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Variable white dwarfs in TMTS: asteroseismological analysis of a ZZ Ceti star, TMTS J17184064+2524314

文献类型：期刊论文

作者Guo, Jincheng14; Chen, Yanhui6,12,13; Yang, Yonghui6,12,13; Wang, Xiaofeng4,5,14; Lin, Jie4,5,8,9; Ma, Xiao-Yu10; Xi, Gaobo4,5; Mo, Jun4,5; Filippenko, Alexei, V11; Brink, Thomas G.11
刊名MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
出版日期2024-02-07
卷号528期号:3页码:5242-5251
关键词stars: individual: TMTS J17184064+2524314 stars: oscillations stars: variables: general white dwarfs
ISSN号0035-8711
DOI10.1093/mnras/stae290
产权排序16
英文摘要The Tsinghua University-Ma Huateng Telescope for Survey (TMTS) has been constantly monitoring the northern sky since 2020 in search of rapidly variable stars. To find variable white dwarfs (WDs), the TMTS catalogue is cross-matched with the WD catalogue of Gaia EDR3, resulting in over 3000 light curves of WD candidates. The WD TMTS J17184064+2524314 (hereafter J1718) is the second ZZ Ceti star discovered among these common sources. Based on the light curves from TMTS, follow-up photometric observations, and Transiting Exoplanet Survey Satellite, 10 periods and three combination periods are detected. A rotation period of 25.12 +/- 0.18 h is derived, according to the identified rotational splitting. Our spectroscopic observation indicates that this WD belongs to DA type with T-eff = 11 670 +/- 604 K, log g = 8.16 +/- 0.36, M = 0.70 +/- 0.23 M-circle dot, and age = 0.51 +/- 0.34 Gyr. Based on core-parametrized asteroseismological model grids (>= 14 million), we derive the best-fitting solution of T-eff = 11 640 +/- 20 K, log g = 8.267 +/- 0.008, and M = 0.750 +/- 0.005 M-circle dot for J1718, consistent with the spectral fitting results. For this WD, the corresponding carbon and oxygen abundances in the core are 0.43 and 0.57, respectively. The distance derived from the intrinsic luminosity given by asteroseismology is 64 +/- 15 pc, in accord with the distance of 70.1 +/- 0.2 pc from Gaia DR3 within the uncertainties.
WOS关键词MINUTE-CADENCE OBSERVATIONS ; DIGITAL SKY SURVEY ; CONVECTIVE BOUNDARIES ; COOLING SEQUENCE ; HYDROGEN-RICH ; LAMOST FIELDS ; GAIA ; EVOLUTIONARY ; HALO ; CONSTRAINTS
资助项目National Natural Science Foundation of China (NSFC)[12203006] ; National Natural Science Foundation of China (NSFC)[12033003] ; National Natural Science Foundation of China (NSFC)[12288102] ; National Natural Science Foundation of China (NSFC)[U1938113] ; National Natural Science Foundation of China (NSFC)[11773035] ; National Natural Science Foundation of China (NSFC)[12090044] ; National Natural Science Foundation of China (NSFC)[12090042] ; National Natural Science Foundation of China (NSFC)[11633002] ; Scholar Program of Beijing Academy of Science and Technology[DZ:BS202002] ; CSST projects[CMS-CSST-2021-B03] ; Innovation Project of Beijing Academy of Science and Technology[11000023T000002062763-23CB059] ; Innovation Project of Beijing Academy of Science and Technology[11000022T000000443055] ; International Centre of Supernovae, Yunnan Key Laboratory[202302AN36000101] ; Ma Huateng Foundation ; Tencent Xplorer Prize
WOS研究方向Astronomy & Astrophysics
语种英语
WOS记录号WOS:001177394000017
出版者OXFORD UNIV PRESS
资助机构National Natural Science Foundation of China (NSFC) ; Scholar Program of Beijing Academy of Science and Technology ; CSST projects ; Innovation Project of Beijing Academy of Science and Technology ; International Centre of Supernovae, Yunnan Key Laboratory ; Ma Huateng Foundation ; Tencent Xplorer Prize
源URL[http://ir.xao.ac.cn/handle/45760611-7/6224]  
专题研究单元未命名
通讯作者Guo, Jincheng; Yang, Yonghui; Wang, Xiaofeng
作者单位1.Tel Aviv Univ, Sch Phys & Astron, IL-69978 Tel Aviv, Israel
2.China Three Gorges Univ, Ctr Astron & Space Sci, Yichang 443000, Peoples R China
3.Univ Chinese Acad Sci, Sch Astron & Space Sci, Beijing 100049, Peoples R China
4.Tsinghua Univ, Phys Dept, Beijing 100084, Peoples R China
5.Tsinghua Univ, Tsinghua Ctr Astrophys, Beijing 100084, Peoples R China
6.Kunming Univ Sci & Technol, Fac Sci, Kunming 650093, Peoples R China
7.Shandong Univ, Sch Space Sci & Phys, Shandong Key Lab Opt Astron & Solar Terr Environm, Weihai 264209, Peoples R China
8.Univ Sci & Technol China, Dept Astron, CAS Key Lab Res Galaxies & Cosmol, Hefei 230026, Peoples R China
9.Univ Sci & Technol China, Sch Astron & Space Sci, Hefei 230026, Peoples R China
10.Beijing Normal Univ, Inst Frontiers Astron & Astrophys, Beijing 102206, Peoples R China
推荐引用方式
GB/T 7714		 Guo, Jincheng,Chen, Yanhui,Yang, Yonghui,et al. Variable white dwarfs in TMTS: asteroseismological analysis of a ZZ Ceti star, TMTS J17184064+2524314[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2024,528(3):5242-5251.
APA Guo, Jincheng.,Chen, Yanhui.,Yang, Yonghui.,Wang, Xiaofeng.,Lin, Jie.,...&Zhang, Jicheng.(2024).Variable white dwarfs in TMTS: asteroseismological analysis of a ZZ Ceti star, TMTS J17184064+2524314.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,528(3),5242-5251.
MLA Guo, Jincheng,et al."Variable white dwarfs in TMTS: asteroseismological analysis of a ZZ Ceti star, TMTS J17184064+2524314".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 528.3(2024):5242-5251.

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来源：新疆天文台

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