dc.contributor.author | Moehler, S. | |
dc.contributor.author | Landsmann, W. | |
dc.contributor.author | Napiwotzki, R. | |
dc.date.accessioned | 2008-01-25T10:11:20Z | |
dc.date.available | 2008-01-25T10:11:20Z | |
dc.date.issued | 1998 | |
dc.identifier.citation | Moehler , S , Landsmann , W & Napiwotzki , R 1998 , ' Hot UV bright stars in globular clusters ' , Astronomy and Astrophysics , vol. 335 , pp. 510-516 . | |
dc.identifier.issn | 1432-0746 | |
dc.identifier.other | dspace: 2299/1385 | |
dc.identifier.uri | http://hdl.handle.net/2299/1385 | |
dc.description.abstract | We have obtained medium-resolution spectra of seven UV-bright stars discovered on images of four southern globular clusters obtained with the Ultraviolet Imaging Telescope (UIT). Effective temperatures, surface gravities and helium abundances are derived from LTE and non-LTE model atmosphere fits. Three of the stars have sdO spectra, including M4-Y453 (Teff = 58800 K, log g = 5.15), NGC 6723-III60 (Teff= 40600 K, log g = 4.46) and NGC 6752-B2004 (Teff = 37000 K, log g = 5.25). All seven stars lie along either post-extended horizontal branch (EHB) or post-early AGB evolutionary tracks. The post-early AGB stars show solar helium abundances, while the post-EHB stars are helium deficient, similar to their EHB progenitors. | en |
dc.format.extent | 322376 | |
dc.language.iso | eng | |
dc.relation.ispartof | Astronomy and Astrophysics | |
dc.title | Hot UV bright stars in globular clusters | en |
dc.contributor.institution | School of Physics, Astronomy and Mathematics | |
dc.contributor.institution | School of Physics, Engineering & Computer Science | |
dc.contributor.institution | Department of Physics, Astronomy and Mathematics | |
dc.contributor.institution | Centre for Astrophysics Research (CAR) | |
dc.description.status | Peer reviewed | |
rioxxterms.type | Journal Article/Review | |
herts.preservation.rarelyaccessed | true | |