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The orbital period-mass ratio relation of wide sdB plus MS binaries and its application to the stability of RLOF
Vos, Joris1,2; Vuckovic, Maja1; Chen XF(陈雪飞)3,4,5; Han ZW(韩占文)3,4,5; Boudreaux, Thomas6; Barlow, Brad N.6; Ostensen, Roy7; Nemeth, Peter8,9
Source PublicationMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
2019-02-01
Volume482Issue:4Pages:4592-4605
DOI10.1093/mnras/sty3017
Contribution Rank第3完成单位
Indexed BySCI
Keywordbinaries: spectroscopic stars: evolution stars: fundamental parameters subdwarfs
Abstract

Wide binaries with hot subdwarf-B (sdB) primaries and main sequence companions are thought to form only through stable Roche-lobe overflow (RLOF) of the sdB progenitor near the tip of the red giant branch (RGB). We present the orbital parameters of 11 new long-period composite sdB binaries based on spectroscopic observations obtained with the UVES, FEROS, and CHIRON spectrographs. Using all wide sdB binaries with known orbital parameters, 23 systems, the observed period distribution is found to match very well with theoretical predictions. A second result is the strong correlation between the orbital period (P) and the mass ratio (q) in the observed wide sdB binaries. In the P-q plane two distinct groups emerge, with the main group (18 systems) showing a strong correlation of lower mass ratios at longer orbital periods. The second group comprises systems that are thought to be formed from higher mass progenitors. Based on theoretical models, a correlation between the initial mass ratio at the start of RLOF and core mass of the sdB progenitor is found, which defines a mass-ratio range at which RLOF is stable on the RGB.

Funding ProjectFondo Nacional de DesarrolloCientifico y Technologico (FONDECYT)[3160504] ; Natural Science Foundation of China[11733008] ; Natural Science Foundation of China[11521303] ; Yunnan province[2017HC018] ; High Point University ; European Organisation for Astronomical Research in the Southern Hemisphere under ESO programmes[088.D-0364(A)] ; European Organisation for Astronomical Research in the Southern Hemisphere under ESO programmes[093.D-0629(A)] ; European Organisation for Astronomical Research in the Southern Hemisphere under ESO programmes[096.D-0180(A)] ; European Organisation for Astronomical Research in the Southern Hemisphere under ESO programmes[097.D-0110(A)] ; European Organisation for Astronomical Research in the Southern Hemisphere under ESO programmes[098.D-0018(A)] ; European Organisation for Astronomical Research in the Southern Hemisphere under ESO programmes[099.D-0014(A)] ; European Organisation for Astronomical Research in the Southern Hemisphere under ESO programmes[099.A-9019(A)] ; European Organisation for Astronomical Research in the Southern Hemisphere under ESO programmes[0100.D-0082(A)] ; CTIO/SMARTS 1.5-m telescope through the CNTAC[CN2018A-23]
Funding OrganizationFondo Nacional de DesarrolloCientifico y Technologico (FONDECYT)[3160504] ; Natural Science Foundation of China[11733008, 11521303] ; Yunnan province[2017HC018] ; High Point University ; European Organisation for Astronomical Research in the Southern Hemisphere under ESO programmes[088.D-0364(A), 093.D-0629(A), 096.D-0180(A), 097.D-0110(A), 098.D-0018(A), 099.D-0014(A), 099.A-9019(A), 0100.D-0082(A)] ; CTIO/SMARTS 1.5-m telescope through the CNTAC[CN2018A-23]
Language英语
Subject Area天文学 ; 恒星与银河系 ; 恒星形成与演化
MOST Discipline Catalogue理学 ; 理学::天文学
SubtypeArticle
PublisherOXFORD UNIV PRESS
Publication PlaceGREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
ISSN0035-8711
URL查看原文
WOS IDWOS:000462327300023
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordSUBDWARF-B-STARS ; ORIGIN ; SPECTROGRAPH
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/19637
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 AuthorVos, Joris
Affiliation1.Instituto de F´ısica y Astronom´ıa, Universidad de Valparaiso, Gran Breta˜na 1111, Playa Ancha, Valpara´ıso 2360102, Chile
2.Institut f¨ur Physik und Astronomie, Universit¨at Potsdam, Karl-Liebknecht-Str. 24/25, D-14476 Golm, Germany
3.Yunnan Observatories, Chinese Academy of Sciences, 396 Yangfangwang, Guandu District, Kunming 650216, P. R. China
4.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, 396 Yangfangwang, Guandu District, Kunming 650216, P. R. China
5.Center for Astronomical Mega-Science, Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing 100012, P. R. China
6.Department of Physics, High Point University, One University Parkway, High Point, NC 27268, USA
7.Department of Physics, Astronomy, and Materials Science, Missouri State University, Springfield, MO 65804, USA
8.Astronomical Institute of the Czech Academy of Sciences, CZ-251 65 Ondˇrejov, Czech Republic
9.Astroserver.org, 8533 Malomsok, Hungary
Recommended Citation
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Vos, Joris,Vuckovic, Maja,Chen XF,et al. The orbital period-mass ratio relation of wide sdB plus MS binaries and its application to the stability of RLOF[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2019,482(4):4592-4605.
APA Vos, Joris.,Vuckovic, Maja.,Chen XF.,Han ZW.,Boudreaux, Thomas.,...&Nemeth, Peter.(2019).The orbital period-mass ratio relation of wide sdB plus MS binaries and its application to the stability of RLOF.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,482(4),4592-4605.
MLA Vos, Joris,et al."The orbital period-mass ratio relation of wide sdB plus MS binaries and its application to the stability of RLOF".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 482.4(2019):4592-4605.
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