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Super-Fast Line-Profile Variability in the Spectra of OBA Stars. II. A0 Star α2 CVn

Super-Fast Line-Profile Variability in the Spectra of OBA Stars. II. A0 Star α2 CVn —This study continues the investigation of the super-fast variability of line profiles in the spectra of stars of early spectral classes performed in 2017 and 2018. We investigated the variability of line profiles in the spectra of OBA stars with the SCORPIO multi-mode focal reducer at the 6-m SAO RAS telescope (BTA). Short-period regular variations of the H and He lines were detected in the spectra of the chemically peculiar A0Vp star α2 CVn with periods ranging from approximately 30 to 135 minutes. Using the windowed Fourier transform let us detect the transient quasi-regular variations in the Balmer-line profiles with periods of 3–6 minutes. We discuss a possible origin of fast spectral variations. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Astrophysical Bulletin Springer Journals

Super-Fast Line-Profile Variability in the Spectra of OBA Stars. II. A0 Star α2 CVn

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References (17)

Publisher
Springer Journals
Copyright
Copyright © Pleiades Publishing, Ltd. 2020
ISSN
1990-3413
eISSN
1990-3421
DOI
10.1134/S1990341320030074
Publisher site
See Article on Publisher Site

Abstract

—This study continues the investigation of the super-fast variability of line profiles in the spectra of stars of early spectral classes performed in 2017 and 2018. We investigated the variability of line profiles in the spectra of OBA stars with the SCORPIO multi-mode focal reducer at the 6-m SAO RAS telescope (BTA). Short-period regular variations of the H and He lines were detected in the spectra of the chemically peculiar A0Vp star α2 CVn with periods ranging from approximately 30 to 135 minutes. Using the windowed Fourier transform let us detect the transient quasi-regular variations in the Balmer-line profiles with periods of 3–6 minutes. We discuss a possible origin of fast spectral variations.

Journal

Astrophysical BulletinSpringer Journals

Published: Jul 22, 2020

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