Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.astro.spbu.ru/Sobolev100/sites/default/files/Sobolev-100.pdf Дата изменения: Fri Oct 2 20:58:45 2015 Дата индексирования: Sun Apr 10 01:59:30 2016 Кодировка: Поисковые слова: supernova


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Contents
M. Abrahamyan Some structural features of vortices in gravitating gaseous disk . . . . Ju. Aikasheva, A. Belyaev, S. Yakovleva Atomic data for inelastic pro cesses in low-energy rubidium-hydrogen collisions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . V. Akimkin Photo electric and collisional charging of dust in protoplanetary disks A. Alakoz, A. Sobolev, H. Imai, W. Baan, J. Moran, S. Parfenov and RadioAstron maser team Studies of cosmic water and hydroxyl masers within the "RadioAstron" Space-VLBI pro ject . . . . . . . . . . . . . . . . . . . . . . . . . . . . I. Alekseev, O. Kozlova The nature of long-term sp ectral variability of IN Com . . . . . . . . . S. Alexeeva The non-lo cal thermo dynamic equilibrium (NLTE) line formation of C I ­ C I I in the A- and late B-typ e stars . . . . . . . . . . . . . . . . . . E. Babina, S. Artemenko, P. Petrov Dynamics of wind and variations of circumstellar extinction in the classical T Tauri star RY Tau . . . . . . . . . . . . . . . . . . . . . S. Balashev, D. Varshalovich, A. Ivanchik, V. Klimenko Molecular hydrogen absorption systems at high redshifts . . . . . . . . S. Balashev, E. Kholupenko, J. Chluba, A. Ivanchik, D. Varshalovich Sp ectral distortions of the CMB dip ole . . . . . . . . . . . . . . . . . . . D. Barsukov, A. Tsygan The influence of small scale magnetic field on the p olar cap X-ray luminosity of old radio pulsars . . . . . . . . . . . . . . . . . . . . . . . . . O. Belova On the lo calization of emission lines region in Mira stars . . . . . . . . N. Beskrovnaya, P. Isakova, A. Zhylkin, N. Ikhsanov, D. Bisikalo Signs of a dead transient disk in AE Aquarii . . . . . . . . . . . . . . . . G. Bisnovatyi-Kogan, M. Glushikhina Electronic thermal conductivity in the crust of magnetized neutron stars: the solution of the kinetic equation by the Chapman-Enskog metho d . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A. Bisyarina, A. Sobolev, S. Gorda Variation of O I 6300 ° line emission in Herbig Be binary star HD 200775 A K. Bychkov Nonstationary hydrogen and helium discrete level o ccupation b ehind sho ck front . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A. Bykov High energy radiation of sup ernova remnants and starburst regions . A. Carciofi, J. Bjorkman 3-D NLTE radiative transfer mo dels using the Sob olev metho d . . . . S. Chakrabarti Radiative pro cesses in accretion and outflows in black holes . . . . . . P. Chardonnet, V. Chechetkin, M. Popov, A. Filina, A. Baranov Cosmic gamma-ray bursts: a challenge for radiation pro cesses in astrophysics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

