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dc.contributor.authorVennes, S.
dc.contributor.authorNémeth, P.
dc.contributor.authorKawka, Adela
dc.date.accessioned2019-02-19T04:15:19Z
dc.date.available2019-02-19T04:15:19Z
dc.date.created2019-02-19T03:58:18Z
dc.date.issued2018
dc.identifier.citationVennes, S. and Németh, P. and Kawka, A. 2018. A FEROS Survey of Hot Subdwarf Stars. Open Astronomy. 27 (1): pp. 7-13.
dc.identifier.urihttp://hdl.handle.net/20.500.11937/73943
dc.identifier.doi10.1515/astro-2018-0005
dc.description.abstract

© 2018 M. V. Ryabova et al. We have completed a survey of twenty-two ultraviolet-selected hot subdwarfs using the Fiber-fed Extended Range Optical Spectrograph (FEROS) and the 2.2-m telescope at La Silla. The sample includes apparently single objects as well as hot subdwarfs paired with a bright, unresolved companion. The sample was extracted from our GALEX catalogue of hot subdwarf stars. We identified three new short-period systems (P = 3.5 hours to 5 days) and determined the orbital parameters of a long-period (P = 62d.66) sdO plus G III system. This particular system should evolve into a close double degenerate system following a second common envelope phase.We also conducted a chemical abundance study of the subdwarfs: Some objects show nitrogen and argon abundance excess with respect to oxygen. We present key results of this programme.

dc.titleA FEROS Survey of Hot Subdwarf Stars
dc.typeJournal Article
dcterms.source.volume27
dcterms.source.number1
dcterms.source.startPage7
dcterms.source.endPage13
dcterms.source.issn2543-6376
dcterms.source.titleOpen Astronomy
curtin.departmentCurtin Institute of Radio Astronomy (Physics)
curtin.accessStatusFulltext not available


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