2070 unique, homogeneous photometric and polarization observations of the microquasar in a binary system with a black hole V404 Cyg/GS2023+338 obtained in 2015 with the MASTER global network of robotic telescopes (16 robotic telescopes located at eight points on the Earth in Russia, Spain, South Africa, and Argentina) are presented. MASTER was the first telescope network to obtain optical observations of the microquasar after its gamma-ray outburst in 2015. Observations were carried out from 18:34:09 UT on June 15, 2015 until December 2015 in four polarizations and in the four standard BV RI filters. The paper presents the results of these observations and a comparative analysis of optical and X-ray data. The observations confirm the previously discovered super-long delays of the optical radiation relative to the X-ray outbursts. Possible mechanisms causing the delay in the optical variations relative to the X-ray variations are discussed. Variability of the optical polarization discovered earlier is confirmed another similar episode reported.
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In the last four years we have carried out a number of studies on the radiative and collisional processes in theA
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state of CN. Many of these of interest to those studying planetary atmospheres, comets and solar spectra are summarized in this paper. Data for CNA
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fluorescence lifetimes and quenching rates, and collisional energy transfer between CNA
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andX
2+ are reported. Detailed comparisons and a discussion of the results may be found in several already published papers. 相似文献
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Measurements from the 1225 to 1340 Å region by the ultraviolet detectors on Mars-3 are presented. Model calculations of the intensity of the OI triplet lines at 1304 Å are compared with the measurements made on December 27, 1971, and February 17, 1972. Agreement is found between experimental data and a model in which the neutral oxygen density at 100 km is 2–8 × 109 cm?3. 相似文献
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L. G. Titarchuk 《Astrophysics and Space Science》1975,35(1):137-149
The scattered radiation field in homogeneously absorbing and isotropically scattering spherical layers is studied, when the isotropic point source is at the centre. A complete frequency redistribution is assumed. It is shown, that on the inner boundaryr=R 0 of the cavity, whenR 0?1 (all radii are expressed in the path lengths), the source functionB～R 0 ?1 ln ?1/2 R 0 for the Doppler profile andB～R 0 ?3/2 for the Voigt and Lorentz profiles. The asymptotical behaviour of the source functionB(r) significantly differs from the analogous behaviour of solution for an infinite medium. 相似文献
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L. G. Titarchuk 《Astrophysics》1988,29(2):634-644
Institute of Cosmic Research, USSR Academy of Sciences. Translated from Astrofizika, Vol. 29, No. 2, pp. 369–384, September–October, 1988. 相似文献
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Lipunov V. M. Kuznetsov A. S. Gorbovskoy E. S. Kornilov V. G. Tyurina N. V. Vladimirov V. V. Krushinskiy V. V. Zalozhnykh I. S. Vlasenko D. M. Zimnukhov D. S. Balanutsa P. V. Gabovich A. Shakura N. I. Giovanelli F. Titarchuk L. G. Buckley D. A. H. Gress O. Budnev N. Rebolo R. Serra-Ricart M. Tlatov A. G. Senik V. A. Yurkov V. V. Ershova O. Grinshpun V. G. Ishmukhametova Yu. V. 《Astronomy Reports》2019,63(7):534-549
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