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A. Cherepashchuk Black holes in binary stellar systems and galactic nuclei . . . . . . . . G. Chernov Fine structure of solar radio emission . . . . . . . . . . . . . . . . . . . . E. Churazov Gamma-rays from typ e Ia sup ernova SN 2014J . . . . . . . . . . . . . . R. Dagkesamanskii, I. Zheleznykh Giant radio telescop es as the detectors of UHE cosmic rays and the new p ossibilities with the SKA . . . . . . . . . . . . . . . . . . . . . . R. Dagkesamanskii, V. Shishov, I. Chashei, V. Oreshko, S. Logvinenko, S. Tyul'bashev, I. Subaev Monitoring of variable radio sources at 111 MHz with the multi-b eam radio telescop e BSA LPI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A. Dementyev Polarization of resonance lines in case of p olarized primary sources of radiation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . T. Demidova, V. Grinin, J.-P. Ruge, S. Wolf Simulation of structures in protoplanetary disks . . . . . . . . . . . . . J. Dlugach, M. Mishchenko Numerical simulation of electromagnetic scattering by morphologically complex ob jects . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . H. Domke Nonhomogeneous atmospheres -- on transforming conservative multiple scattering to nonconservative multiple pseudo-scattering . . . . . V. Dushin, A. Kholtygin Non-stationary pro cesses in atmospheres of early-typ e stars: influence on forbidden to intercombination ratio (f /i) . . . . . . . . . . . . . . . . A. Escala, F. Becerra, J. Utreras Numerical exp eriments on the physical parameters of the star formation law . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . S. Fabrika Ultraluminous X-ray sources as sup er-Eddington accretion disks . . . M. Gilfanov Role of accreting compact sources in ionizing ISM in elliptical galaxies Yu. Gnedin Polarimetric metho d of V.V. Sob olev for measuring black hole masses in active galactic nuclei . . . . . . . . . . . . . . . . . . . . . . . . . . . . . O. Golubchina Prop erties of the solar p olar coronal holes radiation according to radio observations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . V. Grigoryev A 2D mo del of non-stationary accretion onto a magnetized neutron star . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . V. Grinin The Sob olev approximation in the development and astrophysical applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . H. Harutyunian, G. Alecian, Q. Khachatryan, A. Vardanyan Description of frequency redistribution functions via bilinear expansions S. Hubrig Magnetic fields in massive stars: new insights . . . . . . . . . . . . . . .

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S. Ibadov Generation of hot plasma and X-Rays in comets . . . . . . . . . . . . . S. Ibadov Search for high-energy photons from comets during solar flares . . . . N. Ikhsanov, L. Pustil'nik How accreting matter enters the magnetic field of neutron stars? . . V. Il'in, N. Voshchinnikov, T. Henning Mid-infrared extinction constraint on cosmic dust mo dels . . . . . . . N. Ismailov, O. Khalilov, G. Bahaddinova Optical sp ectrum variability of IL Cep A . . . . . . . . . . . . . . . . . . P. Ivanov, J.C.B. Papaloizou, S.-J. Paardekooper, A. Polnarev The evolution of a binary in a retrograde circular orbit emb edded in an accretion disk . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A. Kaminker, A. Kaurov, A. Potekhin, D. Yakovlev Thermal radiation of neutron stars with internal heaters . . . . . . . . N. Katysheva, V. Grinin Relative intensities of the hydrogen lines as a to ol for diagnostics of the astrophysical plasma . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A. Kazantsev, V. Potapov Search for the Giant Pulses (GPs) -- an extreme phenomenon in radio pulsar emission . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E. Khachikian Problems of dualcore galaxies . . . . . . . . . . . . . . . . . . . . . . . . . A. Kholtygin V.V. Sob olev and physics of gaseous nebulae . . . . . . . . . . . . . . . . A. Khoperskov, S. Khoperskov, E. Vasiliev, A. Sobolev Molecular clouds dynamics in the Milky Way . . . . . . . . . . . . . . . V. Kim, N. Ikhsanov Origin of the isolated neutron star with anomalously long p erio d 6.7 hr. N. Kiselev, V. Rosenbush, S. Zaitsev, V. Afanasiev, S. Kolesnikov, D. Shakhovskoy Polarimetric prop erties of icy mo ons of the outer planets . . . . . . . A. Kolesov On the development of the asymptotic theory of non-stationary radiative transfer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . S. Komissarov, O. Porth Stability of AGN jets and the Fanaroff-Riley division . . . . . . . . . . F. Kopylova, A. Kopylov Structure of galaxy groups and clusters and measurement their masses F. Kopylova, A. Kopylov The fundamental plane of clusters and groups of galaxies . . . . . . . . O. Kozlova, I. Alekseev The study of the long-term sp ectral variability of Ae Herbig star HD 190073 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . J. Krelowski Diffuse interstellar bands approaching centenary . . . . . . . . . . . . . S. Levshakov Testing the variation of fundamental constants by astrophysical metho ds: overview and prosp ects . . . . . . . . . . . . . . . . . . . . . . . . . .

