New Results from the Supernova Ia Progenitor Survey
Kiel, Germany : Astronomical Society of the Pacific
InKoester, D.; Moehler, S. (ed.), ASP Conf. Ser. 334: 14th European Workshop on White Dwarfs, pp. 375-380
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Koester, D.; Moehler, S. (ed.), ASP Conf. Ser. 334: 14th European Workshop on White Dwarfs
Subject@Astronomical Society of the Pacific conference series; Astronomy
We report on 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 and pre-white dwarfs were observed with the VLT. Our aim is to perform a statistically significant test of the DD scenario. SPY detected more than 100 new binary white dwarfs, dramatically increasing the number of known DDs. System parameters are determined from ongoing follow-up observations. Our sample includes systems with masses close to the Chandrasekhar limit and a probable SN Ia progenitor candidate.
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