Microvariability of line profiles in the spectra of OB stars: III. The supergiant ρ LEO

Details Microvariability of line profiles in the spectra of OB stars: III. The supergiant ρ LEO Microvariability of line profiles in the spectra of OB stars: III. The supergiant ρ LEO

Nov 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007arep...51..920k&link_type=abstract

Astronomy Reports, Volume 51, Issue 11, pp.920-931

Astronomy and Astrophysics

Astronomy

1

97.20.Pm, 95.85.Kr, 97.10.Sj

Scientific paper

We observed the bright supergiant ρ Leo (B1 lab) 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 45 000-60 000 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 ρ Leo. The possible influence of the stellar magnetic field on the line-profile variations is discussed.

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