Mass-ratio Distribution of Binaries from the LAMOST-MRS Survey | |
Li JD(李江丹)5,6,7; Li J(李蛟)4,6,7; Liu, Chao4,5; Li, Chunqian3,5; Guo YJ(郭彦君)5,6,7; Wang LQ(王璐茜)7; Chen XF(陈雪飞)6,7; Xing LF(邢丽峰)7; Hou, Yonghui1,2; Han ZW(韩占文)5,6,7 | |
刊名 | ASTROPHYSICAL JOURNAL |
2022-07-01 | |
卷号 | 933期号:2 |
关键词 | Close binary stars Binary stars Spectroscopic binary stars Stellar populations Star formation Sky surveys |
ISSN号 | 0004-637X |
DOI | 10.3847/1538-4357/ac731d |
产权排序 | 第1完成单位 |
文献子类 | Article |
英文摘要 | Binary evolution leads to the formation of important objects that are crucial for the development of astrophysics, but the statistical properties of binary populations are still poorly understood. The LAMOST-MRS has provided a large sample of stars to study the properties of binary populations, especially for the mass-ratio distributions and binary fractions. We have devised a peak amplitude ratio (PAR) approach to derive the mass ratio of a binary system based on results obtained from its spectrum. By computing a cross-correlation function, we established a relation between the derived mass ratio and the PARs of the binary systems. By using spectral observations obtained from LAMSOT DR6 and DR7, we applied the PAR approach to form distributions of the derived mass ratio of the binary systems to the spectral types. We selected the mass ratio within the range of 0.6-1.0 to investigate the mass-ratio distribution. Through a power-law fitting, we obtained power index gamma values of -0.42 +/- 0.27, 0.03 +/- 0.12, and 2.12 +/- 0.19 for the A-, F-, and G-type stars identified in the sample, respectively. The derived gamma-values display an increasing trend toward lower primary star masses, and G-type binaries tend to be twins more frequently. The close binary fractions (for P less than or similar to 150 days and q greater than or similar to 0.6) in our sample for A, F, and G binaries are 7.6% +/- 0.5%, 4.9% +/- 0.2%, and 3.7% +/- 0.1%, respectively. Note that the PAR approach can be applied to large spectroscopic surveys of stars. |
学科主题 | 天文学 ; 恒星与银河系 ; 恒星天文学 ; 恒星形成与演化 |
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[12090040/3] ; National Natural Science Foundation of China[12125303] ; National Natural Science Foundation of China[11733008] ; National Natural Science Foundation of China[U1831125] ; National Key R&D Program of China[2021YFA1600401/3] ; China Manned Space Project[CMS-CSST-2021-A10] ; Yunnan Fundamental Research Projects[202101AV070001] ; Chinese Academy of Sciences[U1831125] ; Research Program of Frontier Sciences, CAS[QYZDY-SSW-SLH007] ; National Development and Reform Commission |
WOS关键词 | GENEVA-COPENHAGEN SURVEY ; SOLAR NEIGHBORHOOD ; STARS ; EVOLUTION ; MULTIPLICITY ; POPULATION ; FREQUENCY ; SYSTEMS ; ORIGIN ; TRIPLE |
WOS研究方向 | Astronomy & Astrophysics |
语种 | 英语 |
出版者 | IOP Publishing Ltd |
WOS记录号 | WOS:000822102400001 |
资助机构 | National Natural Science Foundation of China[12090040/3, 12125303, 11733008, U1831125] ; National Key R&D Program of China[2021YFA1600401/3] ; China Manned Space Project[CMS-CSST-2021-A10] ; Yunnan Fundamental Research Projects[202101AV070001] ; Chinese Academy of Sciences[U1831125] ; Research Program of Frontier Sciences, CAS[QYZDY-SSW-SLH007] ; 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/114a53/25288] |
专题 | 云南天文台_大样本恒星演化研究组 |
通讯作者 | Liu, Chao; Han ZW(韩占文) |
作者单位 | 1.School of Astronomy and Space Science University of Chinese Academy of Sciences, People's Republic of China 2.Nanjing Institute of Astronomical Optics & Technology, National Astronomical Observatories, Chinese Academy of Sciences, Nanjing 210042, People's Republic of China; 3.CAS Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, People's Republic of China; 4.Key Lab of Space Astronomy and Technology, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, People's Republic of China; 5.University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China; 6.Key Laboratory for the Structure and Evolution of Celestial Objects, CAS, Kunming 650216, People's Republic of China; liuchao@bao.ac.cn; 7.Yunnan Observatories, Chinese Academy of Sciences (CAS), 396 Yangfangwang, Guandu District, Kunming 650216, People's Republic of China zhanwenhan@ynao.ac.cn; |
推荐引用方式 GB/T 7714 | Li JD,Li J,Liu, Chao,et al. Mass-ratio Distribution of Binaries from the LAMOST-MRS Survey[J]. ASTROPHYSICAL JOURNAL,2022,933(2). |
APA | Li JD.,Li J.,Liu, Chao.,Li, Chunqian.,Guo YJ.,...&Han ZW.(2022).Mass-ratio Distribution of Binaries from the LAMOST-MRS Survey.ASTROPHYSICAL JOURNAL,933(2). |
MLA | Li JD,et al."Mass-ratio Distribution of Binaries from the LAMOST-MRS Survey".ASTROPHYSICAL JOURNAL 933.2(2022). |
个性服务 |
查看访问统计 |
相关权益政策 |
暂无数据 |
收藏/分享 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论