, V. V.
Bibcode: 1997ASIC..494..233K
Altcode: 1997topr.conf..233K
  The project is focused on the ultilization of the Ukrainian space
  technology and industrial potential, within the framework of the
  National Space Agency of Ukraine activity. The initial stages of the
  project are: concept formulation, compilation of preliminary proposals,
  outlining of the set of appropriate scientific experiments to be made
  in space, matching both the demands of scientific experiments and
  the technical possibilities for their accomplishment, in light of the
  desirable orbit parameters, satellite orientation accuracy, and so on.

Title: A possibility for studying subtelescopic structures in the
    solar corona.
Authors: Kryachko, I. P.; Kurochka, L. N.; Tel'Nyuk-Adamchuk, V. V.
Bibcode: 1997ASIC..494..177K
Altcode: 1997topr.conf..177K
  It is shown that information on the existence of subtelescopic
  (unresolved) inhomogeneities having increased density in the coronal
  structures may be obtained by comparing two filtergrams one either
  side of the Balmer jump, one at λ &lt; 365 nm and the other at,
  for example λ = 580 nm or λ = 477 nm.

Title: Reobservation of Subtelescopic Coronal Condensation in the
    Solar Eclipse of February 26, 1998
Authors: Picazzio, E.; Matsuura, O. T.; Kurochka, L. N.; Fogliano,
   F. I.
Bibcode: 1996RoAJ....6..103P
Altcode:
  No abstract at ADS

Title: The Balmer Jump in Astrophysical Hydrogen Plasmas
Authors: Kurochka, L. N.
Bibcode: 1995SoPh..156...65K
Altcode:
  It is shown that, according to accepted theoretical concepts, there
  should be no intensity jump at the edge of the Balmer continuum,
  nor at that of other hydrogen series. We point out three reasons for
  a fairly smooth increase of the intensity to occur at the continuum
  edge. As a result, `the jump' sometimes spreads over hundreds of
  ångstroms, due mainly to the electron density inhomogeneity of solar
  plasma. Furthermore, the Doppler and Stark effects also give rise to
  a considerable spread of the series edge. We point out that excess
  continuum emission over a relatively narrow spectral interval before
  the continuum edge can result from overlapping of line wings.

Title: On the Recording of Regions with Increased Plasma Density on
    the Sun
Authors: Kurochka, L. N.; Kriachko, I. P.; Markova, E.
Bibcode: 1992SoPh..139..275K
Altcode:
  For the purpose of studying the statistics, dynamics, and morphology
  of parts of the solar surface with enhanced emission measure and
  considerable inhomogeneities of electron concentration, it is suggested
  that a new type of solar observation be introduced: taking filtergrams
  by means of interference filters, calculated for the Balmer continuum
  limit and the region of the blue continuum. To determine accurately
  the inhomogeneity of the electron concentration in an object, it is
  suggested to scan the surface of the object and record the spectrum
  of the blue continuum by means of a spectrochronograph.

Title: Structural changes in the solar corona during the July
    1991 eclipse
Authors: Zirker, J. B.; Koutchmy, S.; Nitschelm, C.; Stellmacher, G.;
   Zimmermann, J. P.; Martinez, P.; Kim, I.; Dzyubenko, N.; Kurochka,
   L.; Makarov, V.
Bibcode: 1992A&A...258L...1Z
Altcode:
  Preliminary results of the analysis of radially filtered pictures
  obtained at several hours interval during the July 11, 1991 total
  solar eclipse are given. Instrumental parameters and method are
  outlined. Structural changes are discussed.

