Orbital parameters for an ELM white dwarf with a white dwarf companion: LAMOST J033847.06+413424.2

doi:10.1093/mnras/stad3100

	Orbital parameters for an ELM white dwarf with a white dwarf companion: LAMOST J033847.06+413424.2
	Yuan, Hailong 2; Li ZW(李振威)4; Bai, Zhongrui 2; Dong, Yiqiao 2; Cheng, Yao 1; Chen XF(陈雪飞)4; Zhang, Zhixiang 1; Wang, Mengxin 2; Yang, Mingkuan 2; Huang, Xin 2
刊名	MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
	2023-10-20
卷号	526 期号:4 页码:5471-5482
关键词	binaries (including multiple): close binaries: general binaries: spectroscopic white dwarfs
ISSN号	0035-8711
DOI	10.1093/mnras/stad3100
产权排序	第2完成单位
文献子类	Article
英文摘要	Double white dwarf systems are of great astrophysical importance in the field of gravitational wave and Type Ia supernova. While the binary fraction of CO core white dwarf is about a few per cents, the extremely low mass white dwarfs are all thought to be within binary systems. In this work, we report the orbital solution of a double degenerate system: J033847.06+413424.24, an extremely low mass He core white dwarf orbiting a CO core white dwarf. With LAMOST and P200, time domain spectroscopic observations have been made and spectral atmosphere parameters are estimated to be T-eff similar to 22 500 K and log g similar to 5.6 dex. Combining Gaia parallax, 3D extinction, and evolution tracks, we estimate a radius of similar to 0.12 R-circle dot and a mass of similar to 0.22 M-circle dot. With the 37 single exposure spectra, the radial velocities are measured and the orbital parameters are estimated to be P = 0.1253132(1) d, K1 = 289 +/- 4 km s(-1) and V-sys = -41 +/- 3 km s(-1). The radial velocity based system ephemeris is also provided. The light curves from several photometric surveys show no orbital modulation. The orbital solution suggests that the invisible companion has a minimum mass of about 0.60 M-circle dot and is similar to 0.79 M-circle dot for an inclination of 60.0 degrees, indicating most probably a CO core white dwarf. The system is expected to merge in about 1 Gyr. With present period and distance (similar to 596 pc) it cannot irradiate strong enough gravitational wave for LISA. More double degenerate systems are expected to be discovered and parametrized as the LAMOST survey goes on.
学科主题	天文学
URL标识	查看原文
出版地	GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
资助项目	National Development and Reform Commission; National Natural Science Foundation of China[12273056]; National Natural Science Foundation of China[12090041]; National Natural Science Foundation of China[11933004]; National Natural Science Foundation of China[11873066]; National Natural Science Foundation of China[11733008]; National Natural Science Foundation of China[12103086]; National Natural Science Foundation of China[12090040/12090043]; National Key R&D Program of China[2019YFA0405002]; National Key R&D Program of China[2022YFA1603002]; National Key R&D Program of China[2021YFA1600403]; Youth Innovation Promotion Association of the CAS[2020060]; National Science Fund for Distinguished Young Scholars[12125303]; Yunnan Fundamental Research Projects[202101AU070276]; China Manned Space Project[CMS-CSST-2021-A10]
WOS关键词	EXTREMELY LOW-MASS ; HOT SUBDWARF STARS ; DATA RELEASE ; GAIA DR2 ; LIGHT CURVES ; B-STARS ; BINARY ; CATALOG ; EVOLUTION ; DISCOVERY
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	OXFORD UNIV PRESS
WOS记录号	WOS:001092001800009
资助机构	National Development and Reform Commission ; National Natural Science Foundation of China[12273056, 12090041, 11933004, 11873066, 11733008, 12103086, 12090040/12090043] ; National Key R&D Program of China[2019YFA0405002, 2022YFA1603002, 2021YFA1600403] ; Youth Innovation Promotion Association of the CAS[2020060] ; National Science Fund for Distinguished Young Scholars[12125303] ; Yunnan Fundamental Research Projects[202101AU070276] ; China Manned Space Project[CMS-CSST-2021-A10]
内容类型	期刊论文
版本	出版稿
源URL	[http://ir.ynao.ac.cn/handle/114a53/26528]
专题	云南天文台_大样本恒星演化研究组
作者单位	1.Department of Astronomy, Xiamen University, Xiamen 361005, China; 2.Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, China; 3.Department of Astronomy, University of Science and Technology of China, Hefei 230026, China 4.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650011, China; 5.Department of Physics and Astronomy, Guizhou University, Guiyang 550025, China;
推荐引用方式 GB/T 7714	Yuan, Hailong,Li ZW,Bai, Zhongrui,et al. Orbital parameters for an ELM white dwarf with a white dwarf companion: LAMOST J033847.06+413424.2[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2023,526(4):5471-5482.
APA	Yuan, Hailong.,李振威.,Bai, Zhongrui.,Dong, Yiqiao.,Cheng, Yao.,...&Zhang, Haotong.(2023).Orbital parameters for an ELM white dwarf with a white dwarf companion: LAMOST J033847.06+413424.2.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,526(4),5471-5482.
MLA	Yuan, Hailong,et al."Orbital parameters for an ELM white dwarf with a white dwarf companion: LAMOST J033847.06+413424.2".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 526.4(2023):5471-5482.