73 citations · 405 across the 31 of their papers we have counts for
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Optical And X-ray Variability Of γ Cas Stars: Sao 49725
A. F. Kholtygin, I. Ya. Yakunin, V. S. Bukharinov +3
The present paper is devoted to studying the variability of the Cas type star SAO 49725. Both the optical and X-ray spectra of the star are analyzed. Variability of line profil…
Superfast Line Profile Variations in the Spectra of OBA Stars III: A0 Star CVn, New Results
A. F. Kholtygin, A. V. Moiseeva, I A. Yakunin +1
This work is a continuation of the studies of the ultrafast variability of line profiles in the spectra of early-type stars. Line profile variations (LPVs) in the spectrum a chemic…
A short and sudden increase of the magnetic field strength and the accompanying spectral variability in the O9.7V star HD54879
S. Hubrig, M. Kueker, S. P. Jarvinen +4
Only eleven O-type stars have been confirmed to possess large-scale organized magnetic fields. The presence of a -600G longitudinal magnetic field in the O9.7V star HD54879 with a…
Studying the presence of magnetic fields in a sample of high-mass X-ray binaries
Swetlana Hubrig, Alexander F. Kholtygin, Lara Sidoli +2
Previous circular polarization observations obtained with the ESO FOcal Reducer low dispersion spectrograpgh at the VLT in 2007-2008 revealed the presence of a weak longitudinal ma…
Detection of a centrifugal magnetosphere in one of the most massive stars in the Oph star-forming cloud
S. Hubrig, M. Schöller, S. P. Järvinen +3
Recent XMM-Newton observations of the B2 type star rho Oph A indicated a periodicity of 1.205d, which was ascribed to rotational modulation. Since variability of X-ray emission in…
A search for the presence of magnetic fields in the two Supergiant Fast X-ray Transients IGR J08408-4503 and IGR J11215-5952
S. Hubrig, L. Sidoli, K. Postnov +4
A significant fraction of high-mass X-ray binaries are supergiant fast X-ray transients (SFXTs). The prime model for the physics governing their X-ray behaviour suggests that the w…