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

Autor:	A. A. Batrakov, Alexander F. Kholtygin, S. N. Fabrika, A. F. Valeev, A. Kostenkov, O. A. Tsiopa
Rok vydání:	2020
Předmět:	Physics Astronomy and Astrophysics Windowed fourier transform Astrophysics::Cosmology and Extragalactic Astrophysics Astrophysics Star (graph theory) Stellar classification 01 natural sciences Spectral line law.invention Telescope 03 medical and health sciences Stars 0302 clinical medicine law 030225 pediatrics 0103 physical sciences Astrophysics::Solar and Stellar Astrophysics 010303 astronomy & astrophysics Instrumentation Line (formation)
Zdroj:	Astrophysical Bulletin. 75:278-283
ISSN:	1990-3421 1990-3413
Popis:	—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.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::0405669e4ca2b8a7737b6eae9abf3c3c https://doi.org/10.1134/s1990341320030074 Zobrazit plný text záznamu Plný text ve formátu PDF Plný text ve formátu HTML
Nepřihlášeným uživatelům se plný text nezobrazuje	K zobrazení výsledku je třeba se přihlásit.