Mass Ratio Distribution of Hierarchical Triple Systems from the LAMOST-MRS Survey

doi:10.3847/1538-4357/acf8c4

	Mass Ratio Distribution of Hierarchical Triple Systems from the LAMOST-MRS Survey
	He, Tongyu 1,3,4,5; Li JD(李江丹)2; Chen XF(陈雪飞)2; Yang, Rong-jia 1,3,4,5; Xiao, Lin 1,3,4,5; Han ZW(韩占文)1,2
刊名	ASTROPHYSICAL JOURNAL
	2023-11-01
卷号	958 期号:1
ISSN号	0004-637X
DOI	10.3847/1538-4357/acf8c4
产权排序	第5完成单位
文献子类	Article
英文摘要	Hierarchical triple-star systems consists of three components organized into an inner binary (M 1, M 2) and a more distant outer tertiary (M 3) star. The LAMOST Medium-Resolution Spectroscopic Survey has offered a great sample for the study of triple-system populations. We used the peak amplitude ratio method to obtain the mass ratio (q in, q out) of a triple system from its normalized spectrum. By calculating the cross-correlation function, we determined the correlation between the mass ratio q out (M 3/(M 1 + M 2)) and the amplitude ratio (A 3/(A 1 + A 2)). We derived a q in of 0.5-1.0 and a q out between 0.2 and 0.8. By fitting a power-law function of the corrected q in distribution, gamma in is estimated to be -0.654 +/- 2.915, 4.304 +/- 1.125, and 11.371 +/- 1.309 for A-, F-, and G-type stars. The derived gamma in values increase as the mass decreases, indicating that less massive stars are more likely to have companion stars with similar masses. By fitting a power-law function of the corrected q out distribution, gamma out is estimated to be -2.016 +/- 0.172, -1.962 +/- 0.853, and -1.238 +/- 0.141 for G-, F-, and A-type stars, respectively. The gamma out values show a trend of growth toward lower primary star masses.
学科主题	天文学
URL标识	查看原文
出版地	TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
资助项目	National Natural Science Foundation of China[12288102]; National Natural Science Foundation of China[12090040/3]; National Key R&D Program of China[2021YFA1600400/1]; International Center of Supernova, Yunnan Key Laboratory[202201BC070003]; National Development and Reform Commission
WOS关键词	ROTATIONAL VELOCITIES ; STELLAR ; GAIA ; BINARIES ; STARS ; MULTIPLICITY ; CANDIDATES ; PARAMETERS ; EVOLUTION ; APOGEE
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	IOP Publishing Ltd
WOS记录号	WOS:001096020300001
资助机构	National Natural Science Foundation of China[12288102, 12090040/3] ; National Key R&D Program of China[2021YFA1600400/1] ; International Center of Supernova, Yunnan Key Laboratory[202201BC070003] ; National Development and Reform Commission
内容类型	期刊论文
版本	出版稿
源URL	[http://ir.ynao.ac.cn/handle/114a53/26449]
专题	云南天文台_大样本恒星演化研究组
作者单位	1.College of Physics Science and Technology, Hebei University, Baoding 071002, People's Republic of China; zhanwenhan@ynao.ac.cn; 2.Yunnan Observatories, Chinese Academy of Sciences (CAS), 396 Yangfangwang, Guandu District, Kunming 650216, People's Republic of China 3.Research Center for Computational Physics of Hebei Province, Baoding, 071002, People's Republic of China; 4.Key Laboratory of High-precision Computation and Application of Quantum Field Theory of Hebei Province, Hebei University, Baoding, People's Republic of China; 5.Department of Physics, College of Physical Sciences and Technology, Hebei University, Baoding, People's Republic of China;
推荐引用方式 GB/T 7714	He, Tongyu,Li JD,Chen XF,et al. Mass Ratio Distribution of Hierarchical Triple Systems from the LAMOST-MRS Survey[J]. ASTROPHYSICAL JOURNAL,2023,958(1).
APA	He, Tongyu,李江丹,陈雪飞,Yang, Rong-jia,Xiao, Lin,&韩占文.(2023).Mass Ratio Distribution of Hierarchical Triple Systems from the LAMOST-MRS Survey.ASTROPHYSICAL JOURNAL,958(1).
MLA	He, Tongyu,et al."Mass Ratio Distribution of Hierarchical Triple Systems from the LAMOST-MRS Survey".ASTROPHYSICAL JOURNAL 958.1(2023).