98 citations · 366 across the 14 of their papers we have counts for
14 papers
On the spatial distribution of luminous blue variables in the M33 galaxy
A. Kostenkov, S. Fabrika, A. Kaldybekova +6
In the current paper, we present a study of the spatial distribution of luminous blue variables (LBVs) and various LBV candidates (cLBVs) with respect to OB associations in the M33…
Discovery of An X-ray Photoionized Optical Nebula and A Radio Nebula Associated with the ULX NGC 4861 X-1
Hang Gong, Ryan Urquhart, Alexandr Vinokurov +5
We have conducted long-slit spectroscopic observations and analyzed archival radio data for the ultraluminous X-ray source (ULX) NGC 4861 X-1. Our spectral line analysis unveils th…
Exoplanet two square degree survey with SAO RAS robotic facilities
O. Ya. Yakovlev, A. F. Valeev, G. G. Valyavin +15
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 o…
Photometric and spectroscopic analysis of LBV candidate J004341.84+411112.0 in M31
A. Sarkisyan, O. Sholukhova, S. Fabrika +4
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. Th…
Modeling of extended atmospheres with temperatures below 40000K
A. Kostenkov, A. Vinokurov, Y. Solovyeva +2
We calculate models of extended stellar atmospheres with a temperature in the range of 12000-40000K and a mass loss rate of yr. A large number of…
NuSTAR and Swift observations of the ultraluminous X-ray source IC 342 X-1 in 2016: witnessing spectral evolution
Megumi Shidatsu, Yoshihiro Ueda, Sergei Fabrika
We report on an X-ray observing campaign of the ultraluminous X-ray source IC 342 X-1 with NuSTAR and Swift in 2016 October, in which we captured the very moment when the source sh…