Zobrazeno 1 - 10
of 320
pro vyhledávání: '"S. Fabrika"'
Autor:
A., Sarkisyan, A., Vinokurov, Yu., Solovyeva, K., Atapin, O., Sholukhova, S., Fabrika, D, Bizyaev
We study the luminous blue variable candidate J004229.87+410551.8 in the Andromeda Galaxy. Earlier, the star displayed a spectral anomaly: although a hot emission spectrum had been detected, it had strong CaII H and K absorption lines. Subsequently t
Externí odkaz:
http://arxiv.org/abs/2210.13342
Autor:
G. Valyavin, G. Beskin, A. Valeev, G. Galazutdinov, S. Fabrika, V. Aitov, O. Yakovlev, A. Ivanova, R. Baluev, V. Vlasyuk, Inwoo Han, S. Karpov, V. Sasyuk, A. Perkov, S. Bondar, F. Musaev, E. Emelianov, T. Fatkhullin, S. Drabek, V. Shergin, Byeong-Cheol Lee, G. Mitiani, T. Burlakova, M. Yushkin, E. Sendzikas, D. Gadelshin, L. Chmyreva, A. Beskakotov, V. Dyachenko, D. Rastegaev, A. Mitrofanova, I. Yakunin, K. Antonyuk, V. Plokhotnichenko, A. Gutaev, N. Lyapsina, V. Chernenkov, A. Biryukov, E. Ivanov, A. Belinsky, E. Sokov, A. Tavrov, O. Korablev, Myeong-Gu Park, V. Stolyarov, V. Bychkov, S. Gorda, A. Popov, A. Sobolev
Publikováno v:
Astrophysical Bulletin. 77:495-508
Autor:
Y Solovyeva, A Vinokurov, N Tikhonov, A Kostenkov, K Atapin, A Sarkisyan, A Moiseev, S Fabrika, D Oparin, A Valeev
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 518:4345-4356
We continue the search for luminous blue variables (LBVs) in Local Volume galaxies in order to study their fundamental parameters. In this paper, we report the discovery of two new LBVs in the dwarf irregular galaxy NGC 1156. Both stars exhibit spect
Publikováno v:
Odessa Astronomical Publications, Vol 18, Iss 0, Pp 135-137 (2017)
We shortly present intermidiate results of a survey for weak magnetic fields among degenerate stars (white dwarfs and hot subdwarf stars). Kilogauss upper limits of longitudinal magnetic fields are presented for several brightest DA white dwarfs and
Externí odkaz:
https://doaj.org/article/2b65b955a699486fa8dc8170f1f8475e
Publikováno v:
Proceedings of The Multifaceted Universe: Theory and Observations - 2022 — PoS(MUTO2022).
Autor:
Petko Nedialkov, D. V. Oparin, A. Sarkisyan, A. Kostenkov, D. V. Bizyaev, A. F. Valeev, K. Atapin, O. I. Spiridonova, S. Fabrika, Y. Solovyeva, Alexander Vinokurov
We continue to search for LBV stars in galaxies outside the Local Group. In this work, we have investigated four luminous stars in NGC 4449. Multiple spectral observations carried out for J122810.94+440540.6, J122811.70+440550.9, and J122809.72+44051
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a81d740dac36e222276be88c978277cf
http://arxiv.org/abs/2208.05892
http://arxiv.org/abs/2208.05892
Publikováno v:
Astrophysical Bulletin. 76:6-38
Ultraluminous X-ray sources (ULXs) were identified as a separate class of objects in 2000 based on data from the Chandra X-Ray Observatory. These are unique objects: their X-ray luminosities exceed the Eddington limit for a typical stellar-mass black
Publikováno v:
ASTRONOMY AT THE EPOCH OF MULTIMESSENGER STUDIES. Proceedings of the VAK-2021 conference, Aug 23–28, 2021.
We report the discovery of a cyclotron resonant scattering feature (CRSF) in the ultraluminous X-ray source (ULX)NGC5474 X-1 that makes it the third ULX with a CRSF. Cyclotron lines arise in strong magnetic fields, which requiresthe object to be a n
Autor:
A. F. Valeev, A. Y. Kniazev, K. Atapin, Alexander Vinokurov, S. Fabrika, A. Sarkisyan, Olga Sholukhova, Y. Solovyeva, O. Maslennikova
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 497:4834-4842
We search for LBV stars in galaxies outside the Local Group. Here we present a study of two bright $H\alpha$ sources in the NGC 247 galaxy. Object j004703.27-204708.4 ($M_V=-9.08 \pm 0.15^m$) shows the spectral lines typical for well-studied LBV star
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