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- W2950447773 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." @default.
- W2950447773 created "2019-06-27" @default.
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- W2950447773 date "1998-03-27" @default.
- W2950447773 modified "2023-09-25" @default.
- W2950447773 title "Hot UV bright stars in globular clusters" @default.
- W2950447773 hasPublicationYear "1998" @default.
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