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M. Livshits, M. Katsova Sup erflares on late-typ e stars: radiative losses and other problems of mo deling of the gas-dynamical pro cesses . . . . . . . . . . . . . . . . . . A. Lutovinov, M. Revnivtsev, S. Tsygankov, R. Krivonos X-ray binary systems through the eyes of INTEGRAL . . . . . . . . . O. Maryeva, E. Chentsov LBV stars HD 168625 and HD 168607 and their environment . . . . . O. Maryeva, V.F. Polcaro, C. Rossi, R. Viotti Mo deling of sp ectral variability of Romano's star . . . . . . . . . . . . . L. Mashonkina, A. Belyaev Non-LTE line formation for Al I and Si I in stellar atmospheres, with applying accurate data on inelastic collisions with neutral hydrogen atoms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A. Medvedev, A. Kholtygin Magnetic field distribution for massive stars . . . . . . . . . . . . . . . . Kh. Mikayilov, I. Alakbarov, A. Rustamova Some sp ectral characteristics of symbiotic stars AG Dra and CH Cyg in their active phases . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . M. Mischenko Electromagnetic scattering by discrete random media . . . . . . . . . . A. Mokrushina The calculation of parameters for sup ernovae employing AZT-8 and LX200 telescop es . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E. Morchenko Continuum and line emission of flares on red dwarf stars . . . . . . . . M. Murga, S. Khoperskov, D. Wiebe Carb onaceous dust emission and evolution in star-forming complexes A. Mushtukov, V. Suleimanov, S. Tsygankov, Ju. Poutanen, D. Nagirner, A. Lutovinov, A. Serber X-ray pulsars in a wide luminosity range . . . . . . . . . . . . . . . . . . D. Nagirner Synchro-self-Compton mechanism . . . . . . . . . . . . . . . . . . . . . . . D. Nagirner V.V. Sob olev and Radiative Transfer Theory . . . . . . . . . . . . . . . . A. Nesterenok Simulation of CH3 OH masers: accelerated lamb da iteration metho d and Sob olev approximation . . . . . . . . . . . . . . . . . . . . . . . . . . . A. Nikoghossian On some directions of development of the radiative transfer theory . E. Nikolaeva, I. Bikmaev, N. Sakhibul lin, E. Irtuganov, R. Zhuchkov, S. Melnikov, A. Galeev, V. Shimansky Investigation of the parameters of two massive X-ray binary systems B. Nizamov, M. Livshits Optical continuum of p owerful solar and stellar flares . . . . . . . . . . L. Oskinova, W.-R. Hamann Moving inhomogeneous envelop es of stars . . . . . . . . . . . . . . . . . Ya. Pavlyuchenkov Molecular line emission in protostellar ob jects . . . . . . . . . . . . . . . N. Petrukhin, E. Pelinovsky, M. Ruderman Reflectionless kink waves in the coronal plasma . . . . . . . . . . . . . .

