Publication year
2007Author(s)
Publisher
San Francisco : Astronomical Society of the Pacific
ISBN
9781583813065
In
Astronomical Society of the Pacific Conference Series, (2007)Napiwotzki, R. (ed.), 15th EUROPEAN WORKSHOP ON WHITE DWARFS: Proceedings of a meeting held in Leicester, United Kingdom, 7–11 August 2006, pp. 387-392Conference location
Leicester
ISSN
Publication type
Article in monograph or in proceedings
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Editor(s)
Napiwotzki, R.
Organization
Astrophysics
Journal title
Astronomical Society of the Pacific Conference Series
Book title
Napiwotzki, R. (ed.), 15th EUROPEAN WORKSHOP ON WHITE DWARFS: Proceedings of a meeting held in Leicester, United Kingdom, 7–11 August 2006
Page start
p. 387
Page end
p. 392
Subject
AstronomyAbstract
We report results of a systematic radial velocity survey for double degenerate (DD) binaries as potential progenitors of type Ia supernovae: SPY (ESO Supernovae Ia Progenitor surveY). More than 1000 white dwarfs (WDs) and pre-white dwarfs were observed with the VLT. The aim of SPY is to perform a statistically significant test of the DD scenario. We give an overview of the project and follow-up results. The sample is used for two tests of the contemporary picture of close binary evolution leading to DDs. It is shown that the SPY observations of low mass He-core WDs (HeWDs) are inconsistent with the idea that they all reside in close binary systems. We carry out a model atmosphere analysis of WDs residing in double-lined binaries and estimate individual cooling ages. For a number of systems the younger (and hotter) component is the less massive one, as expected. However, for some systems the mass ratio is inverted.
This item appears in the following Collection(s)
- Academic publications [238441]
- Electronic publications [122521]
- Faculty of Science [34986]
- Open Access publications [97516]
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