Title: The solar corona of July 11, 1991. Observations in Brazil
    (MICE).
Authors: Dzyubenko, N. I.; Kurochka, L. N.; Rubo, G. A.; Kim,
   I. S.; Artamonov, B. P.; Boczko, R.; Matsuura, O. T.; Koutchmy, S.;
   Zimmermann, J. P.; Zirker, J. B.
Bibcode: 1992ATsir1552...21D
Altcode:
  No abstract at ADS

Title: The Kiev University expedition for observing the solar eclipse
    of July 11, 1991.
Authors: Dzyubenko, N. I.; Kurochka, L. N.; Tel'Nyuk-Adamchuk, V. V.
Bibcode: 1992VisKi...6..100D
Altcode:
  Information is given about the Kiev University expedition for the
  total solar eclipse on 11 July 1991 observation in Brazil (dynamics and
  structure of the solar corona) and in Mexico (investigation of solar
  diameter variations). The expedition was successful, photographs of
  the solar corona and photometric records of the solar flux near the
  total eclipse phase were obtained.

Title: Registration of macro- and micro-inhomogeneities of plasma
    density in astrophysical objects.
Authors: Kurochka, L. N.
Bibcode: 1991KFNT....7...31K
Altcode: 1991KFNT....7d..31K; 1991KNFT....7...31K
  Expedience of observations of extended astrophysical objects (like
  solar formations) using a broad-band filter behind the Balmer limit
  is indicated. These filtergrams may give information on macroscopic
  inhomogeneities of plasma density. It is shown that rather good
  knowledge about micro-inhomogeneities of plasma density (on the
  subtelescopic level) and extension of the volumes with different
  electron density can be received from intensity distribution in the
  Balmer or other hydrogen series precontinuum.

Title: Registration of macro- and micro-inhomogeneities of plasma
    density in astrophysical objects.
Authors: Kurochka, L. N.
Bibcode: 1991KPCB....7d..25K
Altcode: 1991KPCB....7...25K
  The advantages of setting up observations of extended astrophysical
  objects (such as solar formations) using a broadband filter beyond the
  limit of the Balmer continuum are indicated. The filtergrams would give
  information on macroscopic plasma-density inhomogeneities. It is shown
  that a rather complete picture of plasma-density micro-inhomogeneities
  (at the subtelescopic level) and extended regions with contrasting
  electron densities can be obtained from data on the intensity
  distribution in the region of the Balmer precontinuum or the
  precontinuum of another series.

Title: Microinhomogeneities and Macroinhomogeneities of Density in
    a Quiescent Prominence
Authors: Kurochka, L. N.; Kiryukhina, A. I.
Bibcode: 1990LNP...363..238K
Altcode: 1990IAUCo.117..238K; 1990doqp.coll..238K
  The analysis of a bright prominence of August 13, 1972 was carried
  out. Continuous spectrum due to Thomson scattering of solar radiation on
  free electrons and the Balmer precontinuum stipulated by free bounded
  transitions in the volumes with different electron concentration ne
  (Kurochka, Kiryukhina, 1989) were observed in the spectrum of this
  prominence. Heir intensities can be explained only by assuming that
  there are volumes with different values of electron concentration ( 1010
  ne 1012 cm-3) and extension in the prominence ( 105 109 ). In addition,
  there are extended volumes ( with ℓ of the order of the active region
  size and even larger) with relatively low temperature( Te &lt; 104 K)
  and electron concentration intermediate between the concentration in
  the prominence and that of the corona( 109 ⩽ ne ⩽ 1010 cm -3 ).

Title: Radiation from solar flares in the X-ray and optical ranges
    of the spectrum.
Authors: Kurt, V. G.; Kurochka, L. N.; Zenchenko, V. M.
Bibcode: 1989CosRe..27..358K
Altcode:
  Measurements of hard X-ray radiation, X<SUB>h</SUB>, from 180 solar
  flares, carried out on board the spacecraft Venera-13, -14, were
  compared with measurements of optical and thermal X-ray radiation,
  X<SUB>T</SUB>. The total quantity of energy release during the
  burst in these bands was calculated, and a correlation analysis was
  conducted. The resulting correlation relationships give evidence
  that the total energy of the fast electrons responsible for the
  X<SUB>h</SUB>-burst in the impulsive phase of the flare is related to
  the thermal energy at the end of the impulsive phase in a practically
  functional way. The quantitative relationship was determined between
  the importances of the flares in the H<SUB>α</SUB> line and the
  most probable values of the energy content in the various bands of
  radiation, by means of computations grounded within the generally
  accepted models. It is evident that the total energy of the optical
  (cool) part of the flare, the energy of the radiation in the X-ray
  band, and the energy introduced into the flaring volume by energetic
  particles are comparable with one another.

