Zobrazeno 1 - 10
of 411
pro vyhledávání: '"Fabrika, S"'
Autor:
Yakovlev, O. Ya., Valeev, A. F., Valyavin, G. G., Aitov, V. N., Mitiani, G. Sh., Fatkhullin, T. A., Beskin, G. M., Tavrov, A. V., Korablev, O. I., Galazutdinov, G. A., Vlasyuk, V. V., Emelianov, E. V., Sasyuk, V. V., Perkov, A. V., Bondar, S. F., Burlakova, T. E., Fabrika, S. N., Romanyuk, I. I.
We present a catalog of 150 variable stars, including 13 stars with exoplanet candidates. 37 stars were identified as variables for the first time. As a result of a 2.5-year photometric survey of exoplanets, we have obtained and analyzed light curves
Externí odkaz:
http://arxiv.org/abs/2404.10027
Autor:
Yakovlev, O. Ya., Valeev, A. F., Valyavin, G. G., Tavrov, A. V., Aitov, V. N., Mitiani, G. Sh., Beskin, G. M., Vlasyuk, V. V., Korablev, O. I., Galazutdinov, G. A., Emelianov, E. V., Fatkhullin, T. A., Sasyuk, V. V., Perkov, A. V., Bondar, S. F., Burlakova, T. E., Fabrika, S. N., Romanyuk, I. I.
Here we present eight new candidates for exoplanets detected by the transit method at the Special Astrophysical Observatory of the Russian Academy of Sciences. Photometric observations were performed with a 50-cm robotic telescope during the second h
Externí odkaz:
http://arxiv.org/abs/2304.01076
Autor:
Solovyeva, Y., Vinokurov, A., Sarkisyan, A., Kostenkov, A., Atapin, K., Fabrika, S., Oparin, D., Valeev, A., Bizyaev, D., Nedialkov, P., Spiridonova, O.
Publikováno v:
Monthly Notices of the Royal Astronomical Society, Volume 507, Issue 3, pp.4352-4366, 2021
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:
http://arxiv.org/abs/2208.05892
Autor:
Solovyeva, Y., Vinokurov, A., Tikhonov, N., Kostenkov, A., Atapin, K., Sarkisyan, A., Moiseev, A., Fabrika, S., Oparin, D., Valeev, A.
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
Externí odkaz:
http://arxiv.org/abs/2208.05858
Autor:
Yakovlev, O. Ya., Valeev, A. F., Valyavin, G. G., Tavrov, A. V., Aitov, V. N., Mitiani, G. Sh., Korablev, O. I., Galazutdinov, G. A., Beskin, G. M., Emelianov, E. V., Fatkhullin, T. A., Vlasyuk, V. V., Sasyuk, V. V., Perkov, A. V., Bondar, S., Burlakova, T. E., Fabrika, S. N., Romanyuk, I. I.
We used the 0.5-m robotic telescopes located at the Special Astrophysical Observatory of the Russian Academy of Sciences for monitoring two square degrees of the sky with the aim of detecting new exoplanets. A dimming of the visible brightness is exp
Externí odkaz:
http://arxiv.org/abs/2206.06030
Autor:
Vinokurov, A., Atapin, K., Bordoloi, O. P., Sarkisyan, A., Kashyap, U., Chakraborty, M., Rahna, P. T., Kostenkov, A., Solovyeva, Y., Fabrika, S., Safonova, M., Gogoi, R., Sutaria, F., Murthy, J.
We present the results of 8 epochs of simultaneous UV and X-ray observations of the highly variable ultraluminous X-ray source (ULX) Holmberg II X-1 with AstroSat -- Indian multiwavelength space satellite. During the entire observation period from la
Externí odkaz:
http://arxiv.org/abs/2205.05204
Autor:
Sarkisyan, A., Sholukhova, O., Fabrika, S., Valeev, A., Valcheva, A., Nedialkov, P., Tatarnikov, A.
We study Luminous Blue Variable (LBV) candidate J004341.84+411112.0 in the Andromeda galaxy. We present optical spectra of the object obtained with the 6-m telescope of SAO RAS. The candidate shows typical LBV features in its spectra: broad and stron
Externí odkaz:
http://arxiv.org/abs/2111.09148
Autor:
Minev, M., Ivanov, V. D., Trifonov, T., Ovcharov, E., Fabrika, S., Sholukhova, O., Vinokurov, A., Valcheva, A., Nedialkov, P.
We report here the first results from a 15-yr long variability monitoring of the z=2.0 quasar QSO B1312+7837. It shows luminosity changes with a period P~6.13 yr (P~2.04 yr at rest frame) and an amplitude of ~0.2mag, superimposed on a gradual dimming
Externí odkaz:
http://arxiv.org/abs/2109.13817
Publikováno v:
Astrophysical Bulletin, 2021, V. 76, N. 1, pp. 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
Externí odkaz:
http://arxiv.org/abs/2105.10537
Publikováno v:
MNRAS 496(2020) 5455-5462
MN112 is the Galactic luminous blue variable (LBV) candidate with circumstellar nebula. P Cygni is the first discovered LBV, which was recorded during major eruptions in the 17th century. The stars have similar spectra with strong emission hydrogen l
Externí odkaz:
http://arxiv.org/abs/2009.13463