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[astro-ph/0609616] The type Ia supernova SNLS-03D3bb from a

Posted: January 27 2007
by Alessandro Melchiorri
Hi,

This paper sounds to me like a very interesting result, but no one discussed it on cosmocoffee (unless I missed some posts) !
You have a SN-Ia supernovae from a white dwarf with mass greater than the
Chandrasekhar mass !
This paper went out on Nature last September, any comment or progress after ?

Cheers
Alessandro

Re: [astro-ph/0609616] The type Ia supernova SNLS-03D3bb fro

Posted: January 27 2007
by Tommy Anderberg
Alessandro Melchiorri wrote:This paper sounds to me like a very interesting result, but no one discussed it on cosmocoffee (unless I missed some posts) !
It was fist mentioned here, under "Cosmological model". I found the possible connection to the Middleditch paper astro-ph/0608386 interesting. He didn't comment at the time, but subsequently mentioned it in the thread on Vishwakarma's supernova paper. Then astro-ph/0611902 came out, and as far as I can see it throws some cold water on the idea that core merger events are frequently occurring, since they consistently see central symmetry, with the asymmetry emerging further out. Granted, their sample is small.

When I last checked (late December) two unanswered questions loomed big in my little mind:

1) Is SNLS-03D3bb a freak or the tip of an iceberg (i.e. unusually large mass but otherwise unexceptional, meaning there is a larger population of smaller ones contaminating SNe Ia data)?

2) What's the effect of astro-ph/0611902 on luminosity/distance error bars in cold, hard numbers?