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dc.contributor.authorKawka, Adela
dc.contributor.authorSimpson, Jeffrey D
dc.contributor.authorVennes, Stephane
dc.contributor.authorBessell, Michael S
dc.contributor.authorDa Costa, Gary S
dc.contributor.authorMarino, Anna F
dc.contributor.authorMurphy, Simon J
dc.date.accessioned2020-07-15T05:55:38Z
dc.date.available2020-07-15T05:55:38Z
dc.date.issued2020
dc.identifier.citationKawka, A. and Simpson, J.D. and Vennes, S. and Bessell, M.S. and Da Costa, G.S. and Marino, A.F. and Murphy, S.J. 2020. The closest extremely low-mass white dwarf to the Sun. Monthly Notices of the Royal Astronomical Society: Letters. 495 (1): pp. L129-L134.
dc.identifier.urihttp://hdl.handle.net/20.500.11937/80039
dc.identifier.doi10.1093/mnrasl/slaa068
dc.description.abstract

We present the orbit and properties of 2MASS J050051.85-093054.9, establishing it as the closest (d ~ 71 pc) extremely low mass white dwarf to the Sun. We find that this star is hydrogen-rich with Teff ~ 10 500 K, log g ~ 5.9, and, following evolutionary models, has a mass of ~ 0.17 solar masses. Independent analysis of radial velocity and TESS photometric time series reveals an orbital period of ~ 9.5 h. Its high velocity amplitude (K ~ 144 km/s) produces a measurable Doppler beaming effect in the TESS light curve with an amplitude of 1 mmag. The unseen companion is most likely a faint white dwarf. J0500-0930 belongs to a class of post-common envelope systems that will most likely merge through unstable mass transfer and in specific circumstances lead to Type Ia supernova explosions.

dc.languageEnglish
dc.publisherOXFORD UNIV PRESS
dc.relation.urihttp://dx.doi.org/10.1093/mnrasl/slaa068
dc.relation.sponsoredbyhttp://purl.org/au-research/grants/arc/DP180101791
dc.relation.sponsoredbyhttp://purl.org/au-research/grants/arc/DP150103294
dc.subjectScience & Technology
dc.subjectPhysical Sciences
dc.subjectAstronomy & Astrophysics
dc.subjectbinaries: close
dc.subjectstars: individual: 2MASS J050051.85-093054.9
dc.subjectwhite dwarfs
dc.subjectSPECTRAL-ANALYSIS
dc.subjectKEPLER
dc.titleThe closest extremely low-mass white dwarf to the Sun
dc.typeJournal Article
dcterms.source.volume495
dcterms.source.number1
dcterms.source.startPageL129
dcterms.source.endPageL134
dcterms.source.issn0035-8711
dcterms.source.titleMonthly Notices of the Royal Astronomical Society: Letters
dc.date.updated2020-07-15T05:55:36Z
curtin.note

This is a pre-copyedited, author-produced version of an article accepted for publication in Monthly Notices of the Royal Astronomical Society: Letters, following peer review. The version of record Kawka, A. and Simpson, J.D. and Vennes, S. and Bessell, M.S. and Da Costa, G.S. and Marino, A.F. and Murphy, S.J. 2020. The closest extremely low-mass white dwarf to the Sun. Monthly Notices of the Royal Astronomical Society. 495 (1): pp. L129-L134 is available online at: https://doi.org/10.1093/mnrasl/slaa068.

curtin.departmentSchool of Electrical Engineering, Computing and Mathematical Sciences (EECMS)
curtin.accessStatusOpen access
curtin.facultyFaculty of Science and Engineering
curtin.contributor.orcidKawka, Adela [0000-0002-4485-6471]
dcterms.source.eissn1365-2966


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