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

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

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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 language	English
Title of host publication	In: Procs of the 14th European Workshop on White Dwarfs - ASP Conference Series 334
Publisher	Astronomical Society of the Pacific
Pages	303-8
ISBN (Print)	1-58381-197-4, 978-1-58381-268-6
Publication status	Published - 2005

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title = "Subdwarf B Stars from the ESO Supernova Ia Progenitor Survey -- Observation versus Theory",

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.",

author = "T. Lisker and U. Heber and R. Napiwotzki and N. Christlieb and Z. Han and D. Homeier and D. Reimers",

note = "Original paper can be found at: http://www.astrosociety.org/pubs/cs/328.html--Copyright Astronomical Society of the Pacific",

year = "2005",

language = "English",

isbn = "1-58381-197-4",

pages = "303--8",

booktitle = "In: Procs of the 14th European Workshop on White Dwarfs - ASP Conference Series 334",

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TY - GEN

T1 - Subdwarf B Stars from the ESO Supernova Ia Progenitor Survey -- Observation versus Theory

AU - Lisker, T.

AU - Heber, U.

AU - Napiwotzki, R.

AU - Christlieb, N.

AU - Han, Z.

AU - Homeier, D.

AU - Reimers, D.

N1 - Original paper can be found at: http://www.astrosociety.org/pubs/cs/328.html--Copyright Astronomical Society of the Pacific

PY - 2005

Y1 - 2005

N2 - 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.

AB - 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.

M3 - Conference contribution

SN - 1-58381-197-4

SN - 978-1-58381-268-6

SP - 303

EP - 308

BT - In: Procs of the 14th European Workshop on White Dwarfs - ASP Conference Series 334

PB - Astronomical Society of the Pacific

ER -

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

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