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Two dynamically discovered compact object candidate binary systems from LAMOST low-resolution survey

文献类型：期刊论文

作者Qi, Senyu3; Gu, Wei-Min3; Zhang, Zhi-Xiang3; Yi, Tuan1; Liu, Jin-Zhong2; Zheng, Ling-Lin3
刊名MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
出版日期2024-07-09
卷号532期号:2页码:1718-1728
关键词techniques: photometric techniques: radial velocities binaries: close binaries: spectroscopic white dwarfs
ISSN号0035-8711
DOI10.1093/mnras/stae1590
产权排序3
英文摘要We report two binary systems, LAMOST J035540 + 381550 (hereafter J035540) and LAMOST J035916 + 400732 (hereafter J035916), identified through the Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST) low-resolution survey (LRS). Each of these two systems contains an M-type star orbiting with a invisible compact object candidate. Follow-up spectroscopic observations of Palomar 200-in. telescope (P200) enhance radial velocity measurements. We use radial velocities from LAMOST and P200, as well as light curves from Zwicky Transient Facility (ZTF) to constrain orbital parameters. The masses of the visible M-type stars are estimated by fitting the MIST isochrones and spectral energy distributions. The mass functions for the unseen companions are: 0.22 +/- 0.01 M-circle dot for J035540 and 0.16 +/- 0.01 M(circle dot)for J035916. With the orbital and stellar parameters derived above and assuming the orbital inclination is 90 degrees (edge-on), we find that the minimum masses of the invisible companions exceeds that of the visible stars. The single-lined feature and the dynamical evidence suggest the presence of compact objects. J035540's ZTF light curve, modelled with phoebe, yields a compact object mass of 0.70(-0.05)(+0.12)M(circle dot). For J035916, ellipsoidal modulation analysis constrains the light-curve amplitude, yielding a compact object mass range of 0.57-0.90M(circle dot). The mass estimates indicate that both are likely white dwarfs. These findings underscore the efficiency of optical time-domain surveys and dynamical methods in identifying faint, massive white dwarfs, along with other compact objects in binaries.
WOS关键词MAIN-SEQUENCE BINARIES ; BLACK-HOLE CANDIDATES ; FINAL MASS RELATION ; TIME-DOMAIN SURVEY ; WHITE-DWARF ; PATHWAYS SURVEY ; NEUTRON-STAR ; MODEL ATMOSPHERES ; DATA RELEASE ; SPECTROSCOPIC BINARIES
资助项目National Key R&D Program of China[2023YFA1607901] ; National Key R&D Program of China[2021YFA1600401] ; National Natural Science Foundation of China[11925301] ; National Natural Science Foundation of China[12033006] ; National Natural Science Foundation of China[12221003] ; National Natural Science Foundation of China[12263003] ; China National Postdoctoral Program for Innovation Talents[BX20230020] ; Tianshan Talent Training Program[2023TSYCCX0101] ; China Manned Space Project ; Telescope Access Program (TAP)[CTAP2023-B0098]
WOS研究方向Astronomy & Astrophysics
语种英语
WOS记录号WOS:001265567200002
出版者OXFORD UNIV PRESS
资助机构National Key R&D Program of China ; National Natural Science Foundation of China ; China National Postdoctoral Program for Innovation Talents ; Tianshan Talent Training Program ; China Manned Space Project ; Telescope Access Program (TAP)
源URL[http://ir.xao.ac.cn/handle/45760611-7/6855]  
专题光学天文与技术应用研究室_变星研究团组
通讯作者Gu, Wei-Min
作者单位1.Peking Univ, Sch Phys, Dept Astron, Beijing 100871, Peoples R China
2.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Xinjiang, Peoples R China
3.Xiamen Univ, Dept Astron, Xiamen 361005, Fujian, Peoples R China
推荐引用方式
GB/T 7714		 Qi, Senyu,Gu, Wei-Min,Zhang, Zhi-Xiang,et al. Two dynamically discovered compact object candidate binary systems from LAMOST low-resolution survey[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2024,532(2):1718-1728.
APA Qi, Senyu,Gu, Wei-Min,Zhang, Zhi-Xiang,Yi, Tuan,Liu, Jin-Zhong,&Zheng, Ling-Lin.(2024).Two dynamically discovered compact object candidate binary systems from LAMOST low-resolution survey.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,532(2),1718-1728.
MLA Qi, Senyu,et al."Two dynamically discovered compact object candidate binary systems from LAMOST low-resolution survey".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 532.2(2024):1718-1728.

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