Issue |
A&A
Volume 450, Number 1, April IV 2006
|
|
---|---|---|
Page(s) | 241 - 251 | |
Section | Stellar structure and evolution | |
DOI | https://doi.org/10.1051/0004-6361:20053652 | |
Published online | 03 April 2006 |
Constraints on the progenitor systems of type Ia supernovae
1
Max-Planck-Institut für Astrophysik, Karl-Schwarzschild-Str. 1, 85741 Garching bei München, Germany e-mail: stritzin@mpa-garching.mpg.de; max@astro.ku.dk
2
European Southern Observatory, Karl-Schwarzschild-Str. 2, 85748 Garching bei München, Germany e-mail: bleibundgut@eso.org
3
Universitätssternwarte München, Scheiner-Str. 1, 81679 München, Germany e-mail: swalch@usm.uni-muenchen.de
Received:
17
June
2005
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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