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H. Pikichyan On linear prop erties of anon-linear problem of radiative transfer . . . M. Pogodin, J.A. Cahuasqui, N. Drake, S. Hubrig, M. Schoel ler, M. Petr-Gotzens, G.A.P. Franco, D.F. Lopes, O. Kozlova, D. Wolff, et al. Signatures of magnetospheric accretion in magnetic Herbig Ae stars K. Postnov, N. Shakura A viscous-convective instability in laminar Keplerian thin discs . . . . K. Postnov, M. Gornostaev, N. Shakura, D. Klochkov, E. Laplas, V. Lukin On the dep endence of the X-ray continuum variations with luminosity in accreting X-ray pulsars . . . . . . . . . . . . . . . . . . . . . . . . . . . . M. Potashov, S. Blinnikov, V. Utrobin The imp ortance of time-dep endent hydrogen ionization in the mo deling of sup ernovae of typ e I IP . . . . . . . . . . . . . . . . . . . . . . . . . . A. Potekhin Atmospheres and radiating surfaces of neutron stars with strong magnetic fields . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I. Potravnov, V. Grinin, D. Mkrtchian, D. Shakhovskoy Accretion and outflow activity on the late phases of PMS evolution. The case of RZ Piscium . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Ju. Poutanen Radiative mechanisms of accreting black holes . . . . . . . . . . . . . . . M. Prokopjeva, Yu. Efimov, V. Il'in Dust in outer layers of B5 globule . . . . . . . . . . . . . . . . . . . . . . . D. Rodionov, A. Belyaev Low-energy inelastic magnesium-hydrogen collisions . . . . . . . . . . . N. Rogovtsov, F. Borovik Applications of General Invariance Relations Reduction Metho d to solutions of radiation transfer problems . . . . . . . . . . . . . . . . . . . . B. Rustamov, Kh. Mikayilov, S. Medzhidova Sp ectral variability of the UX Ori typ e star -- WW Vul . . . . . . . . N. Sakhibul lin, I. Bikmaev Astrophysical investigations based on RTT­150 observations . . . . . S. Salii, S. Parfenov, A. Sobolev The influence of the collision rates improvement on methanol lines estimates of the physical parameters of massive star formation regions. S. Salii, N. Kalinina, S. Parfenov Using improved collision rates mo del for estimations of the physical parameters in the NGC 6334I . . . . . . . . . . . . . . . . . . . . . . . . . I. Savanov Study of cold sp ots on the surface of the stars on to the Kepler space telescop e data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E. Seifina, L. Titarchuk Sp ectral prop erties of NS X-ray binary 4U1705-44 with Bepp oSAX and RXTE. Quasi-constancy of the sp ectral index vs accretion rate . A. Semyannikov Behavior of p erturbations in an accretion flow on to a black hole . . A. Sen, M. Prokopjeva, V. Il'in , N. Voshchinnikov, R. Gupta Interstellar p olarization and star formation studies in dark clouds . .

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N. Shakhvorostova, A. Alakoz, A. Sobolev Estimates of brightness temp eratures and angular sizes for a numb er of maser sources observed by "RadioAstron" . . . . . . . . . . . . . M. Sharina, A. Kniazev, I. Karachentsev, V. Shimansky Age and chemical comp osition of the nuclei of two unusual dwarf spheroidal galaxies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Yu. Shchekinov Metal ejection by galaxies and clusters of galaxies . . . . . . . . . . . . V. Shimansky, N. Sakhibul lin, N. Borisov, M. Sharina, N. Shimanskaya, I. Bikmaev The complex astrophysical systems analysis with use of the stellar atmospheres metho d . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . S. Shirokov Correlation of radial fluctuations in deep galaxy redshift surveys . . . N. Silant'ev, G. Alekseeva, V. Novikov Radiative transfer and sp ectra in sto chastic atmospheres . . . . . . . . T. Sitnova, L. Mashonkina, T. Ryabchikova A non-LTE line formation for neutral and singly-ionised titanium in mo del atmospheres of the reference A­K stars . . . . . . . . . . . . . K. Smirnova, M. Murga, D. Wiebe, A. Sobolev Determining the relationship b etween the comp onents of the interstellar medium in H I I complexes . . . . . . . . . . . . . . . . . . . . . . . A. Sobolev, M.D. Gray, A. Alakoz, H. Imai, J.M. Moran, A. Tolmachev, V. Samodurov, W. Baan, D. Ladeyshchikov Sun-sized masers in Cepheus A . . . . . . . . . . . . . . . . . . . . . . . . D. Sokoloff RM-synthesis: problems and p ersp ectives . . . . . . . . . . . . . . . . . . N. Sudnik, H. Henrichs Stellar prominences to describ e cyclical line profile variability of the O6 sup ergiant Cephei . . . . . . . . . . . . . . . . . . . . . . . . . . . R. Syunyaev Sp ectral distortion of CMB and new results of the satellite "Planck", ground telescop e at the South Pole and Cosmological Telescop e in the Atacama desert . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . L. Tambovtseva, V. Grinin Non-LTE mo dels of the emitting regions in hot young stars . . . . . . A. Tarasov Orbital parameters and variability of the emission sp ectrum massive double system 105 Tau . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A. Tarasov The relative content of the Be stars in the young op en clusters . . . . D. Teplykh The fluctuations of emmission intensity of PSR J0653+8051 at 111 MHz L. Titarchuk, N. Shaposhnikov, E. Seifina X-ray sp ectral index correlations vs mass accretion rate in neutron star and black hole X-ray binaries in their different sp ectral states. Theory vs observations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E. Vasiliev, B. Nath, Yu. Shchekinov Energy budget in multiple sup ernova explosions . . . . . . . . . . . . . E. Vasiliev, M. Ryabova, Yu. Shchekinov Metal ions in circumgalactic medium . . . . . . . . . . . . . . . . . . . . .