Title: Investigations of solar flares in the X-ray and optical
    spectral regions.
Authors: Kurt, Viktoriia; Kurochka, L. N.; Zenchenko, V. M.
Bibcode: 1989KosIs..27..425K
Altcode: 1989CosRe..27..425K
  Measurements of hard X-ray emission from 180 solar flares, as obtained
  on the Venera 13 and 14 probes, are compared with measurements
  of optical and thermal X-ray emissions. Values of the total energy
  release during a flare are calculated in these ranges, and a correlation
  analysis is carried out. The correlations found indicate that the total
  energy of fast electrons causing hard X-ray bursts in the impulsive
  flare phase and the thermal energy at the end of the impulsive phase
  have practically a functional relationship.

Title: Flare processes in a quiet prominence
Authors: Kurochka, L. N.; Kiryukhina, A. I.
Bibcode: 1989PAZh...15...82K
Altcode:
  A novel method is proposed for determining the limits of electron
  concentration variations in a plasma along the line of sight from the
  precontinuum of the Balmer series. The characteristic value of n(e)
  for volumes responsible for hydrogen line emission is about 5 x 10
  to the 10th/cu cm. It is concluded that, at small volumes of a quiet
  prominence, a powerful flarelike energy release takes place which
  manifests itself in a Balmer precontinuum.

Title: Analysis of the optical spectrum of a solar flare taking
    structural inhomogeneities into account.
Authors: Shaab, M. V.; Gladushina, N. A.; Kurochka, L. N.
Bibcode: 1989VeKie..31...30S
Altcode:
  No abstract at ADS

Title: The Height of Location of Optical Solar Flares
Authors: Venglinsky, E. R.; Kurochka, L. N.; Rossada, V. M.
Bibcode: 1989BSolD..12...85V
Altcode:
  No abstract at ADS

Title: Flare Processes in a Quiescent Prominence
Authors: Kurochka, L. N.; Kiryukhina, A. I.
Bibcode: 1989SvAL...15...36K
Altcode:
  No abstract at ADS

Title: The radiative energy of active regions on the Sun.
Authors: Venglinskij, E. R.; Zemanek, E. N.; Kurochka, L. N.
Bibcode: 1989VeKie..31...39V
Altcode:
  No abstract at ADS

Title: On a possibility of observing the 1990 July 22 solar eclipse
    in Taimyr and Indegirka.
Authors: Drake, N. A.; Kurochka, L. N.
Bibcode: 1988ATsir1532....8D
Altcode:
  No abstract at ADS

Title: Simultaneous observations of the solar spectrum in the infrared
    and visible regions with a new echelle spectrograph.
Authors: Kurochka, L. N.; Lozitskaya, N. I.; Lozitskij, V. G.; Nagulin,
   Yu. S.
Bibcode: 1988VeKie..30...46K
Altcode:
  No abstract at ADS

Title: Radiation energy estimation and analysis of optical solar
    flares observed in 1978.
Authors: Kurochka, L. N.; Lozitskii, V. G.; Palus, P.
Bibcode: 1987KFNT....3...46K
Altcode:
  Radiation energies of 5508 flares observed in 1978 are estimated. The
  radiation in all lines and in continua of hydrogen series (beginning
  with Lyman) with typical parameters of the flares of different
  intensities is taken into consideration. Mean energy values are obtained
  for flares of every importance which increase with importance, whereas
  the number of the flares observed decreases. With the flare energy
  decrease their number increases at first up to 5×10<SUP>20</SUP>J
  and then fastly decreases. This suggests that the flares on the Sun
  are independent events among other non-stationary processes.

