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View Full Version : type 1a supernovae in near-infrared as standard candles



trinitree88
2009-Feb-06, 07:42 PM
Here's an interesting take on type1a standard candles. There seems to be a path to accumulating a database for their furure use as standard candles. I believe the axisymmetric outflows will still require polarization data and an angle fit. The thermal images will not be spherically symmetric. pete

see:http://arxiv.org/list/astro-ph/new

Jerry
2009-Feb-07, 05:42 AM
Oh come on! Don't let the observational facts disturb an otherwise perfectly good theory!

trinitree88
2009-Feb-07, 05:31 PM
Oh come on! Don't let the observational facts disturb an otherwise perfectly good theory!

:lol::shifty::lol: pete

Kwalish Kid
2009-Feb-07, 07:42 PM
Here's an interesting take on type1a standard candles. There seems to be a path to accumulating a database for their furure use as standard candles. I believe the axisymmetric outflows will still require polarization data and an angle fit. The thermal images will not be spherically symmetric. pete

see:http://arxiv.org/list/astro-ph/new
That link is incorrect.

Spaceman Spiff
2009-Feb-08, 04:49 AM
Sigh....It's here (http://arxiv.org/abs/0711.206).

Kwalish Kid
2009-Feb-09, 01:45 AM
Is that a joke? I did find that link amusing!

Nereid
2009-Feb-09, 02:40 AM
Well, there seem to be no Friday, 6 Feb astro-ph papers on Ia SNe, and two dated Thu 5th:

The rate of type Ia Supernovae and the star formation history (http://arxiv.org/abs/0902.0700)

Comparative Direct Analysis of Type Ia Supernova Spectra. V. Insights from A Larger Sample and Quantitative Subclassification (http://arxiv.org/abs/0902.0745)

Of the two, the second seems closest to the OP's description, but it's still a bit of a stretch ...

So what was the paper, trinitree88?

Spaceman Spiff
2009-Feb-09, 03:18 AM
Sorry about that. It's here (http://arxiv.org/abs/0711.2068).

trinitree88 simply linked to the "new articles" page, which of course was not specific to the article he was pointing to and became out of date as Monday's articles became posted (especially since the article he pointed to that appeared on the Friday Feb 6, 2009 astro-ph is a revised/reposting of an article that originally appeared on astro-ph in November of 2007). My link pointed to his article, but somehow had the last digit cut off.

Kwalish Kid
2009-Feb-09, 04:31 PM
Thanks, Spiff. A promising line of research; I hope it works out. I don't have time to read it in depth, unfortunately, but it looks to show absolutely no signs of significant polarization or orientation for these events.

trinitree88
2009-Feb-09, 04:48 PM
Thanks, Spiff. A promising line of research; I hope it works out. I don't have time to read it in depth, unfortunately, but it looks to show absolutely no signs of significant polarization or orientation for these events.

Kwalish, SpacemanSpiff. Sorry about that. I was having trouble with the cut& paste on a different computer, with some idiosyncrasies....as opposed to my own idiocy. Pete