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LAMOST spectra and photometric behaviour of four AM CVn binaries
Han ZT(韩忠涛)1,2,3,4,5; Soonthornthum, Boonrucksar2; Qian SB(钱声帮)1,4,5,6; Sarotsakulchai, T.2; Zhu LY(朱俐颖)1,4,5,6; Dong, Aijun3; Zhi, Qijun3
发表期刊NEW ASTRONOMY
2021-08-01
卷号87页码:10
DOI10.1016/j.newast.2021.101604
产权排序第1完成单位
收录类别SCI
关键词Binaries : close Binaries : spectroscopic Binaries : novae Cataclysmic variables Binaries : AM CVn stars
摘要

We present a study of the LAMOST spectra and public photometric data for four AM CVn binaries with orbital periods ranging from 17 to 41 min. The prototypical star AM CVn displays short-term brightness fluctuations, which most likely arise from its superhump modulation. The superhump period of PTF1J0719+4858 is identified to be 1659.85(13) s, slightly longer than its orbital period. We find a short-lived dip in the phase-folded light curve centered on a phase of similar to 0.5 during the 2008 March outburst of YZ LMi. This dip can be interpreted as the obscuration of the accretion flow or inner disc. The superhump period of V493 Gem has a positive period derivative during the middle stage, which can be seen in most SU UMa-type cataclysmic variables (CVs). By applying the growing superhump method we determined its mass ratio to be q = 0.0315(24). The quiescent spectra of both PTF1J0719+4858 and V493 Gem show clear metal lines and reveal a possible white dwarf donor. We also discussed the theoretical values of the donor mass and the mass transfer rate of these two systems.

资助项目National Natural Science Foundation of China[11803083] ; National Natural Science Foundation of China[11933008] ; National Natural Science Foundation of China[U1831120] ; National Natural Science Foundation of China[U1731238] ; Key Science Foundation of Yunnan Province[2017FA001] ; West Light Foundation of The Chinese Academy of Sciences[E0290601] ; Foundation of Science and Technology of Guizhou Province[(2016)4008] ; Foundation of Science and Technology of Guizhou Province[(2017)5726-37] ; Foundation of Guizhou Provincial Education Department[KY(2020) 003] ; National Development and Reform Commission
项目资助者National Natural Science Foundation of China[11803083, 11933008, U1831120, U1731238] ; Key Science Foundation of Yunnan Province[2017FA001] ; West Light Foundation of The Chinese Academy of Sciences[E0290601] ; Foundation of Science and Technology of Guizhou Province[(2016)4008, (2017)5726-37] ; Foundation of Guizhou Provincial Education Department[KY(2020) 003] ; National Development and Reform Commission
语种英语
学科领域天文学 ; 恒星与银河系 ; 恒星天文学
学科门类理学 ; 理学::天文学
文章类型Article
出版者ELSEVIER
出版地RADARWEG 29, 1043 NX AMSTERDAM, NETHERLANDS
ISSN1384-1076
URL查看原文
WOS记录号WOS:000649261300003
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]CATACLYSMIC VARIABLES ; DWARF NOVA ; X-RAY ; STARS ; POPULATION ; SYSTEMS ; SUPERHUMPS
引用统计
被引频次:1[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/24346
专题双星与变星研究组
中国科学院天体结构与演化重点实验室
通讯作者Han ZT(韩忠涛)
作者单位1.Yunnan Observatories, Chinese Academy of Sciences (CAS), P.O. Box 110, Kunming 650216, China
2.National Astronomical Research Institute of Thailand, Ministry of Higher Education Science Research and Innovation, 260 Moo 4, T. Donkaew, A. Maerim, Chiangmai, 50180, Thailand
3.Guizhou Provincial Key Laboratory of Radio Data Processing, School of Physics and Electronic Sciences, Guizhou Education University, Guiyang 550001, China
4.Key Laboratory of the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, P.O. Box 110, Kunming 650216, China
5.Center for Astronomical Mega-Science, Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing, 100012, P.R. China
6.University of Chinese Academy of Sciences, Yuquan Road 19#, Sijingshang Block, Beijing 100049, China
第一作者单位中国科学院云南天文台
通讯作者单位中国科学院云南天文台
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GB/T 7714
Han ZT,Soonthornthum, Boonrucksar,Qian SB,et al. LAMOST spectra and photometric behaviour of four AM CVn binaries[J]. NEW ASTRONOMY,2021,87:10.
APA Han ZT.,Soonthornthum, Boonrucksar.,Qian SB.,Sarotsakulchai, T..,Zhu LY.,...&Zhi, Qijun.(2021).LAMOST spectra and photometric behaviour of four AM CVn binaries.NEW ASTRONOMY,87,10.
MLA Han ZT,et al."LAMOST spectra and photometric behaviour of four AM CVn binaries".NEW ASTRONOMY 87(2021):10.
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