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Hot Stars in Globular Cluster - A Spectroscopist's View | | S. Moehler
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9 May 2001 | | Subject: | astro-ph | | Affiliation: | Dr. Remeis-Sternwarte, Bamberg | | Abstract: | Globular clusters are ideal laboratories to study the evolution of low-mass stars. In this work we concentrate on three types of hot stars observed in globular clusters: horizontal branch stars, UV bright stars, and white dwarfs. After providing some historical background and information on gaps and blue tails we discuss extensively hot horizontal branch stars in metal-poor globular clusters, esp. their abundance anomalies and the consequences for the determination of their atmospheric parameters and evolutionary status. Hot horizontal branch stars in metal-rich globular clusters are found to form a small, but rather inhomogeneous group that cannot be explained by one evolutionary scenario. Hot UV bright stars show a lack of classic post-AGB stars that may explain the lack of planetary nebulae in globular clusters. Finally we discuss first results of spectroscopic observations of white dwarfs in globular clusters. | | Source: | arXiv, astro-ph/0105145 | | Services: | Forum | Review | PDF | Favorites | |
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