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

doi:10.1093/mnras/stae290

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	Variable white dwarfs in TMTS: asteroseismological analysis of a ZZ Ceti star, TMTS J17184064+2524314
	Guo, Jincheng 1; Chen, Yanhui 2,3,4; Yang, Yonghui 2,3,4; Wang, Xiaofeng 1,5,6; Lin, Jie 5,6,7,8; Ma, Xiao-Yu 9; Xi, Gaobo 5,6; Mo, Jun 5,6; Filippenko, Alexei, V 11; Brink, Thomas G.11; Zong, Weikai 9,10; Yan, Huahui 12,13; Zhao, Jingkun 13,14; Zeng, Xiangyun 15; Chen, Zhihao 5,6; Esamdin, Ali16 ; Guo, Fangzhou 5,6; Iskandar, Abdusamatjan 16; Jiang, Xiaojun 13,14; Li, Wenxiong 17; Liu, Cheng 1; Shi, Jianrong 13,14; Song, Xuan 1; Wang, Letian16 ; Xiang, Danfeng 5,6; Yan, Shengyu 5,6; Zhang, Jicheng 10
	2024-02-07
Source Publication	MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
ISSN	0035-8711
Volume	528 Issue:3 Pages:5242-5251
Contribution Rank	16
Abstract	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.
Keyword	stars: individual: TMTS J17184064+2524314 stars: oscillations stars: variables: general white dwarfs
DOI	10.1093/mnras/stae290
Indexed By	SCI
Language	英语
WOS Keyword	MINUTE-CADENCE OBSERVATIONS ; DIGITAL SKY SURVEY ; CONVECTIVE BOUNDARIES ; COOLING SEQUENCE ; HYDROGEN-RICH ; LAMOST FIELDS ; GAIA ; EVOLUTIONARY ; HALO ; CONSTRAINTS
Funding Project	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 Research Area	Astronomy & Astrophysics
WOS Subject	Astronomy & Astrophysics
WOS ID	WOS:001177394000017
Publisher	OXFORD UNIV PRESS
Funding Organization	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
Citation statistics	Cited Times:1[WOS] [WOS Record] [Related Records in WOS]
Document Type	期刊论文
Identifier	http://ir.xao.ac.cn/handle/45760611-7/6225
Collection	中国科学院新疆天文台
Corresponding Author	Guo, Jincheng; Yang, Yonghui; Wang, Xiaofeng
Affiliation	1.Beijing Planetarium, Dept Sci Res, Beijing 100044, Peoples R China 2.Chuxiong Normal Univ, Inst Astrophys, Chuxiong 675000, Peoples R China 3.Int Ctr Supernovae ICESUN, Yunnan Key Lab, Kunming 650216, Peoples R China 4.Kunming Univ Sci & Technol, Fac Sci, Kunming 650093, Peoples R China 5.Tsinghua Univ, Phys Dept, Beijing 100084, Peoples R China 6.Tsinghua Univ, Tsinghua Ctr Astrophys, Beijing 100084, Peoples R China 7.Univ Sci & Technol China, Dept Astron, CAS Key Lab Res Galaxies & Cosmol, Hefei 230026, Peoples R China 8.Univ Sci & Technol China, Sch Astron & Space Sci, Hefei 230026, Peoples R China 9.Beijing Normal Univ, Inst Frontiers Astron & Astrophys, Beijing 102206, Peoples R China 10.Beijing Normal Univ, Dept Astron, Beijing 100875, Peoples R China 11.Univ Calif Berkeley, Dept Astron, Berkeley, CA 94720 USA 12.Shandong Univ, Sch Space Sci & Phys, Shandong Key Lab Opt Astron & Solar Terr Environm, Weihai 264209, Peoples R China 13.Chinese Acad Sci, Key Lab Opt Astron, Natl Astron Observ, Beijing 100101, Peoples R China 14.Univ Chinese Acad Sci, Sch Astron & Space Sci, Beijing 100049, Peoples R China 15.China Three Gorges Univ, Ctr Astron & Space Sci, Yichang 443000, Peoples R China 16.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Peoples R China 17.Tel Aviv Univ, Sch Phys & Astron, IL-69978 Tel Aviv, Israel
Recommended Citation 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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