Hot stars in globular clusters: A spectroscopist's view

Authors
Citation
S. Moehler, Hot stars in globular clusters: A spectroscopist's view, PUB AST S P, 113(788), 2001, pp. 1162-1177
Citations number
179
Language
INGLESE
art.tipo
Review
Categorie Soggetti
Space Sciences
Journal title
PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC
ISSN journal
0004-6280 → ACNP
Volume
113
Issue
788
Year of publication
2001
Pages
1162 - 1177
Database
ISI
SICI code
0004-6280(200110)113:788<1162:HSIGCA>2.0.ZU;2-X
Abstract
Globular clusters are ideal laboratories to study the evolution of low- mas s stars. In this work we concentrate on three types of hot stars observed i n globular clusters: horizontal branch stars, UV-bright stars, and white dw arfs. After providing some historical background and information on gaps an d blue tails, we discuss extensively hot horizontal branch stars in metal-p oor globular clusters, especially their abundance anomalies and the consequ ences for the determination of their atmospheric parameters and evolutionar y status. Hot horizontal branch stars in metal-rich globular clusters are f ound to form a small but rather inhomogeneous group that cannot be explaine d by one evolutionary scenario. Hot UV-bright stars show a lack of classic post-asymptotic giant branch stars that may explain the lack of planetary n ebulae in globular clusters. Finally, we discuss first results of spectrosc opic observations of white dwarfs in globular clusters.