A post-common-envelope binary with double-peaked Balmer emission lines from TMTS

被引：0

作者：

Liu, Qichun ^{[1
]}

Wang, Xiaofeng ^{[1
]}

Lin, Jie ^{[1
,2
,3
]}

Wu, Chengyuan ^{[4
,5
,6
]}

Li, Chunqian ^{[7
,8
]}

Filippenko, Alexei V. ^{[9
]}

Brink, Thomas G. ^{[9
]}

Yang, Yi ^{[1
,9
]}

Zheng, Weikang ^{[9
]}

Liu, Cheng ^{[10
]}

Song, Cuiying ^{[1
]}

Kovalev, Mikhail ^{[4
]}

Ge, Hongwei ^{[4
,5
,6
]}

Zhang, Fenghui ^{[4
,5
,6
]}

Zhang, Xiaobin ^{[11
]}

Xia, Qiqi ^{[1
]}

Peng, Haowei ^{[1
]}

Xi, Gaobo ^{[1
]}

Mo, Jun ^{[1
]}

Yan, Shengyu ^{[1
]}

Shi, Jianrong ^{[11
,12
]}

Li, Jiangdan ^{[4
,5
,6
]}

Yi, Tuan ^{[13
,14
]}

机构：

[1] Tsinghua Univ, Phys Dept, Beijing 100084, Peoples R China

[2] Univ Sci & Technol China, Dept Astron, CAS Key Lab Res Galaxies & Cosmol, Hefei 230026, Peoples R China

[3] Univ Sci & Technol China, Sch Astron & Space Sci, Hefei 230026, Peoples R China

[4] Chinese Acad Sci, Yunnan Observ, Kunming 650216, Peoples R China

[5] Chinese Acad Sci, Key Lab Struct & Evolut Celestial Objects, Kunming 650216, Peoples R China

[6] Int Ctr Supernovae, Yunnan Key Lab, Kunming 650216, Peoples R China

[7] Beijing Normal Univ, Sch Phys & Astron, Beijing 100875, Peoples R China

[8] Beijing Normal Univ, Inst Frontiers Astron & Astrophys, Beijing 102206, Peoples R China

[9] Univ Calif Berkeley, Dept Astron, Berkeley, CA 94720 USA

[10] Beijing Acad Sci & Technol, Beijing Planetarium, Beijing 100044, Peoples R China

[11] Chinese Acad Sci, CAS Key Lab Opt Astron, Natl Astron Observ, Beijing 100101, Peoples R China

[12] Univ Chinese Acad Sci, Sch Astron & Space Sci, Beijing 100049, Peoples R China

[13] Peking Univ, Sch Phys, Dept Astron, Beijing 100871, Peoples R China

[14] Peking Univ, Kavli Inst Astron & Astrophys, Beijing 100871, Peoples R China

来源：

ASTRONOMY & ASTROPHYSICS | 2025年 / 698卷

基金：

中国国家自然科学基金; 国家重点研发计划; 美国国家科学基金会; 北京市自然科学基金;

关键词：

techniques: radial velocities; binaries: spectroscopic; stars: evolution; white dwarfs; stars:; winds; outflows; MINUTE-CADENCE OBSERVATIONS; MAIN-SEQUENCE BINARIES; WHITE-DWARF; LAMOST FIELDS; DARKENING COEFFICIENTS; CATACLYSMIC VARIABLES; STELLAR; STARS; MASS; EVOLUTION;

D O I：

10.1051/0004-6361/202553732

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Context. The dynamical method provides an efficient way to discover post-common-envelope binaries (PCEBs) with faint white dwarfs (WDs), thanks to the development of time-domain survey projects. As close binary systems undergo a common-envelope phase, they offer unique opportunities to study the astrophysical processes associated with binary evolution. Aims. We perform a comprehensive analysis of the PCEB system TMTS J15530469+4457458 (J1553), discovered by the Tsinghua University-Ma Huateng Telescopes for Survey, to explore its physical origin and evolutionary fate. Methods. This system is characterized by double-peaked Balmer emission lines, and we applied a cross-correlation function to derive its radial velocity (RV) from a series of phase-resolved Keck spectra. The physical parameters of this binary were obtained by fitting the light curves and RV simultaneously. The locations of the Balmer lines were inferred from Doppler tomography, and a MESA simulation was performed to explore the evolution of this system. Results. Analyses using the cross-correlation function suggest that this system is a single-lined spectroscopic binary and only one star is optically visible. Further analysis through Doppler tomography indicates that J1553 is a detached binary without an accretion disk. Under such a configuration, the simultaneous light-curve and RV fitting reveal that this system contains an unseen WD with mass M-A = 0.56 +/- 0.09 M-circle dot, and an M4 dwarf with mass M-B = 0.37 +/- 0.02 M-circle dot and radius R-B = 0.403(-0.015)(+0.014). The extra prominent Balmer emission lines seen in the spectra can trace the motion of the WD; these lines are likely formed near the WD surface as a result of wind accretion. According to the MESA simulation, J1553 could have evolved from a binary consisting of a 2.0-4.0 M-circle dot zero-age-main-sequence star and an M dwarf with an initial orbital period P-i approximate to 201-476 d, and the system has undergone a common-envelope (CE) phase. After about 3.3x10(6) yr, J1553 should evolve into a cataclysmic variable, with a transient state as a supersoft X-ray source at the beginning. J1553 is an excellent system for studying wind accretion, CE ejection physics, and binary evolution theory.

引用

页数：8

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