Title: Energy Distribution of 15000 Solar Flares
Authors: Kurochka, L. N.
Bibcode: 1987SvA....31..231K
Altcode:
  No abstract at ADS

Title: Energy distribution of 15, 000 solar flares
Authors: Kurochka, L. N.
Bibcode: 1987AZh....64..443K
Altcode:
  An estimation of the radiation energy of 15 thousand flares observed
  during the period of 1978 - 1979 is made and an analysis is performed
  of their energy distribution. An equation is suggested for the
  energetic flare index which is characteristic of the flare energy
  release. Arguments are presented in favour of the idea that solar
  flares are an independent class of events on the sun. It is shown
  that the distributions of flares over energy both on the sun and on
  the UV Cet-type stars can be expressed by power dependences and have
  the same exponent.

Title: Variability of the sign of the altitude gradient of the
    magnetic field in the solar flare of July 25, 1981.
Authors: Lozitskij, V. G.; Kurochka, L. N.; Lozitskaya, N. I.
Bibcode: 1987SvA....30..484L
Altcode:
  No abstract at ADS

Title: Comparison of the total energy release in the optical and
    hard X-ray ranges of solar flares (Catalog).
Authors: Zenchenko, V. M.; D'Yachkov, A. V.; Kurochka, L. N.; Kurt,
   V. G.; Yurovitskaya, E. V.
Bibcode: 1987BSolD1987...48Z
Altcode:
  An instrument is briefly described which measures hard X-ray radiation
  with an energy E<SUB>x</SUB> &gt; 50 keV from solar flares. The
  measurements were made on board the Venera 13, 14 spacecraft. These
  flares were used as a basis for a catalog where the total energy
  flux in the optical E<SUB>opt</SUB> and hard X-ray E<SUB>Hx</SUB>
  ranges of solar flares is compared. The procedure of E<SUB>Hx</SUB>
  and E<SUB>opt</SUB> calculations is described.

Title: Magnetic field inhomogeneity in the solar flare of
    25. VII. 1981.
Authors: Lozitskij, V. G.; Lozitskaya, N. I.; Kurochka, L. N.
Bibcode: 1987VeKie..29...33L
Altcode:
  No abstract at ADS

Title: Variability of the sign of the altitude gradient of the
    magnetic field in the solar flare of July 25, 1981
Authors: Lozitskii, V. G.; Kurochka, L. N.; Lozitskaia, N. I.
Bibcode: 1986AZh....63..814L
Altcode:
  It is found that the magnetic field gradient in the flare of July 25,
  1981 changed its sign with depth not less than 2-3 times. This result
  was obtained during the investigation of the flare's Zeeman spectrogram
  which involved the use of magnetosensitive lines located in the far
  wings of the H-beta line. It is suggested that the oscillating tail
  left behind by an MHD-soliton propagating in the flare is responsible
  for this marked sign change.

Title: Variability of the Sign of the Altitude Gradient of the
    Magnetic Field in the Solar Flare of 1981JUL25
Authors: Lozitskii, V. G.; Kurochka, L. N.; Lozitskaya, N. I.
Bibcode: 1986SvA....30..484L
Altcode:
  No abstract at ADS

Title: Heterogeneity in magnetic field of the solar flare on June
    25, 1981
Authors: Lozitskii, V. G.; Lozitskaya, N. I.; Kurochka, L. N.;
   Vapulik, B.
Bibcode: 1986CoSka..15..273L
Altcode:
  No abstract at ADS

Title: Energy distribution of 10,000 solar flares observed in 1979.
Authors: Kurochka, L. N.
Bibcode: 1986VeKie..28...17K
Altcode:
  No abstract at ADS

Title: Methods and results of an investigation of spectra of optical
    solar flares.
Authors: Kurochka, L. N.
Bibcode: 1984VeKie..26...33K
Altcode:
  No abstract at ADS

Title: On a statistical connection of radiation energy of solar
    flares in the optical and radio range.
Authors: Kurochka, L. N.; Pogodin, I. E.
Bibcode: 1983soac.conf...48K
Altcode:
  No abstract at ADS

Title: Physical conditions and peculiarities of the subtelescopic
    structure of flares.
Authors: Kurochka, L. N.
Bibcode: 1982cis..conf..160K
Altcode:
  No abstract at ADS

