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: http://www.astro.spbu.ru/staff/afk/Papers/2007/rhoLeo2007abstr.html
Дата изменения: Fri Nov 19 16:09:21 2010 Дата индексирования: Tue Oct 2 03:57:07 2012 Кодировка: Поисковые слова: zodiacal light |
We observed the bright supergiant $\rho\,$Leo B1Ib in January-February 2004 using the 6-m telescope of the Special Astrophysical Observatory (Russia) and the 1.8-m telescope of the Bohyunsan Optical Astronomy Observatory (South Korea). 47 spectra with high time resolution (4-10 min), signal-to- noise ratios 300-1000, and spectral resolutions R = 4500 - 60000 were obtained. We detected variability in the HeI, SiII, SiIII, and NII line profiles, which may be due to rotational modulation of the profiles and photospheric pulsations of $\rho\,$Leo. The possible influence of the stellar magnetic field on the line-profile variations is discussed.