HL Dra: an active Algol-like binary system with a pulsating component star and a cool third body

doi:10.1093/mnras/stab1657

YNAO OpenIR > 双星与变星研究组

	HL Dra: an active Algol-like binary system with a pulsating component star and a cool third body
	Shi XD(施相东)1,2,3,4 ; Qian SB(钱声帮)1,2,3,4 ; Li LJ(李临甲)1,3,4 ; Liao WP(廖文萍)1,2,3,4
发表期刊	MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
	2021-07-06
卷号	505 期号:4 页码:6166-6178
DOI	10.1093/mnras/stab1657
产权排序	第1完成单位
收录类别	SCI ; EI
关键词	stars: activity stars: binaries: close stars: binaries: eclipsing stars: individual: HL Draconis stars: variables: Scuti
摘要	HL Draconis (HL Dra) is an oscillating eclipsing binary with an orbital period of 0.944276 d. By analysing the light curves observed with the Transiting Exoplanet Survey Satellite (TESS), it has been detected that HL Dra is an Algol-like binary system with a mass ratio of 0.361, where the radius filling factor (= r/R-L) of the primary and secondary component is 87 per cent and 98 per cent, respectively. The secondary component is almost filling its critical Roche lobe, but not entirely. The absolute parameters of the component are estimated in this paper. Both the variable O'Connell effect and the existence of superflares indicate that the secondary should have strong magnetic activities. It is discovered that the O - C curve shows a sinusoidal variation with a period of 129.88 yr. This cyclic change might be caused by the effects of the light travel time as a result of the presence of a cool red dwarf third body. The correlations between the changes of the O - C diagrams and the variable O'Connell effect during TESS observations might be caused by the magnetic activity of the secondary (i.e. the Applegate mechanism). After removal of the binary model, a total of 252 pulsation frequencies are detected from the high-precision photometric data of TESS, including 28 multiplets of tidally split frequencies. We identify two radial modes, 21 non-radial p-modes and three non-radial f-modes from the possible independent frequencies. All of these features reveal that HL Dra is a very interesting system for further investigations of binary formation and evolution, and for tidal interactions on stellar pulsations and on magnetic activities.
资助项目	Chinese Natural Science FoundationNational Natural Science Foundation of China (NSFC)[11933008] ; Chinese Natural Science FoundationNational Natural Science Foundation of China (NSFC)[11873017] ; Chinese Natural Science FoundationNational Natural Science Foundation of China (NSFC)[11803084] ; NASA Office of Space ScienceNational Aeronautics & Space Administration (NASA) ; NASA Explorer ProgramNational Aeronautics & Space Administration (NASA)
项目资助者	Chinese Natural Science FoundationNational Natural Science Foundation of China (NSFC)[11933008, 11873017, 11803084] ; NASA Office of Space ScienceNational Aeronautics & Space Administration (NASA) ; NASA Explorer ProgramNational Aeronautics & Space Administration (NASA)
语种	英语
学科领域	天文学 ; 恒星与银河系 ; 恒星形成与演化
文章类型	Article
出版者	OXFORD UNIV PRESS
出版地	GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
ISSN	0035-8711
URL	查看原文
WOS记录号	WOS:000767870700016
WOS研究方向	Astronomy & Astrophysics
WOS类目	Astronomy & Astrophysics
关键词[WOS]	ORBIT CLOSE BINARIES ; ISENTROPIC OSCILLATIONS ; TIDAL PERTURBATIONS ; ECLIPSING BINARY ; VELOCITY ; LIGHT
EI入藏号	20221712020612
EI主题词	Stars
EI分类号	431 Air Transportation - 432 Highway Transportation - 433 Railroad Transportation - 434 Waterway Transportation - 657.2 Extraterrestrial Physics and Stellar Phenomena - 701.2 Magnetism: Basic Concepts and Phenomena
引用统计	被引频次：1[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
版本	出版稿
条目标识符	http://ir.ynao.ac.cn/handle/114a53/24581
专题	双星与变星研究组
通讯作者	Shi XD(施相东)
作者单位	1.Yunnan Observatories, Chinese Academy of Sciences (CAS), PO Box 110, Kunming 650216, China; 2.University of Chinese Academy of Sciences, Yuquan Road 19, Sijingshang Block, Beijing 100049, China; 3.Key Laboratory of the Structure and Evolution of Celestial Objects, CAS, Kunming 650216, China; 4.Center for Astronomical Mega-Science, CAS, 20A Datun Road, Chaoyang District, Beijing 100012, China
第一作者单位	中国科学院云南天文台
通讯作者单位	中国科学院云南天文台
推荐引用方式 GB/T 7714	Shi XD,Qian SB,Li LJ,et al. HL Dra: an active Algol-like binary system with a pulsating component star and a cool third body[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2021,505(4):6166-6178.
APA	Shi XD,Qian SB,Li LJ,&Liao WP.(2021).HL Dra: an active Algol-like binary system with a pulsating component star and a cool third body.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,505(4),6166-6178.
MLA	Shi XD,et al."HL Dra: an active Algol-like binary system with a pulsating component star and a cool third body".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 505.4(2021):6166-6178.

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