Title: The Energy of Optical Solar Flares - Part One
Authors: Kurochka, L. N.; Stasyuk, L. A.
Bibcode: 1981BSolD...5...83K
Altcode:
  No abstract at ADS

Title: The Energy of Optical Flares Radiation - Part Three
Authors: Kurochka, L. N.; Rossada, V. M.
Bibcode: 1981BSolD...7...95K
Altcode:
  No abstract at ADS

Title: Emission energy of optical solar flares. I.
Authors: Kurochka, L. N.; Stasyuk, L. A.
Bibcode: 1981BSolD1981...83K
Altcode:
  No abstract at ADS

Title: Energy of optical solar flares. II. III.
Authors: Kurochka, L. N.; Rossada, V. M.
Bibcode: 1981BSolD1981...78K
Altcode:
  No abstract at ADS

Title: The Energy of Optical Solar Flares - Part Two
Authors: Kurochka, L. N.; Rossada, V. M.
Bibcode: 1981BSolD...6...78K
Altcode:
  No abstract at ADS

Title: Horizontal solar telescope of the Kiev University Astronomical
    Observatory.
Authors: Kurochka, E. V.; Kurochka, L. N.; Lozitskij, V. G.;
   Lozitskaya, N. I.; Ostapenko, V. A.; Polupan, P. N.; Romanchuk, P. R.;
   Rossada, V. M.
Bibcode: 1980VeKie..22...48K
Altcode:
  No abstract at ADS

Title: Weakening of photospheric emission when passing through
    chromospheric flares. II.
Authors: Ostapenko, V. A.; Kurochka, L. N.
Bibcode: 1979BSolD1979...87O
Altcode:
  No abstract at ADS

Title: The Weakening of the Photospheric Emission after Going Through
    the Solar Flares - Part Two
Authors: Ostapenko, V. A.; Kurochka, L. N.
Bibcode: 1979BSolD...6...87O
Altcode:
  No abstract at ADS

Title: Results of a determination of the physical conditions in
    different solar flares. I.
Authors: Kurochka, L. N.; Ostapenko, V. A.
Bibcode: 1979BSolD1978...77K
Altcode:
  No abstract at ADS

Title: Blurring of lines at the limit of the hydrogen series.
Authors: Kurochka, L. N.; Rybko, L. B.
Bibcode: 1979Afz....15..155K
Altcode:
  An expression is obtained for determining the electron density in a
  hydrogen plasma on the basis of the last observable line in the Balmer
  series. The expression is derived for the case of line broadening by
  the Stark effect (ions + electrons) and the Doppler effect when the
  observations are made in the presence of background radiation that
  reduces the line contrast.

Title: Electron temperature and temperature of Lalpha emission in
    solar features.
Authors: Kurochka, L. N.; Kurochka, E. V.; Ostapenko, V. A.
Bibcode: 1979BSolD1978...94K
Altcode:
  No abstract at ADS

Title: Weakening of photospheric emission at the transit through
    chromospheric flares. I.
Authors: Kurochka, L. N.; Ostapenko, V. A.
Bibcode: 1979BSolD1978...68K
Altcode:
  No abstract at ADS

Title: Blurring of lines at the limit of the hydrogen series
Authors: Kurochka, L. N.; Rybko, L. B.
Bibcode: 1979Ap.....15...93K
Altcode:
  No abstract at ADS

Title: Calculation of line profiles of inhomogeneous solar formations.
Authors: Kurochka, L. N.; Telniuk-Adamchuk, V. V.
Bibcode: 1978SoPh...59...11K
Altcode:
  A generalized equation was obtained for calculation of line profiles
  of solar formations in the assumption of their inhomogeneity. Line
  profiles of homogeneous formations are a particular consequence of
  this equation. Analysis of the equation and line profiles calculated
  from it was carried out.

Title: The last observable line in hydrogen emission spectrum.
Authors: Kurochka, L. N.; Ribko, L. B.
Bibcode: 1978SoPh...57..319K
Altcode:
  It is shown that outside continuous solar spectrum or diffused solar
  light in the Earth's atmosphere substantially reduces the contrast
  and quality of observable emission lines in the hydrogen spectrum. A
  formula is obtained which enables the electron concentration in hydrogen
  plasma to be determined by the last observable line with due account
  for outside (spurious) continuous spectrum.

