An18.9 min blue large-amplitude pulsator crossing the 'Hertzsprung gap' of hot subdwarfs
文献类型：期刊论文
| 作者 | Lin, Jie17,18; Wu, Chengyuan2,17,18; Wang, Xiaofeng16,17,18; Nemeth, Peter14,15; Xiong, Heran1,2; Wu, Tao2,10,11,12,13; Filippenko, Alexei, V9; Cai, Yongzhi17,18; Brink, Thomas G.9; Yan, Shengyu17,18 |
| 刊名 | NATURE ASTRONOMY
 |
| 出版日期 | 2022-09-29 |
| 页码 | 16 |
| ISSN号 | 2397-3366 |
| DOI | 10.1038/s41550-022-01783-z |
| 通讯作者 | Wang, Xiaofeng(wang_xf@mail.tsinghua.edu.cn) |
| 英文摘要 | Blue large-amplitude pulsators (BLAPs) represent a new and rare class of hot pulsating stars with unusually large amplitudes and short periods. The evolutionary path that could give rise to such kinds of stellar configurations is unclear. Here we report a comprehensive study ofthe peculiar BLAP discovered by the Tsinghua University-Ma Huateng Telescopes for Survey (TMTS), namely, TMTSJ035143.63+584,504.2 (TMTS-BLAP-1). This new BLAP has an 18.9 min pulsation period and is similar to the BLAPs with a low surface gravity and extended helium-enriched envelope, suggesting that it is a low-gravity BLAP at the shortest-period end. In particular, the long-term monitoring data reveal that this pulsating star has an unusually large rate of period change, namely, (P) over dot/P = 2.2 x 10(-6) yr(-1). Such a significant and positive value challenges its origins from both helium-core pre-white-dwarfs and core helium-burning subdwarfs, but is consistent with that derived from shell helium-burning subdwarfs. The particular pulsation period and unusual rate of period change indicate that TMTS-BLAP-1 is at a short-lived (similar to 10(6) yr) phase of shell helium ignition before the stable shell helium burning; in other words, TMTS-BLAP-1 is going through a 'Hertzsprung gap' of hot subdwarfs. |
| WOS关键词 | B-STARS ; EVOLUTIONARY STATUS ; DRIVING MECHANISM |
| 资助项目 | National Science Foundation of China (NSFC)[12033003] ; National Science Foundation of China (NSFC)[11633002] ; Ma Huateng Foundation ; Scholar Program of Beijing Academy of Science and Technology[DZ:BS202002] ; Tencent Xplorer Prize ; National Natural Science Foundation of China (NSFC)[12003013] ; Grant Agency of the Czech Republic[GACR 22-34467S] ; Polish National Science Centre[UMO-2017/26/E/ST9/00703] ; Polish National Science Centre[UMO-2017/25/B/ST9/02218] ; B-type Strategic Priority Program of the Chinese Academy of Sciences[XDB41000000] ; National Key R&D Program of China[2021YFA1600402] ; NSFC of China[11873084] ; NSFC of China[12133011] ; Youth Innovation Promotion Association of the Chinese Academy of Sciences ; Ten Thousand Talents Program of Yunnan for Top-notch Young Talents ; Miller Institute for Basic Research in Science ; Christopher R. Redlich Fund ; China Postdoctoral Science Foundation[2021M691821] ; W. M. Keck Foundation ; NASA[NN12AR55G] ; NASA[80NSSC18K0284] ; NASA[80NSSC18K1575] ; Kepler/K2 grant[J1944/80NSSC19K0112] ; Kepler/K2 grant[HST GO-15889] ; STFC[ST/T000198/1] ; STFC[ST/S006109/1] ; US National Science Foundation[AST-1440341] ; US National Science Foundation[AST-2034437] ; Caltech ; IPAC ; Weizmann Institute for Science ; Oskar Klein Center at Stockholm University ; University of Maryland ; University of Washington ; Deutsches Elektronen-Synchrotron and Humboldt University ; Los Alamos National Laboratories ; TANGO Consortium of Taiwan ; University of Wisconsin at Milwaukee ; Trinity College Dublin ; Lawrence Livermore National Laboratories ; Lawrence Berkeley National Laboratory ; IN2P3 (France) ; [RVO:67985815] |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| 出版者 | NATURE PORTFOLIO |
| WOS记录号 | WOS:000863153200002 |
| 资助机构 | National Science Foundation of China (NSFC) ; Ma Huateng Foundation ; Scholar Program of Beijing Academy of Science and Technology ; Tencent Xplorer Prize ; National Natural Science Foundation of China (NSFC) ; Grant Agency of the Czech Republic ; Polish National Science Centre ; B-type Strategic Priority Program of the Chinese Academy of Sciences ; National Key R&D Program of China ; NSFC of China ; Youth Innovation Promotion Association of the Chinese Academy of Sciences ; Ten Thousand Talents Program of Yunnan for Top-notch Young Talents ; Miller Institute for Basic Research in Science ; Christopher R. Redlich Fund ; China Postdoctoral Science Foundation ; W. M. Keck Foundation ; NASA ; Kepler/K2 grant ; STFC ; US National Science Foundation ; Caltech ; IPAC ; Weizmann Institute for Science ; Oskar Klein Center at Stockholm University ; University of Maryland ; University of Washington ; Deutsches Elektronen-Synchrotron and Humboldt University ; Los Alamos National Laboratories ; TANGO Consortium of Taiwan ; University of Wisconsin at Milwaukee ; Trinity College Dublin ; Lawrence Livermore National Laboratories ; Lawrence Berkeley National Laboratory ; IN2P3 (France) |
| 源URL | [http://ir.xao.ac.cn/handle/45760611-7/4887]  |
| 专题 | 新疆天文台_光学天文与技术应用研究室 |
| 通讯作者 | Wang, Xiaofeng |
| 作者单位 | 1.Australian Natl Univ, Res Sch Astron & Astrophys, Canberra, ACT, Australia 2.Chinese Acad Sci, Yunnan Observ, Kunming, Yunnan, Peoples R China 3.Tel Aviv Univ, Sch Phys & Astron, Tel Aviv, Israel 4.Chinese Acad Sci, Natl Astron Observ China, Beijing, Peoples R China 5.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi, Peoples R China 6.Beijing Normal Univ, Dept Astron, Beijing, Peoples R China 7.China West Normal Univ, Dept Astron, Nanchong, Peoples R China 8.China Three Gorges Univ, Ctr Astron & Space Sci, Yichang, Peoples R China 9.Univ Calif Berkeley, Dept Astron, 601 Campbell Hall, Berkeley, CA 94720 USA 10.Shanxi Univ, Inst Theoret Phys, Taiyuan, Peoples R China |
| 推荐引用方式 GB/T 7714 | Lin, Jie,Wu, Chengyuan,Wang, Xiaofeng,et al. An18.9 min blue large-amplitude pulsator crossing the 'Hertzsprung gap' of hot subdwarfs[J]. NATURE ASTRONOMY,2022:16. |
| APA | Lin, Jie.,Wu, Chengyuan.,Wang, Xiaofeng.,Nemeth, Peter.,Xiong, Heran.,...&Zhang, Xinghan.(2022).An18.9 min blue large-amplitude pulsator crossing the 'Hertzsprung gap' of hot subdwarfs.NATURE ASTRONOMY,16. |
| MLA | Lin, Jie,et al."An18.9 min blue large-amplitude pulsator crossing the 'Hertzsprung gap' of hot subdwarfs".NATURE ASTRONOMY (2022):16. |
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来源：新疆天文台
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