Volume 450, Number 1, April IV 2006
|Page(s)||241 - 251|
|Section||Stellar structure and evolution|
|Published online||03 April 2006|
Constraints on the progenitor systems of type Ia supernovae
Max-Planck-Institut für Astrophysik, Karl-Schwarzschild-Str. 1, 85741 Garching bei München, Germany e-mail: email@example.com; firstname.lastname@example.org
2 European Southern Observatory, Karl-Schwarzschild-Str. 2, 85748 Garching bei München, Germany e-mail: email@example.com
3 Universitätssternwarte München, Scheiner-Str. 1, 81679 München, Germany e-mail: firstname.lastname@example.org
Accepted: 2 December 2005
Bolometric light curves provide a valuable insight into the nature of type Ia supernovae. We present an analysis of sixteen well-observed type Ia supernovae. Constraints are placed on several global parameters concerning the progenitor system, explosion mechanism, and subsequent radiation transport. By fitting a radioactive decay energy deposition function to the quasi-exponential phase (50 to 100 days after maximum light), it is found that the ejected mass varies by at least a factor of two. This result suggests that a sub Chandrasekhar mass white dwarf could be the progenitor system of some type Ia supernovae. We find that the range in the amount of synthesized indicates a significant variation in the burning mechanism. In order to explain a factor of ten range in the observed bolometric luminosity, more detailed modeling of the explosion mechanism is required.
Key words: stars: supernovae: general
© ESO, 2006
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