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The sdB Mass - Orbital Period Relation for Long-Orbital-Period SdB+MS Binaries
Chen XF(陈雪飞)1,2; Han ZW(韩占文)1,2; Deca, J.3; Podsiadlowski, P.4
Source PublicationASP Conference Series - 6th Meeting on Hot Subdwarf Stars and Related Objects
2014-04
Volume481
Pages205-212
Author of SourceVanGrootel, V; Green, EM; Fontaine, G; Charpinet, S
Contribution Rank第1完成单位
Indexed ByCPCI
Conference Name6th Meeting on Hot Subdwarf Stars and Related Objects
Conference Date2013-05-19
Conference PlaceSteward Observatory, University of Arizona, Tucson, Arizona, USA
Conference SponsorSteward Observ; Univ Arizona Fdn
Abstract

Recent observations discovered several long-orbital-period subdwarf B (sdB) stars with main-sequence companions. Their orbital periods are far beyond that expected from stable Roche Lobe overflow (RLOF), and then challenge this scenario to form these systems. In this contribution, we show a unique sdB mass – orbital period relation for sdB binaries produced in this way, given the progenitors of the sdB stars have initial masses below the helium flash mass. The observed orbital-period distribution of long-period sdB binaries can be well explained based on this relation. The mass – orbital period relation can be tested observationally if the mass of the sdB star can be determined precisely, e.g. from asteroseismology. Finally, we revised the orbital period distribution of sdB binaries produced by the first stable RLOF channel for the best fitting model of Han et al. (2003), showing a peak around 830 d.

Funding ProjectNSFC[10973036] ; NSFC[11173055] ; NSFC[111033008] ; NSFC[11003003] ; CAS[KJCX2-YW-T24] ; Talent Project of Young Researchers of Yunnan province[2012HB037] ; Talent Project of Western Light
Funding OrganizationNSFC ; CAS ; Talent Project of Young Researchers of Yunnan province[2012HB037] ; Talent Project of Western Light
Language英语
Subject Area天文学 ; 恒星与银河系
MOST Discipline Catalogue理学 ; 理学::天文学
SubtypeProceedings Paper
PublisherASTRONOMICAL SOC PACIFIC
Publication Place390 ASHTON AVE, SAN FRANCISCO, CA 94112 USA
ISBN978-1-58381-846-6
URL查看原文
Archive Date2015-03-24
WOS IDWOS:000398425600027
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordSubdwarf-b-stars ; X-ray Binaries ; Stellar Evolution ; Neutron-star ; Systems ; Opacities ; Pulsars ; Dwarfs ; Origin
Citation statistics
Document Type会议论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/9660
Collection大样本恒星演化研究组
中国科学院天体结构与演化重点实验室
Corresponding AuthorChen XF(陈雪飞)
Affiliation1.Yunnan Observatories, Chinese Academy of Sciences, Kunming, 650011, China
2.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming, 650011, China
3.Centrum voor Plasma-Astrofysica, Katholieke University Leuven, Celestijnenlaan 200B, B-3001 Leuven, Belgium
4.University of Oxford, Department of Astrophysics, Keble Road, Oxford OX1 3RH, UK
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Corresponding Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Chen XF,Han ZW,Deca, J.,et al. The sdB Mass - Orbital Period Relation for Long-Orbital-Period SdB+MS Binaries[C]//VanGrootel, V; Green, EM; Fontaine, G; Charpinet, S. 390 ASHTON AVE, SAN FRANCISCO, CA 94112 USA:ASTRONOMICAL SOC PACIFIC,2014:205-212.
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