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O. Verkhodanov Anomalies of low multip oles of WMAP and Planck missions . . . . . O. Verkhodanov, E. Majorova, O. Zhelenkova, D. Solovyov, M. Kbabibul lina, O. Ulakhovich Faint radio galaxies on the Planck mission maps . . . . . . . . . . . . . T. Viik On the complex Milne problem . . . . . . . . . . . . . . . . . . . . . . . . A. Vikhlinin X-ray observations of galaxy clusters: cosmology and physics of the hot intracluster gas . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A. Vinokurov, S. Fabrika Optical sp ectroscopy of ultra-luminous X-ray sources with BTA . . . Ya. Voronov, A. Belyaev, S. Yakovleva The study of inelastic pro cesses in collisions of b eryllium and hydrogen N. Voshchinnikov, V. Il'in Interstellar p olarization: from UV to submm . . . . . . . . . . . . . . . D. Wiebe Infrared emission of galactic and extragalactic star-forming regions . D. Yakovlev Transp ort prop erties of nuclear pasta in neutron stars . . . . . . . . . S. Yakovleva, A. Belyaev Mo del approach for inelastic pro cesses in collisions of heavy-particles with hydrogen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . V. Yakovleva, O. Merkulova, G. Karataeva, L. Shalyapina, N. Yablokova Galaxies at different stages of interaction . . . . . . . . . . . . . . . . . . V. Yankovsky O2 dayglow atmospheric emissions as tracers for variations of atmospheric comp osition in the mesosphere and low thermosphere . . . . . S. Zaroubi Simulating the Universes ep o ch of reionization . . . . . . . . . . . . . .

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Some structural features of vortices in gravitating gaseous disk
M. Abrahamyan Yerevan Stane University, Armenia mabr4913@gmail.com The linear and non-linear vertical perturbations of rotating gravitating gaseous disc in frame of geostrophic and post-geostrophic approximations are investigated. The structure of mono-pole and solitary dipole vortices (modon)-solutions of obtained equations is studied. Two types of mass distribution in a solitary dipole vortex are received. The first type is characterized by antisymmetrically located counter rotating one round condensation and one rarefaction. The second type is characterized by anti-symmetrically located two condensations and two rarefaction, and a second pair of condensation-rarefaction has a sickle form. Contours of constant density of short-scale dipole vortex match the current lines of vortex; in a gravitating modon the contours of constant density does not coincide with the current lines. The possible applications of monopoly and dipole vortex in astrophysical ob jects have been discussed.

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Atomic data for inelastic pro cesses in low-energy rubidium-hydrogen collisions
Ju. Aikasheva, A. Belyaev, S. Yakovleva Herzen State Pedagogical University, Russia juliaaikasheva@gmail.com Atomic collisions of atoms and positive ions of different chemical elements with hydrogen atoms and negative ions are a main source of uncertainty for nonLTE studies due to high concentrations of hydrogen atoms. Accurte quantum studies are time-consuming and laborous, that's why reliable model aproach is very important. In order to evaluate physically reliable rate constants, the model approach within the framework of the Born-Oppenheimer formalism has been very recently proposed [1,2]. The approach is based on the asymptotic method for electronic structure calculations and multichannel Landau-Zener model for a nonadiabatic nuclear dynamical treatment. In the present study low-energy collisions of rubidium with hydrogen are considered. Electronic structure calculations involved 5 low-lying levels and one ionic. Nonadiabatic transition probabilities between molecular states are calculated by using the multichannel formula based on the Landau-Zener model. Rate coefficients for excitation, de-excitation, ion-pair formation and mutual neutralization processes in rubidium and hydroger collisions are calculated and processes important for astrophysics are defined.
[1] A.K. Belyaev, Phys. Rev. A, 88, 052704 (2013). [2] A.K. Belyaev, S.A. Yakovleva , P.S. Barklem , Astron. Astrophys., 572, A103 (2014).

