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Accurate mass and radius determinations of a cool subdwarf in an eclipsing binary

文献类型：期刊论文

作者Rebassa-Mansergas, Alberto1,2; Parsons, Steven G.3; Dhillon, Vikram S.3,4; Ren, Juanjuan5; Littlefair, Stuart P.3; Marsh, Thomas R.6; Torres, Santiago1,2
刊名NATURE ASTRONOMY
出版日期2019-06-01
卷号3期号:6页码:553-560
ISSN号2397-3366
DOI10.1038/s41550-019-0746-7
英文摘要Cool subdwarfs are metal-poor low-mass stars that formed during the early stages of the evolution of our Galaxy. Because they are relatively rare in the vicinity of the Sun, we know of few cool subdwarfs in the solar neighbourhood, and none for which both the mass and the radius are accurately determined. This hampers our understanding of stars at the low-mass end of the main sequence. Here we report the discovery of SDSSJ235524.29+044855.7 as an eclipsing binary containing a cool subdwarf star, with a white dwarf companion. From the light curve and the radial-velocity curve of the binary we determine the mass and the radius of the cool subdwarf and we derive its effective temperature and luminosity by analysing its spectral energy distribution. Our results validate the theoretical relations between mass, radius, effective temperature and luminosity for low-mass, low-metallicity stars.
WOS关键词MAIN-SEQUENCE BINARIES ; DIGITAL-SKY-SURVEY ; WHITE-DWARFS ; STARS ; EVOLUTION ; LAMOST ; MODELS
资助项目MINECO Ramon y Cajal programme[RYJ-2016-20254] ; MINECO Ramon y Cajal programme[AYA2017-86274-P] ; AGAUR grant[SGR-661/2017] ; Leverhulme Trust ; National Natural Sciences Foundation of China[U1531244] ; National Natural Sciences Foundation of China[U1831209] ; NSFC[11833006] ; Young Researcher Grant of the National Astronomical Observatories, Chinese Academy of Sciences ; European Research Council under the European Union's Seventh Framework Programme (FP/2007-2013) under ERC-2013-ADG grant[340040]
WOS研究方向Astronomy & Astrophysics
语种英语
WOS记录号WOS:000470757700021
出版者NATURE PUBLISHING GROUP
资助机构MINECO Ramon y Cajal programme ; MINECO Ramon y Cajal programme ; AGAUR grant ; AGAUR grant ; Leverhulme Trust ; Leverhulme Trust ; National Natural Sciences Foundation of China ; National Natural Sciences Foundation of China ; NSFC ; NSFC ; Young Researcher Grant of the National Astronomical Observatories, Chinese Academy of Sciences ; Young Researcher Grant of the National Astronomical Observatories, Chinese Academy of Sciences ; European Research Council under the European Union's Seventh Framework Programme (FP/2007-2013) under ERC-2013-ADG grant ; European Research Council under the European Union's Seventh Framework Programme (FP/2007-2013) under ERC-2013-ADG grant ; MINECO Ramon y Cajal programme ; MINECO Ramon y Cajal programme ; AGAUR grant ; AGAUR grant ; Leverhulme Trust ; Leverhulme Trust ; National Natural Sciences Foundation of China ; National Natural Sciences Foundation of China ; NSFC ; NSFC ; Young Researcher Grant of the National Astronomical Observatories, Chinese Academy of Sciences ; Young Researcher Grant of the National Astronomical Observatories, Chinese Academy of Sciences ; European Research Council under the European Union's Seventh Framework Programme (FP/2007-2013) under ERC-2013-ADG grant ; European Research Council under the European Union's Seventh Framework Programme (FP/2007-2013) under ERC-2013-ADG grant ; MINECO Ramon y Cajal programme ; MINECO Ramon y Cajal programme ; AGAUR grant ; AGAUR grant ; Leverhulme Trust ; Leverhulme Trust ; National Natural Sciences Foundation of China ; National Natural Sciences Foundation of China ; NSFC ; NSFC ; Young Researcher Grant of the National Astronomical Observatories, Chinese Academy of Sciences ; Young Researcher Grant of the National Astronomical Observatories, Chinese Academy of Sciences ; European Research Council under the European Union's Seventh Framework Programme (FP/2007-2013) under ERC-2013-ADG grant ; European Research Council under the European Union's Seventh Framework Programme (FP/2007-2013) under ERC-2013-ADG grant ; MINECO Ramon y Cajal programme ; MINECO Ramon y Cajal programme ; AGAUR grant ; AGAUR grant ; Leverhulme Trust ; Leverhulme Trust ; National Natural Sciences Foundation of China ; National Natural Sciences Foundation of China ; NSFC ; NSFC ; Young Researcher Grant of the National Astronomical Observatories, Chinese Academy of Sciences ; Young Researcher Grant of the National Astronomical Observatories, Chinese Academy of Sciences ; European Research Council under the European Union's Seventh Framework Programme (FP/2007-2013) under ERC-2013-ADG grant ; European Research Council under the European Union's Seventh Framework Programme (FP/2007-2013) under ERC-2013-ADG grant
源URL[http://ir.bao.ac.cn/handle/114a11/26448]  
专题中国科学院国家天文台
通讯作者Rebassa-Mansergas, Alberto
作者单位1.Univ Politecn Cataluna, Dept Fis, Castelldefels, Spain
2.Inst Estudis Espacials Catalunya, Barcelona, Spain
3.Univ Sheffield, Dept Phys & Astron, Sheffield, S Yorkshire, England
4.Inst Astrofis Canarias, Tenerife, Spain
5.Chinese Acad Sci, Natl Astron Observ, Key Lab Opt Astron, Beijing, Peoples R China
6.Univ Warwick, Dept Phys, Coventry, W Midlands, England
推荐引用方式
GB/T 7714		 Rebassa-Mansergas, Alberto,Parsons, Steven G.,Dhillon, Vikram S.,et al. Accurate mass and radius determinations of a cool subdwarf in an eclipsing binary[J]. NATURE ASTRONOMY,2019,3(6):553-560.
APA Rebassa-Mansergas, Alberto.,Parsons, Steven G..,Dhillon, Vikram S..,Ren, Juanjuan.,Littlefair, Stuart P..,...&Torres, Santiago.(2019).Accurate mass and radius determinations of a cool subdwarf in an eclipsing binary.NATURE ASTRONOMY,3(6),553-560.
MLA Rebassa-Mansergas, Alberto,et al."Accurate mass and radius determinations of a cool subdwarf in an eclipsing binary".NATURE ASTRONOMY 3.6(2019):553-560.

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