Exploring the physical properties of the γ Dor binary star RX Dra with photometry and asteroseismology

doi:10.1016/j.newast.2024.102234

YNAO OpenIR > 双星与变星研究组

	Exploring the physical properties of the γ Dor binary star RX Dra with photometry and asteroseismology
	Li P(李平)1 ; Liao WP(廖文萍)1 ; Ceng QH(曾崎环)1 ; Sun QB(孙起斌)1 ; Li MY(李敏榆)1
发表期刊	NEW ASTRONOMY
	2024-10
卷号	111
DOI	10.1016/j.newast.2024.102234
产权排序	第1完成单位
收录类别	SCI
关键词	Stars: Fundamental parameters Individual: RX Draconis Binaries: Eclipsing
摘要	We model the TESS light curve of the binary system RX Dra, and also first calculate a lot of theoretical models to fit the g-mode frequencies previously detected from the TESS series of this system. The mass ratio is determined to be q=0.9026(-0.0032)(+0.0032). We newly found that there are 16 frequencies (F1-F7, F11-F20) identified as dipole g-modes, two frequencies (F21, F22) identified as quadrupole g-modes, and another two frequencies (F23, F24) identified as g-sextupole modes, based on these model fits. The primary star is newly determined to be a gamma Dor pulsator in the main-sequence stage with a rotation period of about 5.7(-0.2)(+0.7) days, rotating slower than the orbital motion. The fundamental parameters of two components are firstly estimated as follows: M-1=1.53(-0.17)(+0.00) M-circle dot, M-2= 1.38(-0.00)(+0.18) M-circle dot, T-1=7240(-44)(+490) K, T-2=6747(-221)(+201) K, R-1=1.8288(-0.0959)(+0.0260) R-circle dot, R-2= 1.3075(-0.2543)(+0.0450) R-circle dot, L-1=8.2830(-0.6036)(+1.8015) L-circle dot and L-2= 3.4145(-0.1843)(+0.1320) L-circle dot. Our results show that the secondary star is in the solar-like pulsator region of the H-R diagram, indicating that it could be a pulsating star of this type. Finally, the radius of the convective core of the primary star is estimated to be about 0.1403(-0.0000)(+0.0206) R-circle dot.
资助项目	National Key RD Program[2022YFE0127300]; National Natural Science Foundation of China[11933008]; Young Talent Project of Yunnan Revitalization Talent Support Programin Yunnan Province; Basic research project of Yunnan Province[202201AT070092]; CAS Light of West ChinaProgram
项目资助者	National Key RD Program[2022YFE0127300] ; National Natural Science Foundation of China[11933008] ; Young Talent Project of Yunnan Revitalization Talent Support Programin Yunnan Province ; Basic research project of Yunnan Province[202201AT070092] ; CAS Light of West ChinaProgram
语种	英语
学科领域	天文学 ; 恒星与银河系
文章类型	Article
出版者	ELSEVIER
出版地	RADARWEG 29, 1043 NX AMSTERDAM, NETHERLANDS
ISSN	1384-1076
URL	查看原文
WOS记录号	WOS:001236799000001
WOS研究方向	Astronomy & Astrophysics
WOS类目	Astronomy & Astrophysics
关键词[WOS]	ECLIPSING BINARY ; DORADUS VARIABLES ; CONVECTIVE CORE ; MASS-TRANSFER ; DELTA SCT ; MODULES ; PULSATIONS ; ROTATION ; MODES ; OSCILLATIONS
引用统计
文献类型	期刊论文
版本	出版稿
条目标识符	http://ir.ynao.ac.cn/handle/114a53/27366
专题	双星与变星研究组
作者单位	1.Yunnan Observatories, Chinese Academy of Sciences (CAS), P.O. Box 110, 650216 Kunming, China; 2.University of Chinese Academy of Sciences, No. 1 Yanqihu East Rd, Huairou District, 101408, Beijing, China
第一作者单位	中国科学院云南天文台
推荐引用方式 GB/T 7714	Li P,Liao WP,Ceng QH,et al. Exploring the physical properties of the γ Dor binary star RX Dra with photometry and asteroseismology[J]. NEW ASTRONOMY,2024,111.
APA	李平,廖文萍,曾崎环,孙起斌,&李敏榆.(2024).Exploring the physical properties of the γ Dor binary star RX Dra with photometry and asteroseismology.NEW ASTRONOMY,111.
MLA	李平,et al."Exploring the physical properties of the γ Dor binary star RX Dra with photometry and asteroseismology".NEW ASTRONOMY 111(2024).

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