A FEROS Survey of Hot Subdwarf Stars
| dc.contributor.author | Vennes, S. | |
| dc.contributor.author | Németh, P. | |
| dc.contributor.author | Kawka, Adela | |
| dc.date.accessioned | 2019-02-19T04:15:19Z | |
| dc.date.available | 2019-02-19T04:15:19Z | |
| dc.date.created | 2019-02-19T03:58:18Z | |
| dc.date.issued | 2018 | |
| dc.identifier.citation | Vennes, S. and Németh, P. and Kawka, A. 2018. A FEROS Survey of Hot Subdwarf Stars. Open Astronomy. 27 (1): pp. 7-13. | |
| dc.identifier.uri | http://hdl.handle.net/20.500.11937/73943 | |
| dc.identifier.doi | 10.1515/astro-2018-0005 | |
| dc.description.abstract |
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.title | A FEROS Survey of Hot Subdwarf Stars | |
| dc.type | Journal Article | |
| dcterms.source.volume | 27 | |
| dcterms.source.number | 1 | |
| dcterms.source.startPage | 7 | |
| dcterms.source.endPage | 13 | |
| dcterms.source.issn | 2543-6376 | |
| dcterms.source.title | Open Astronomy | |
| curtin.department | Curtin Institute of Radio Astronomy (Physics) | |
| curtin.accessStatus | Fulltext not available |
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