Email this article Super-Fast Line-Profile Variability in the Spectra of OBA-Stars: B1-Star ρ Leo
- Authors: Kholtygin A.F.1, Batrakov A.A.1, Fabrika S.N.2, Valeev A.F.2, Tumanova I.M.1, Tsiopa O.A.3
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Affiliations:
- St. Petersburg State University
- Special Astrophysical Observatory
- Pulkovo astronomical observatory of the Russian Academy of Sciences
- Issue: Vol 73, No 4 (2018)
- Pages: 471-477
- Section: Article
- URL: https://journal-vniispk.ru/1990-3413/article/view/212806
- DOI: https://doi.org/10.1134/S1990341318040107
- ID: 212806
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Abstract
This study continues our investigation of the super-fast variability of line profiles in the spectra of early-type stars. We have investigated the line-profile variability in spectra of OBA-stars with the SCORPIO multi-mode focal reducer mounted at the 6-m SAO RAS telescope. Regular short-period variations of the H and He lines in the spectra of the B1I star ρ Leo were detected with periods ranging from 2 to 90 minutes, as well as irregular line-profile variations on time intervals less than 1 minute. A possible origin of rapid spectral variations is discussed.
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About the authors
A. F. Kholtygin
St. Petersburg State University
Author for correspondence.
Email: afkholtygin@gmail.com
Russian Federation, St. Petersburg, 198504
A. A. Batrakov
St. Petersburg State University
Email: afkholtygin@gmail.com
Russian Federation, St. Petersburg, 198504
S. N. Fabrika
Special Astrophysical Observatory
Email: afkholtygin@gmail.com
Russian Federation, Nizhnii Arkhyz, 369167
A. F. Valeev
Special Astrophysical Observatory
Email: afkholtygin@gmail.com
Russian Federation, Nizhnii Arkhyz, 369167
I. M. Tumanova
St. Petersburg State University
Email: afkholtygin@gmail.com
Russian Federation, St. Petersburg, 198504
O. A. Tsiopa
Pulkovo astronomical observatory of the Russian Academy of Sciences
Email: afkholtygin@gmail.com
Russian Federation, St. Petersburg, 196140
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