Title: Optical Thicknesses and Degree of Ionization of Hydrogen in
    Chromospheric Flares of Various Importances
Authors: Kurochka, L. N.; Ostapenko, V. A.
Bibcode: 1978BAICz..29...82K
Altcode:
  No abstract at ADS

Title: Physical conditions in large solar flares. I. A calculation
    method.
Authors: Kurochka, L. N.; Ostapenko, V. A.
Bibcode: 1978BSolD1978...67K
Altcode:
  No abstract at ADS

Title: Physical conditions in chromospheric flares of mean importance.
Authors: Kurochka, L. N.; Ostapenko, V. A.
Bibcode: 1978VeKie..20...14O
Altcode: 1978VeKie..20...14K
  No abstract at ADS

Title: Physical conditions in large solar flares. II. Results of
    calculation.
Authors: Kurochka, L. N.; Ostapenko, V. A.
Bibcode: 1978BSolD1978...82K
Altcode:
  No abstract at ADS

Title: Line profiles of inhomogeneous solar phenomena with different
    porosity.
Authors: Kurochka, L. N.; Telniuk-Adamchuk, V. V.
Bibcode: 1977AAfz...33...41K
Altcode:
  A formula is obtained for calculating the line profiles of inhomogeneous
  solar structures with their porous structure taken into account. The
  formula is valid for chaotic macroscopic motions in inhomogeneous
  emission objects. It is assumed that the emission centers are
  homogeneous and the macroscopic motion of the objects is precisely the
  motion of individual emission elements of fine structure. The formula
  takes into account the mutual screening of elements. Simplifications
  of the formula are available when macroscopic motions are absent and
  mutual screening is small. Tabulated values of a particular function are
  provided, needed for the case of Maxwellian distribution of macroscopic
  velocities of emission elements and constant source function along
  the line of sight within each element.

Title: Main parameters for optically flares of different
    importance. I.
Authors: Kurochka, L. N.
Bibcode: 1977BSolD1977...53K
Altcode:
  No abstract at ADS

Title: On the number of lines observed in the hydrogen spectrum.
Authors: Kurochka, L. N.
Bibcode: 1977BSolD1977...90K
Altcode:
  No abstract at ADS

Title: Why few lines of the Balmer series are observed in flares on
    the disk
Authors: Kurochka, L. N.; Sitnik, G. F.
Bibcode: 1976SvA....19..590K
Altcode:
  It is shown that upper-level populations of hydrogen atoms in
  solar flares are distributed according to the statistical weights
  of the levels and that optical thickness in the high Balmer lines is
  significantly less than unity. Calculations indicate that due to these
  two conditions, the intensities of the high Balmer lines should fall
  rapidly with number, which also leads to the small number of observed
  lines in flares on the disk. The second-level population of hydrogen
  atoms is estimated together with the extent of emission in flares.

Title: Contours of Emission Lines of Inhomogeneous Solar Formations
Authors: Kurochka, L. N.; Ostapenko, A. V.; Sugai, S. P.; Palus, P.
Bibcode: 1976BAICz..27..346K
Altcode:
  It is shown that chromospheric flares and prominences are essentially
  inhomogeneous and that the theoretical line profiles of these
  phenomena have to be calculated taking this inhomogeneity into
  account. In this case, the observed line profiles are in accordance
  with the theoretical ones. Theoretical half-width curves of the line
  profiles of inhomogeneous emission formations have been calculated
  for different relative values of turbulent velocities in order to
  determine the optical thicknesses.

