Kholtygin A.F., Fabrika S.N., Burlakova T.E., Valyavin G.G., Chuntonov G.A., Kudryavtsev D.O., Kang Dong-il, Yushkin M.V., Galazutdinov G.A.
Microvariability of Line Profiles in the Spectra of OB stars III. Supergiant rho Leo
Astronomy Reports, 51, 920-931 (2007)     
Original Russian Text are published in Astronomicheskii Zhurnal, 84, No. 11, pp. 1016-1028 (2007)

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.