Article

Astronomy Reports

, Volume 51, Issue 11, pp 920-931

First online:

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

  • A. F. KholtyginAffiliated withSobolev Astronomical Institute, St. Petersburg State University
  • , S. N. FabrikaAffiliated withSpecial Astrophysical Observatory, Russian Academy of Sciences
  • , T. E. BurlakovaAffiliated withSpecial Astrophysical Observatory, Russian Academy of SciencesBohyunsan Optical Astronomy Observatory
  • , G. G. ValyavinAffiliated withSpecial Astrophysical Observatory, Russian Academy of SciencesBohyunsan Optical Astronomy Observatory
  • , G. A. ChuntonovAffiliated withSpecial Astrophysical Observatory, Russian Academy of Sciences
  • , D. O. KudryavtsevAffiliated withSpecial Astrophysical Observatory, Russian Academy of Sciences
  • , D. KangAffiliated withBohyunsan Optical Astronomy Observatory
  • , M. V. YushkinAffiliated withSpecial Astrophysical Observatory, Russian Academy of Sciences
  • , G. A. GalazutdinovAffiliated withSpecial Astrophysical Observatory, Russian Academy of SciencesKorea Astronomy and Space Science Institute

Rent the article at a discount

Rent now

* Final gross prices may vary according to local VAT.

Get Access

Abstract

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.

PACS numbers

97.20.Pm 95.85.Kr 97.10.Sj