Title: Emission line profiles of inhomogeneous solar formations.
Authors: Kurochka, L. N.; Ostapenko, V. A.
Bibcode: 1976opa..confQ..11K
Altcode:
  No abstract at ADS

Title: Why few lines of the Balmer series are observed in flares on
    the disk
Authors: Kurochka, L. N.; Sitnik, G. F.
Bibcode: 1975AZh....52..975K
Altcode:
  It is shown that upper-level populations of hydrogen atoms in
  solar flares are distributed according to the statistical weights
  of the levels and that optical thickness in the high Balmer lines is
  significantly less than unity. Calculations indicate that due to these
  two conditions, the intensities of the high Balmer lines should fall
  rapidly with number, which also leads to the small number of observed
  lines in flares on the disk. The second-level population of hydrogen
  atoms is estimated together with the extent of emission in flares.

Title: The last resolvable line in the hydrogen spectrum
Authors: Kurochka, L. N.
Bibcode: 1975SvA....18..526K
Altcode:
  No abstract at ADS

Title: Radiation of Chromospheric Flares in Hydrogen Lines
Authors: Kurochka, L. N.; Kurochka, E. V.; Ostapenko, V. A.
Bibcode: 1975BAICz..26...23K
Altcode:
  The energy radiated by flares of various classes in the Lyman, Balmer,
  Paschen, and Brackett series are calculated for different optical
  thicknesses of the flares. It is shown that the amount of energy
  radiated in all the hydrogen lines is 4 to 5 times greater than that
  radiated only in H-alpha. Statistical reduction of the observational
  data yields the characteristic areas for flares of various classes,
  the relative H-alpha line widths, the derived Doppler widths at the
  maximum, lifetimes, and the relative number of flares of each class
  on the sun. The characteristic time variations of the basic flare
  parameters are determined, and an estimate is made of the total energy
  radiated by flares of various classes. The total energy radiated by
  flares of a particular class is shown to be approximately the same.

Title: Estimate of inhomogeneities of objects in calculating the
    emission line profiles.
Authors: Kurochka, L. N.; Ostapenko, V. A.
Bibcode: 1975BSolD1975...96K
Altcode:
  No abstract at ADS

Title: Calculation of the radiant energy of chromospheric flares.
Authors: Kurochka, L. N.; Kurochka, E. V.; Ostapenko, V. A.
Bibcode: 1975VeKie..17...12K
Altcode:
  No abstract at ADS

Title: On the character of flare energy release on short-lived
    sunspot groups.
Authors: Rossada, V. M.; Kurochka, L. N.
Bibcode: 1975BSolD1975...85R
Altcode:
  No abstract at ADS

Title: The radiant energy and structure of chromospheric flares.
Authors: Kurochka, L. N.; Kurochka, E. V.; Ostapenko, V. A.
Bibcode: 1975VeKie..17...25K
Altcode:
  No abstract at ADS

Title: The last resolvable line in the hydrogen spectrum
Authors: Kurochka, L. N.
Bibcode: 1974SvA....18..526K
Altcode:
  A formula is derived which makes it possible to determine the electron
  concentration in a plasma from the number of the extreme resolved line
  when there is line broadening from the combined Stark effect and the
  Doppler effect. The formula is applied to a series of hydrogen line
  shapes, and the conditions for its validity are discussed.

Title: The last resolvable line in the hydrogen spectrum
Authors: Kurochka, L. N.
Bibcode: 1974AZh....51..892K
Altcode:
  A formula is derived which makes it possible to determine the electron
  concentration in a plasma from the number of the extreme resolved line
  when there is line broadening from the combined Stark effect and the
  Doppler effect. The formula is applied to a series of hydrogen line
  shapes, and the conditions for its validity are discussed.

Title: On Lyman's Emission of Solar Flares
Authors: Křivsky, L.; Kurochka, L. N.
Bibcode: 1974BAICz..25...52K
Altcode:
  No abstract at ADS

Title: On the Populations of Quantum Levels of Hydrogen Atoms in
    Chromospheric Flares
Authors: Kurochka, E. V.; Kurochka, L. N.
Bibcode: 1973BAICz..24..132K
Altcode:
  No abstract at ADS

Title: The emission of chromospheric flares in the ultraviolet and
    infrared spectral regions.
Authors: Kurochka, E. V.; Kurochka, L. N.
Bibcode: 1973VeKie..15...10K
Altcode:
  No abstract at ADS

