Hostname: page-component-cd9895bd7-7cvxr Total loading time: 0 Render date: 2024-12-27T14:50:20.501Z Has data issue: false hasContentIssue false
  • English
  • Français

Anomalies in horizontal branch starsof globular clusters and SdB stars

Published online by Cambridge University Press:  13 January 2006

G. Alecian ,
O. Richard ,
S. Vauclair  and
A. Recio-Blanco
A. Recio-Blanco*
Affiliation:
Dept. Cassioppée, UMR 6202, Observatoire de la Côte d'Azur, BP. 4229, Nice Cedex 04, France
Get access

Abstract

I review the chemical abundance measurements of blue horizontal branch starswithin the theoretical framework of diffusion and radiative levitation.The present observational scenario reports normal abundances for stars cooler than Teff ~ 11 000 K, while largely anomalous abundances for hotter stars are found. In particular, large He depletions and overabundances of Fe, Ti, Cr, P and Mn are present. On the contrary, the abundances of Mg, Si andCa are roughly normal, in the hot stars as well as in the cooler ones.Related physical properties as stellar rotation will be also described.

Type
Research Article
Information
European Astronomical Society Publications Series , Volume 17: Element Stratification in Stars: 40 Years of Atomic Diffusion , 2005 , pp. 263 - 272
Copyright
© EAS, EDP Sciences, 2005

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)