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[vsnet-j 561] Re: On helium novae (Starrfield)
- Date: Thu, 18 Jan 2001 20:33:36 +0900 (JST)
- To: vsnet-chat@kusastro.kyoto-u.ac.jp, vsnet-campaign-nova@kusastro.kyoto-u.ac.jp, vsnet-j@kusastro.kyoto-u.ac.jp
- From: Hitoshi YAMAOKA <yamaoka@rc.kyushu-u.ac.jp>
- Subject: [vsnet-j 561] Re: On helium novae (Starrfield)
- Sender: owner-vsnet-j@kusastro.kyoto-u.ac.jp
Dear all,
> I do not want to get involved in the discussion about
> V445 but I do want to point out that Ron Taam and students
> looked at the consequences of helium accretion onto white
> dwarfs a long time ago. They found a detonation and a quite
> extreme explosion - if I remember correctly. It would not
> look like this object.
Yes, the ignition on the bottom of the accreted helium layer will lead
the central carbon ignition, which will become a SN Ia. Such model
are called as "double detonation". See e.g. Livne and Arnett (1995)
ApJ, 452, 62, or Woosley and Weaver (1994) ApJ, 423, 371.
So, a "helium nova" or "dwarf supernova" (Iben and Tutukov, 1991) are
thought not to occur.
Sincerely Yours,
Hitoshi Yamaoka, Kyushu Univ., Japan
yamaoka@rc.kyushu-u.ac.jp