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Photo electric and collisional charging of dust in protoplanetary disks
V. Akimkin Institute of Astronomy RAS, Russia akimkin@inasan.ru Grain charging in protoplanetary disks and its impact on the dust growth lacks currently a detailed scientific scrutiny. In this work we consider two of the primary mechanisms of the dust charging -- photoelectric effect and collision with electrons and ions. To study the impact of the grain charge on the dust coagulation we solve the Smoluchowski equation locally for typical disk parameters. The collisional charging, which dominates in the disk midplane, leads to electrostatic repulsion between negatively charged grains. This poses a known problem of the electrostatic barrier against dust growth, that significantly hampers dust growth. In the disk atmosphere, where photoelectric charging operates and grains are positively charged, dust retains its initial size distribution both due to low number density and electrostatic repulsion. The most interesting case is at intermediate heights near the zero charge surface, where collisional and photoelectric charging mechanisms are comparable. The presence of both negatively and positively charged grains at the intermediate heights leads to a significant increase in dust coagulation rates, which competes even with coagulation rates in the disk midplane. Such a vertically non-uniform dust evolution affects total available grain surface and UV field distribution, which are of great importance for disk chemistry and appearance.

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Studies of cosmic water and hydroxyl masers within the "RadioAstron" Space-VLBI pro ject
A. Alakoz, A. Sob olev, H. Imai, W. Baan, J. Moran, S. Parfenov and RadioAstron maser team Astro Space Center of Lebedev Physics Institute RAS, Russia alexey.alakoz@gmail.com RadioAstron observations of the cosmic masers led to a number of successful detections in both water and hydroxyl maser transitions. The presence of numerous ultra-compact details shows that implementation of the space-VLBI technique for maser studies is technically possible and is not always prevented by the interstellar scattering, maser beaming and other effects related to formation, transfer and detection of the cosmic maser emission. The first time space-VLBI detections of cosmic water maser emission have been obtained for the Megamaser galaxy NGC 4258 and various star forming regions of the Galaxy. The sharpest "direct" linear resolution of better than 4 million kilometers has been achieved in observations of the water maser in Orion. Water masers in W49N were detected on baselines exceeding 9.5 Earth Diameters, which corresponds to the ultra-high angular resolution of about 23 microarcsec.

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The nature of long-term sp ectral variability of IN Com
I. Alekseev, O. Kozlova Crimean Astrophysical Observatory, Russia ilya-alekseev@mail.ru We are presented long-term spectral observations (R = 20000) of IN Com in the region of H , H and He I 5876 lines. The distinguishing character of stellar spectrum is the presence in the H line the extended two-component emission with limits reached ±400 km/s. Emission parameters show the rotation modulation with the stellar rotation period and a significant variability on the long-term scale. Similar emission is observed also in H and He I 5876 lines. Our results allow to conclude that observational emission profiles are formed in optically thin hot gas. It is a result of presence around IN Com circumstellar gas disk. Its size is not exceed some stellar radii. The material for the disk is supported by IN Com stellar wind. The found variability of H emission parameters shows evident connection with photopolarimetric activity of the star. This fact allows us to connect the long-term spectral variability with cycles of stellar activity of IN Com.

