YNAO OpenIR  > 大样本恒星演化研究组
The Orbital and Physical Properties of Five Southern Be plus sdO Binary Systems
Wang LQ(王璐茜)1,2; Gies, Douglas R.2; Peters, Geraldine J.3; Han ZW(韩占文)1
发表期刊ASTRONOMICAL JOURNAL
2023-05-01
卷号165期号:5
DOI10.3847/1538-3881/acc6ca
产权排序第1完成单位
收录类别SCI
摘要

Close binary interactions may play a critical role in the formation of the rapidly rotating Be stars. Mass transfer can result in a mass gainer star spun up by the accretion of mass and angular momentum, while the mass donor is stripped of its envelope to form a hot and faint helium star. Far-UV spectroscopy has led to the detection of about 20 such binary Be+sdO systems. Here we report on a 3 yr program of high-quality spectroscopy designed to determine the orbital periods and physical properties of five Be binary systems. These binaries are long orbital period systems with P = 95-237 days and small semiamplitude K (1) < 11 km s(-1). We combined the Be star velocities with prior sdO measurements to obtain mass ratios. A Doppler tomography algorithm shows the presence of the He ii lambda 4686 line in the faint spectrum of the hot companion in four of the targets. We discuss the observed line variability and show evidence of phase-locked variations in the emission profiles of HD 157832, suggesting a possible disk spiral density wave due to the presence of the companion star. The stripped companions in HD 113120 and HD 137387 may have a mass larger than 1.4 M (circle dot), indicating that they could be progenitors of Type Ib and Ic supernovae.

资助项目NSF[2019A-5152] ; NSF[2020A-5169] ; National Science Foundation ; National Natural Science Foundation of China[12103085] ; National Natural Science Foundation of China[12090040] ; National Natural Science Foundation of China[12090043] ; U.S. National Science Foundation[AST-1908026] ; NASA[NAS 5-26555] ; NASA[HST-GO-15659] ; GSU College of Arts and Science
项目资助者NSF[2019A-5152, 2020A-5169] ; National Science Foundation ; National Natural Science Foundation of China[12103085, 12090040, 12090043] ; U.S. National Science Foundation[AST-1908026] ; NASA[NAS 5-26555, HST-GO-15659] ; GSU College of Arts and Science
语种英语
学科领域天文学 ; 恒星与银河系 ; 恒星形成与演化
学科门类理学 ; 理学::天文学
文章类型Article
出版者IOP Publishing Ltd
出版地TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
ISSN0004-6256
URL查看原文
WOS记录号WOS:000971790600001
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]BLANKETED MODEL ATMOSPHERES ; HOT SUBDWARF COMPANION ; LONG-TERM ; TOMOGRAPHIC SEPARATION ; ROTATIONAL VELOCITIES ; ULTRAVIOLET DETECTION ; COMPOSITE SPECTRA ; MASS-TRANSFER ; STARS ; EMISSION
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被引频次:7[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
版本出版稿
条目标识符http://ir.ynao.ac.cn/handle/114a53/25897
专题大样本恒星演化研究组
通讯作者Wang LQ(王璐茜)
作者单位1.Yunnan Observatories, Chinese Academy of Sciences (CAS), Kunming 650216, Yunnan, People's Republic of China; wangluqian@ynao.ac.cn, zhanwenhan@ynao.ac.cn;
2.Center for High Angular Resolution Astronomy and Department of Physics and Astronomy, Georgia State University, P.O. Box 5060, Atlanta, GA 30302-5060, USA; dgies@gsu.edu;
3.Department of Physics and Astronomy, University of Southern California, Los Angeles, CA 90089-0484, USA; gpeters@usc.edu
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
Wang LQ,Gies, Douglas R.,Peters, Geraldine J.,et al. The Orbital and Physical Properties of Five Southern Be plus sdO Binary Systems[J]. ASTRONOMICAL JOURNAL,2023,165(5).
APA Wang LQ,Gies, Douglas R.,Peters, Geraldine J.,&Han ZW.(2023).The Orbital and Physical Properties of Five Southern Be plus sdO Binary Systems.ASTRONOMICAL JOURNAL,165(5).
MLA Wang LQ,et al."The Orbital and Physical Properties of Five Southern Be plus sdO Binary Systems".ASTRONOMICAL JOURNAL 165.5(2023).
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