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

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

Institut für Astrophysik

Veröffentlichungen: Beitrag in Buch › Beitrag 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.

Originalsprache	Englisch
Titel	The Seventh Pacific RIM Conference on Stellar Astrophysics
Untertitel	proceedings of a workshop held at Sejong University, Seoul, Korea, 1-5 November 2005
Redakteure*innen	Young Woon Kang
Erscheinungsort	San Francisco
Herausgeber (Verlag)	Astronomical Society of the Pacific
Seiten	245
ISBN (Print)	978-1-58381-230-3
Publikationsstatus	Veröffentlicht - 2007

Publikationsreihe

Reihe	Astronomical Society of the Pacific Conference Series
Band	362
ISSN	1050-3390

ÖFOS 2012

103003 Astronomie

Andere Dateien und Links

http://adsabs.harvard.edu//abs/2007ASPC..362..245V

Zitationsweisen

Valyavin, G. G., Lee, B.-C., Shulyak, D. V., Han, I., Kochukhov, O., Khang, D., & Kim, K.-M. (2007). Variability of Balmer Profiles in Magnetic Ap/Bp Stars. in Y. W. Kang (Hrsg.), The Seventh Pacific RIM Conference on Stellar Astrophysics: proceedings of a workshop held at Sejong University, Seoul, Korea, 1-5 November 2005 (S. 245). Astronomical Society of the Pacific.

Valyavin, Gennady G. ; Lee, Byeong-Cheol ; Shulyak, Denis Victorovich et al. / Variability of Balmer Profiles in Magnetic Ap/Bp Stars. The Seventh Pacific RIM Conference on Stellar Astrophysics: proceedings of a workshop held at Sejong University, Seoul, Korea, 1-5 November 2005. Hrsg. / Young Woon Kang. San Francisco : Astronomical Society of the Pacific, 2007. S. 245 (Astronomical Society of the Pacific Conference Series, Band 362).

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title = "Variability of Balmer Profiles in Magnetic Ap/Bp Stars",

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.",

author = "Valyavin, {Gennady G.} and Byeong-Cheol Lee and Shulyak, {Denis Victorovich} and Inwoo Han and Oleg Kochukhov and D. Khang and Kang-Min Kim",

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Valyavin, GG, Lee, B-C, Shulyak, DV, Han, I, Kochukhov, O, Khang, D & Kim, K-M 2007, Variability of Balmer Profiles in Magnetic Ap/Bp Stars. in YW Kang (Hrsg.), The Seventh Pacific RIM Conference on Stellar Astrophysics: proceedings of a workshop held at Sejong University, Seoul, Korea, 1-5 November 2005. Astronomical Society of the Pacific, San Francisco, Astronomical Society of the Pacific Conference Series, Bd. 362, S. 245.

Variability of Balmer Profiles in Magnetic Ap/Bp Stars. / Valyavin, Gennady G.; Lee, Byeong-Cheol; Shulyak, Denis Victorovich et al.
The Seventh Pacific RIM Conference on Stellar Astrophysics: proceedings of a workshop held at Sejong University, Seoul, Korea, 1-5 November 2005. Hrsg. / Young Woon Kang. San Francisco: Astronomical Society of the Pacific, 2007. S. 245 (Astronomical Society of the Pacific Conference Series, Band 362).

Veröffentlichungen: Beitrag in Buch › Beitrag in Konferenzband

TY - GEN

T1 - Variability of Balmer Profiles in Magnetic Ap/Bp Stars

AU - Valyavin, Gennady G.

AU - Lee, Byeong-Cheol

AU - Shulyak, Denis Victorovich

AU - Han, Inwoo

AU - Kochukhov, Oleg

AU - Khang, D.

AU - Kim, Kang-Min

N1 - Publication start page : 245

PY - 2007

Y1 - 2007

N2 - 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.

AB - 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.

UR - http://adsabs.harvard.edu//abs/2007ASPC..362..245V

M3 - Contribution to proceedings

SN - 978-1-58381-230-3

T3 - Astronomical Society of the Pacific Conference Series

SP - 245

BT - The Seventh Pacific RIM Conference on Stellar Astrophysics

A2 - Kang, Young Woon

PB - Astronomical Society of the Pacific

CY - San Francisco

ER -

Valyavin GG, Lee BC, Shulyak DV, Han I, Kochukhov O, Khang D et al. Variability of Balmer Profiles in Magnetic Ap/Bp Stars. in Kang YW, Hrsg., The Seventh Pacific RIM Conference on Stellar Astrophysics: proceedings of a workshop held at Sejong University, Seoul, Korea, 1-5 November 2005. San Francisco: Astronomical Society of the Pacific. 2007. S. 245. (Astronomical Society of the Pacific Conference Series, Band 362).

Variability of Balmer Profiles in Magnetic Ap/Bp Stars

Abstract

Publikationsreihe

ÖFOS 2012

Andere Dateien und Links

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Zitationsweisen