Variability of Balmer Profiles in Magnetic Ap/Bp Stars

Gennady G. Valyavin, Byeong-Cheol Lee, Denis Victorovich Shulyak, Inwoo Han, Oleg Kochukhov, D. Khang, Kang-Min Kim

Veröffentlichungen: Beitrag in BuchBeitrag in Konferenzband

Abstract

A set of high precision measurements of weak variations of hydrogen lines in spectra of seven magnetic Ap/Bp stars was carried out using the BOES echelle spectrograph of the Bohuynsan Optical Astronomy Observatory (South Korea). A weak (1-2 %) periodic variability of the Balmer line wings has been detected in the spectra of 2 program stars. Upper limits of possible variations are presented for the remaining 5 objects. We discuss the discovered variability in the framework of model atmospheres with magnetic force terms included. The periodic changes in the Balmer profiles are caused by perturbations in atmospheres of Ap/Bp stars due to their rotationally modulated non-force-free magnetic fields.
OriginalspracheEnglisch
TitelThe Seventh Pacific RIM Conference on Stellar Astrophysics
Untertitelproceedings of a workshop held at Sejong University, Seoul, Korea, 1-5 November 2005
Redakteure*innenYoung Woon Kang
ErscheinungsortSan Francisco
Herausgeber (Verlag)Astronomical Society of the Pacific
Seiten245
ISBN (Print)978-1-58381-230-3
PublikationsstatusVeröffentlicht - 2007

Publikationsreihe

ReiheAstronomical Society of the Pacific Conference Series
Band362
ISSN1050-3390

ÖFOS 2012

  • 103003 Astronomie

Zitationsweisen