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trinitree88
2011-Aug-16, 03:06 PM
One of the scenarios for type 1a supernovae is the slow accumulation of mass onto a white dwarf in a binary with an asymptotic giant companion. Mass loss models say different things about this, including....it may be a case by case scenario. SEE:http://arxiv.org/PS_cache/arxiv/pdf/1108/1108.2752v1.pdf


pete

Tensor
2011-Aug-16, 11:30 PM
One of the scenarios for type 1a supernovae is the slow accumulation of mass onto a white dwarf in a binary with an asymptotic giant companion. Mass loss models say different things about this, including....it may be a case by case scenario. SEE:http://arxiv.org/PS_cache/arxiv/pdf/1108/1108.2752v1.pdfpete

The paper also says "At the same time, one must acknowledge that attempting to determine qcrit for any given donor/core mass using such a code is inherently model-dependent". Which, when combined with the rest of the paper simply means, if we change the computer code (which, again according to the paper) doesn't always work1, and we use different models, we can sometimes get the results in our paper.

I'm also surprised that they didn't reference this paper (http://arxiv.org/pdf/1103.2790) by Ivanova and Chaichenets from Mar of this year. It proposes an explanation for Mass Transfer within the Common Envelope that would account for the problem in the paper you mentioned.

For some good information on binary evolution and binary mergers, see Dr Ivanova's page with her papers here (http://www.ualberta.ca/~ivanova1/lit.html). There are quite a few papers there. Her Thesis is paper #28, but her first listed paper is from 1996.


1 Also from the paper: "using STARS/ev, it is difficult to decide in principle when any given run has a true run-away, and when the problem is numerical."