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Recent publications
Minakov A.A., Vakulik V.G. The effect of microlensing on the properties of images seen in close vicinity of critical curves of gravitational lenses. - Submitted to "Pisma v Astronomicheski Jurnal", in Russian.
V.Dudinov, P.Bliokh, B.Paczynski, H.N.Omma, R.Schild, W.Colley, V.Vakulik, A.Zheleznyak, A.Sergeyev, B. Artamonov, S.Nuritdinov, and Ehgamberdiev. A Program of International Cooperative Investigation of Gravitational Lens Systems. (pdf 152Kb) Korokhin V., Akimov A., Beletsky S., Belkina I., Velikodsky Y., Marchenko G., Shaparenko E. Muli-Wave Station of Solar Monitoring. "Rom.Astron J.", Vol.9, Supplemen, p. 83-86, Bucharest, 1999. A technical description of the contemporary solar telescope of the Kharkov Astronomical Observatory (http://khassm.virtualave.net) is given, and the plan to future development is sketched. A wide range monitoring of solar activity including observations near UV range in Balmer continuum and the IR line of He 1083nm is presented. Akimov L.A., Velikodsky Yu.I., and Korokhin V.V. Dependence of Latitude Brightness Distribution Over the Lunar Disk on Albedo and Relief "Kinematika i fisika nebesnykh tel.". -2000. -V.16, No 2. -P.181-187. In Russian. Results of brightness distribution measurements of the lunar disk and laboratory samples at different phase angles in blue and red spectral bands are presented. It is shown for the Moon that brightness falling with photometric latitude is formed mainly by micro- and mesorelief of its surface. Small decreasing of brightness falling with wavelength is due to not so much albedo changing as changing of microrelief size range which has an influence on the law of light reflection by the Moon. Akimov L.A., Belkina I.L., Beletsky S.A., Dyatel N.P. D3 HeI CHROMOSPHERE FROM TOTAL SOLAR ECLIPCES OBSERVATIONS. Part.1. CONSTRUCTION OF AN IMAGE OF THE SOLAR CHROMOSPHERE IN THE SPECTRAL LINES "Kinematika i fisika nebesnykh tel.". -2000. -V.16, No 2. -P.145-152. In Russian. Using 350 eclipse chromospheric spectra obtained for the west limb of the Sun during the total solar eclipse of July 31, 1981 the image of the solar chromosphere in the D3 helium line was constructed. The description of a fast automatic microphotometer for scaning the photographic images is given. The method of the construction of chromospheric images is shown. Additional peak of chromospheric D3 surface brightness at the height of around 300 km over all measured latitudes was found.
Some features of CCD-detectors using for
astrophysical observations of the Moon, the Sun and planets are
considered. New photopolarimeter on the base of CCD-camera is
created on KhAO. The device description and test observation results
are shown. The program complex Akimov L.A., Beletsky S.A., Dyatel N.P. The chromospheric D3 helium emission observed at the total solar eclipse of July 31, 1981 // Astronomical and astrophysical transections. -1999- V.18(1), p. 253-259. The digital images of 350 eclipse chromospheric spectra obtained with a special automatic photometer have been used to construct the image of the D3 HeI chromosphere over the range of 36°N - 42°S in latitude. The chromospheric emission comes from two very irregular layers with peaks of the intensities at the heights of 1100 - 1700 km for the layer with the dominant emission, and at the height of around 300 km for the lower layer. The distribution of the surface brightness averaged over all measured latitudes (36°N - 42°S) versus height also reveals two peaks. The energy emitted by the upper layer is determined to be 7 times larger than that emitted by the lower one. The chromospheric D3 emission is well correlated with the emission of the green corona (503.3 nm) at low heights. The correlation disappears at heights more than 1500 km. The chromosphere above active regions and spots is lowered. It is supposed that such behaviour is affected by large scale magnetic fields of the Sun and by structural elements, such as spicules and fibrils. Akimov