KIC 12268220: A δ Scuti Pulsating Star and an Active Protohelium White Dwarf in an Eclipsing Binary System

doi:10.3847/1538-4357/ab9b85

NAOC Open IR

	KIC 12268220: A δ Scuti Pulsating Star and an Active Protohelium White Dwarf in an Eclipsing Binary System
	Cui,Kaiming 1,2; Guo,Zhao 3,4; Gao,Qing 1; Ren,Juanjuan 1; Zhang,Junbo1 ; Zhou,Yutao 5,6; Liu,Jifeng1,2,7
	2020-07-31
Source Publication	The Astrophysical Journal
ISSN	0004-637X
Volume	898 Issue:2
Abstract	Abstract We present a photometric, spectroscopic, asteroseismic, and evolutionary analysis of the Algol-type eclipsing binary KIC 12268220. We find the O’Connell effect and anticorrelated eclipse timing variations in the Kepler light curve, revealing the presence of large starspots. Radial velocities and atmospheric parameters are obtained from ground-based spectroscopic observations. Combined with the radial velocity measurements and Gaia-derived total luminosity, our light-curve modeling yields the solution of the physical parameters for both the primary and secondary components. We find 14 independent frequencies arising from the δ Scuti primary, and the observed frequencies agree with the frequency range of unstable modes from nonadiabatic calculations. Based on the conclusion from previous literature, we run a grid of models to study the evolution process of our system. The evolutionary tracks of our model suggest that the low-mass ( ) evolved secondary shows a similar evolutionary state to the R CMa-type system, which might evolve to an EL CVn system.
Keyword	Eclipsing binary stars Delta Scuti variable stars White dwarf stars Stellar evolution
DOI	10.3847/1538-4357/ab9b85
Language	英语
WOS ID	IOP:0004-637X-898-2-ab9b85
Publisher	The American Astronomical Society
Citation statistics
Document Type	期刊论文
Identifier	http://ir.bao.ac.cn/handle/114a11/63255
Collection	中国科学院国家天文台
Affiliation	1.CAS Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, People’s Republic of China; cuikaiming15@mails.ucas.ac.cn 2.School of Astronomy and Space Sciences, University of Chinese Academy of Sciences, Beijing 100049, People’s Republic of China 3.Center for Exoplanets and Habitable Worlds, Department of Astronomy and Astrophysics, 525 Davey Laboratory, The Pennsylvania State University, University Park, PA 16802, USA 4.Copernicus Astronomical Center, Polish Academy of Sciences, Bartycka 18, 00-716 Warsaw, Poland 5.Department of Astronomy, School of Physics, Peking University, Beijing 100871, People’s Republic of China 6.Kavli Institute for Astronomy and Astrophysics, Peking University, Beijing 100871, People’s Republic of China 7.WHU-NAOC Joint Center for Astronomy, Wuhan University, Wuhan, Hubei 430072, People’s Republic of China
First Author Affilication	National Astronomical Observatories, Chinese Academy of Sciences
Recommended Citation GB/T 7714	Cui,Kaiming,Guo,Zhao,Gao,Qing,et al. KIC 12268220: A δ Scuti Pulsating Star and an Active Protohelium White Dwarf in an Eclipsing Binary System[J]. The Astrophysical Journal,2020,898(2).
APA	Cui,Kaiming.,Guo,Zhao.,Gao,Qing.,Ren,Juanjuan.,Zhang,Junbo.,...&Liu,Jifeng.(2020).KIC 12268220: A δ Scuti Pulsating Star and an Active Protohelium White Dwarf in an Eclipsing Binary System.The Astrophysical Journal,898(2).
MLA	Cui,Kaiming,et al."KIC 12268220: A δ Scuti Pulsating Star and an Active Protohelium White Dwarf in an Eclipsing Binary System".The Astrophysical Journal 898.2(2020).

Files in This Item:
There are no files associated with this item.

If you have any objections to this item, please fill out the form below and the administrator will contact you as soon as possible.
Content:
Email：	*
Institution:
Verification Code:	Refresh

Any comments and suggestions are welcomed.
Title:	*
Content:
Email：	*
Verification Code:	Refresh

中国科学院国家天文台机构知识库