Binary White Dwarfs in the Supernova Ia Progenitor Survey

Details Binary White Dwarfs in the Supernova Ia Progenitor Survey Binary White Dwarfs in the Supernova Ia Progenitor Survey

Sep 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aspc..372..387n&link_type=abstract

15th European Workshop on White Dwarfs ASP Conference Series, Vol. 372, proceedings of the conference held 7-11 August, 2006 in

Astronomy and Astrophysics

Astronomy

20

Scientific paper

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.

Affiliated with

Also associated with

No associations

Rating

Binary White Dwarfs in the Supernova Ia Progenitor Survey does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Binary White Dwarfs in the Supernova Ia Progenitor Survey, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Binary White Dwarfs in the Supernova Ia Progenitor Survey will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-962496