Subdwarf B Stars from the ESO Supernova Ia Progenitor Survey -- Observation versus Theory

T. Lisker, U. Heber, R. Napiwotzki, N. Christlieb, Z. Han, D. Homeier, D. Reimers

Research output: Chapter in Book/Report/Conference proceedingConference contribution

35 Downloads (Pure)

Abstract

We present the analysis of a high-quality sample of optical spectra for 76 sdB stars from the ESO Supernova Ia Progenitor Survey. Effective temperature, surface gravity, and photospheric helium abundance were derived from line profile fits. We demonstrate that our subsample of 52 single-lined sdB stars is a useful tool to compare observation and theory. The predictions of population synthesis models for close binary evolution are compared to our data. We show that the simulations cover the observed parameter range of sdBs, but fail to reproduce the observed distribution in detail.
Original languageEnglish
Title of host publicationIn: Procs of the 14th European Workshop on White Dwarfs - ASP Conference Series 334
PublisherAstronomical Society of the Pacific
Pages303-8
ISBN (Print)1-58381-197-4, 978-1-58381-268-6
Publication statusPublished - 2005

Fingerprint

Dive into the research topics of 'Subdwarf B Stars from the ESO Supernova Ia Progenitor Survey -- Observation versus Theory'. Together they form a unique fingerprint.

Cite this