Issue |
A&A
Volume 376, Number 1, September II 2001
|
|
---|---|---|
Page(s) | L9 - L12 | |
Section | Letters | |
DOI | https://doi.org/10.1051/0004-6361:20011024 | |
Published online | 15 September 2001 |
Is KPD 1930+2752 a good candidate type Ia supernova progenitor?
1
Physics Department, Tartu University, Ülikooli 18, 50090 Tartu, Estonia
2
Observatory, PO Box 14, 00014, University of Helsinki, Finland
3
Institute of Astronomy, 48 Pyatnitskaya Str., 109017 Moscow, Russia e-mail: afed, lry@inasan.rssi.ru
4
Astronomical Institute "Anton Pannekoek" , Kruislaan 403, 1098 SJ Amsterdam, The Netherlands
Corresponding author: E. Ergma, ene@physic.ut.ee
Received:
14
May
2001
Accepted:
16
July
2001
We investigate the evolution of a binary system which initially
has an orbital period of 2h17m and contains a 0.5 helium
star with a white dwarf companion of 0.97
, similar to the suggested
SN Ia candidate progenitor KPD 1930+2752. We show that the helium star completes
core helium burning and becomes a white dwarf before the components merge.
The most probable outcome of the merger of the components is the formation of
a massive white dwarf, despite the fact that initially the total mass of the system is
above the Chandrasekhar mass.
Key words: stars: evolution / stars: individual: KPD 1930+2752 / stars: individual: SNe Ia / stars: binaries: general
© ESO, 2001
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