Astronomy Reports

, Volume 51, Issue 11, pp 920–931

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

  • A. F. Kholtygin
  • S. N. Fabrika
  • T. E. Burlakova
  • G. G. Valyavin
  • G. A. Chuntonov
  • D. O. Kudryavtsev
  • D. Kang
  • M. V. Yushkin
  • G. A. Galazutdinov
Article

DOI: 10.1134/S1063772907110054

Cite this article as:
Kholtygin, A.F., Fabrika, S.N., Burlakova, T.E. et al. Astron. Rep. (2007) 51: 920. doi:10.1134/S1063772907110054

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.Pm95.85.Kr97.10.Sj

Copyright information

© Pleiades Publishing, Ltd. 2007

Authors and Affiliations

  • A. F. Kholtygin
    • 1
  • S. N. Fabrika
    • 2
  • T. E. Burlakova
    • 2
    • 3
  • G. G. Valyavin
    • 2
    • 3
  • G. A. Chuntonov
    • 2
  • D. O. Kudryavtsev
    • 2
  • D. Kang
    • 3
  • M. V. Yushkin
    • 2
  • G. A. Galazutdinov
    • 2
    • 4
  1. 1.Sobolev Astronomical InstituteSt. Petersburg State UniversityPetrodvoretsRussia
  2. 2.Special Astrophysical ObservatoryRussian Academy of SciencesNizhniĭ Arkhyz, Karachaĭ-Cherkessian RepublicRussia
  3. 3.Bohyunsan Optical Astronomy ObservatoryKyung-pookSouth Korea
  4. 4.Korea Astronomy and Space Science InstituteDaejeonKorea