Radiation mechanisms of astrophysical objects: classics today


Sobolev-100 Conference, St.Petersburg State University, 2015

13

The non-lo cal thermo dynamic equilibrium (NLTE) line formation of C I ­ C I I in the A- and late B-typ e stars
S. Alexeeva Institute of Astronomy RAS, Russia alexeeva@inasan.ru Classical LTE analysis finds a discrepancy in abundances determined from different lines of C I, as well as a violation of the ionization equilibrium between C I and C II in the atmospheres of A and late B type stars. We present a new comprehensive model atom for C I ­ C II designed to investigate line formation for C I and C II based on the non-local thermodynamic equilibrium (NLTE). As a first application of the C I ­ C II model atom, carbon abundances are determined on the basis of classical plane-parallel model atmospheres for Vega (A0 V), HD 73666, 21 Peg, and Cet that show no obvious sign of chemical peculiarity. Cet shows a emission lines in the near-infrared spectral region (8335 ° and A 9405 ° We show that the C I emission lines are explained by NLTE effects but A). not the circumstellar disk. The NLTE analysis helps to achieve the ionization equilibrium between C I and C II in the atmospheres of A and late B type stars for the presented stars.

Radiation mechanisms of astrophysical objects: classics today


Sobolev-100 Conference, St.Petersburg State University, 2015

14

Dynamics of wind and variations of circumstellar extinction in the classical T Tauri star RY Tau
E. Babina, S. Artemenko, P. Petrov Crimean Astrophysical Observatory, Russia helenka truth@mail.ru RY Tau is a pre-main sequence star with accretion disc. With the spectral type G2 and stellar mass of 2 M it drops in between the Classical T Tauri stars and the Herbig Ae stars. Light variability of RY Tau is mostly due to variable circumstellar extinction, because the line of sight lies near to the disc plane. From the highly variable H and NaI D line profiles we identified magnetospheric accretion flows, disc wind, and events of fast outflows (P Cyg profile), which are probably a coronal mass ejection following the magnetosphere inflation. For the first time it is found that the circumstellar extinction is tightly related to the wind: extinction gets lower at higher velocity of the wind. We suggest that the coronal mass ejection events modify the dusty disk wind within 0.3 AU from the star, and temporarily clear up the line of sight from the dust particles.

Radiation mechanisms of astrophysical objects: classics today


Sobolev-100 Conference, St.Petersburg State University, 2015

15

Molecular hydrogen absorption systems at high redshifts
S. Balashev, D. Varshalovich, A. Ivanchik, V. Klimenko Ioffe Physical-Technical Institute RAS, Russia s.balashev@gmail.com Molecular hydrogen absorption systems are corresponded to the cold phase of interstellar medium of the galaxies in the early Universe. They are detected in the quasar spectra and found to be associated with the Damped L systems. We present a small review of studies of H2 absorption systems and focus on recent progress that was done by our group, namely: (i) the search of H2 absorption systems in SDSS quasar spectra; (ii) the measurement of neutral chlorine abundance in all known H2 absorption systems at high redshifts (z = 2 В 4); (iii) the study of ultra high H2 column density absorption system at z = 2.7865 in spectrum of J0843+0221.

Radiation mechanisms of astrophysical objects: classics today


Sobolev-100 Conference, St.Petersburg State University, 2015

16

Sp ectral distortions of the CMB dip ole
S. Balashev, E. Kholup enko, J. Chluba, A. Ivanchik, D. Varshalovich Ioffe Physical-Technical Institute RAS, Russia s.balashev@gmail.com We consider the distortions of the CMB dipole anisotropy related to the primordial recombination radiation (PRR) and primordial y - and µ-distortions. The signals arise due to our motion relative to the CMB restframe and appear as a frequency-dependent distortion of the CMB temperature dipole. To leading order, the expected relative distortion of CMB dipole does not depend on the particular observation directions and reaches the level of 10-6 for the PRR- and µ-distortions and 10-5 for the y -distortion in the frequency range 1 В 700 GHz. The temperature differences arising from the dipole anisotropy of the relic CMB distortions depend on observation directions. For mutually opposite directions, collinear to the CMB dipole axis, the temperature differences because of the PRRand µ-dipole anisotropy attain values T 10 nK in the considered range. The temperature difference arising from the y -dipole anisotropy may reach values up to 1 µK. The key features of the considered eff