Title: Spectrophotometry and analysis of intensive hydrogen and Ca
    II lines in the spectrum of 30 chromospheric flares.
Authors: Stembkovskaya, T. V.; Kurochka, L. N.
Bibcode: 1973AAfz...19...70S
Altcode:
  No abstract at ADS

Title: Saha's Equation under Deviation from Thermodynamic Equilibrium
Authors: Kurochka, L. N.
Bibcode: 1973BAICz..24..210K
Altcode:
  No abstract at ADS

Title: Observations of the solar eclipse on July 10, 1972 by the
    expedition of the Kiev Department of the Astronomical and Geodetical
    Society.
Authors: Pyaskovskij, D. V.; Nesmyanovich, A. T.; Kurochka, L. N.
Bibcode: 1973ATsir.756....7P
Altcode:
  No abstract at ADS

Title: Analysis of the weak chromospheric flare spectrum.
Authors: Kurochka, E.; Kurochka, L.; Stembkovskaya, T.
Bibcode: 1971BSolD1971R..87K
Altcode:
  No abstract at ADS

Title: Electron Concentration and Structure of Chromospheric Flares.
Authors: Kurochka, L. N.
Bibcode: 1970SvA....14...89K
Altcode:
  No abstract at ADS

Title: Electron Concentration and Structure of Chromospheric Flares.
Authors: Kurochka, L. N.
Bibcode: 1970AZh....47..111K
Altcode:
  No abstract at ADS

Title: Determination of Electron Density in Plasma by the Number of
    the Extreme Resolved Line
Authors: Kurochka, L. N.; Maslennikova, L. B.
Bibcode: 1970SoPh...11...33K
Altcode:
  The paper shows that the dependence of the number of the extreme
  resolved line on the electron density obtained for the Balmer series
  (Kurochka, 1967) considering the broadening action of the electrons,
  remains true for the Lyman and Paschen series as well. For these series
  a formula which gives the dependence of the number of the extreme
  resolved line on the velocity of hydrogen atoms when the lines are
  broadened by the Doppler effect, has been derived.

Title: Spectrophotometric study of the chromospheric flare on
    September 6, 1957.
Authors: Kurochka, L. N.; Ostapenko, V. A.
Bibcode: 1970BSolD1970..111K
Altcode:
  No abstract at ADS

Title: The dependence of the number of the extreme resolved line of
    Lyman series on electron density.
Authors: Kurochka, L. N.; Maslennikova, L. B.
Bibcode: 1970VeKie..12...25K
Altcode:
  No abstract at ADS

Title: An Analysis of Hydrogen-Line Profiles Broadened by the Stark
    and Doppler Effects.
Authors: Kurochka, L. N.
Bibcode: 1969SvA....13...64K
Altcode:
  No abstract at ADS

Title: An Analysis of Hydrogen-Line Profiles Broadened by the Stark
    and Doppler Effects.
Authors: Kurochka, L. N.
Bibcode: 1969AZh....46...85K
Altcode:
  No abstract at ADS

Title: The last resolved line in the balmer series
Authors: Kurochka, L. N.
Bibcode: 1968Ap......4..240K
Altcode:
  No abstract at ADS

Title: The last resolved line of Balmer series.
Authors: Kurochka, L. N.
Bibcode: 1968Afz.....4..581K
Altcode:
  No abstract at ADS

Title: Stark Broadening of Hydrogen Lines.
Authors: Kurochka, L. N.
Bibcode: 1967SvA....11..290K
Altcode:
  No abstract at ADS

Title: Stark Broadening of Hydrogen Lines.
Authors: Kurochka, L. N.
Bibcode: 1967AZh....44..368K
Altcode:
  No abstract at ADS

Title: The Doppler effect and the last resolvable line of the
    Balmer series
Authors: Kurochka, L. N.
Bibcode: 1966Ap......2...67K
Altcode:
  No abstract at ADS

Title: Determination of electron density from emission lines of the
    balmer series
Authors: Kurochka, L. N.
Bibcode: 1965Ap......1..195K
Altcode:
  No abstract at ADS