L.A., Velikodsky Yu.I., Korokhin V.V. Dependence of Lunar Highlands Brightness on Photometric Latitude // Kinematika i fisika nebesnykh tel. -1999. -V.15, No 4. -P.304-309. In Russian. Results of photometric measurements of the Moon at different phase angles are presented. Brightness distribution as the function of photometric latitude has been studied. It is shown that brightness falling to poles increases with phase angle a, and at a~120° the Moon reflects nearly by the Lambert's law. The origin of such phenomenon is discussed. Bliokh P.V., Dudinov V.N., Vakulik V.G., et al. The system Q2237+0305 (Einstein Cross) from observations of 1997 on Maidanak Mountain. // "Kinematika i Fisika Neb.Tel." - 1999. - 15. - N 2, P. 338-349, in Russian. Erikson A., Berthier J., Denchev P.V., Harris A.W., Ioannov Z., Kryszczynska A., Lagerkvist C.-I., Magnusson P., Michalowski T., Nathues A., Piironen J., Pravec P., Sarounova L., Velichko F.P. Photometric observations and modelling of the asteroid 85 Io in conjuction with data from an occultation event during the 1995-96 apparition // Planet. Space Science, 1999. v. 47, p. 327-330. Head J.W., Hiesinger H., Ivanov M.A., Kreslavsky M.A., Pratt S., Thompson B.J. Possible ancient ocean on Mars: Evidence from Mars Orbiter Laser Altimeter data // Science. 1999. December, 10. Kiselev N.N. and Velichko F.P. Polarimetry and photometry of comet c/1995 01 Hale-Bopp. Planet. Space Sci., 1999. V. 49, P. 428-431. Kiselev N.N.,Rosenbush V.K., Jockers K. Polarimetry of asteroid 2100 Ra-Shalom at large phase angle. // Icarus, 1999. V.140, No.2, P. 464-466. Kreslavsky M.A., Head J.W. Morphometry of small shield volcanoes on Venus: Implications for the thickness of regional plains // J. Geophys. Res. 1999. V. 104. P. 18925-18932. Kreslavsky M.A., Head J.W. Kilometer-scale slopes on Mars and their correlation with geologic units: Initial results from Mars Orbiter Laser Altimeter (MOLA) data // J. Geophys. Res. 1999. V. 104. P. 21911-21924. Krugly Yu.N. GSC 614.01209 is a new variable star.// Inform. Bull. Commiss. 27 and 42 of the IAU. Number 4730. June 29, 1999, p. 1-2. Kurochka L.N. , Belkina I.L, Beletsky S.A., Korokhin V.V., Marchenko G.P. CCD- observations of the Sun in the Balmer and Pashen continue // Astronomical and astrophysical transections. -1999- V.18(1), p. 265-272. The first results of new kind observations in the Balmer and Pashen series continua and Balmer precontinuum are presented. Such observations will provide a valuable informations about Ne-irregulaties, processes occuring in the a.r. and formation here of areas with the enhaced plasma density. Shkuratov Yu.G., Kaydash V.G., Opanasenko N.V. Iron and titanium abundance and maturity degree distribution on lunar nearside // Icarus. 1999. 137. 222-234. Shkuratov Yu., Kreslavsky M., Ovcharenko A., Stankevich D., Zubko E. Pieters C., Arnold G. Opposition effect from Clementine data and mechanisms of backscatter // Icarus. 1999. 141. 132-155. Shkuratov Yu., Starukhina L., Hoffmann H., Arnold G. A model of spectral albedo of particulate surfaces: implication to optical properties of the Moon // Icarus. 1999. 137. 235-246. Stankevich D., Shkuratov Yu., Muinonen K. Shadow-hiding effect in ingomogeneous and layered particulate media // Journal of Quantitative Spectroscopy and Radiative Transfer. 1999. V.63, #2-6. P. 445-458. Tishkovets V.P., Shkuratov Yu.G., Litvinov P. A comparison of cooparative mechanisms at scattering by random oriented clusters of spherical particles // Journal of Quantitative Spectroscopy and Radiative Transfer. 1999. V.61. No 6. P. 767-773. Yu.I.Velikodsky, L.A.Akimov, and V.V.Korokhin. Two-parameter Empirical Photometric Function in Analysis of Earth-based Observations of the Moon // Lunar and Planet. Sci. 30-th. Abstract #1391. 2000. LPI. Houston. Improved empirical Akimov's formula is presented. This photometric function gives a good fit to Earth-based and Clementine observational data. An influence of albedo and relief on the disk brightness distribution is discussed. |
