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View Full Version : Two Stars Merge Into One, Trigger Nova



SagittariusAStar
2010-Dec-13, 07:32 PM
From Nature (http://www.nature.com/news/2010/101207/full/news.2010.654.html):

For the first time, astronomers have watched the spiralling dance performed by two stars merging into a single star. The observations, taken between 2001 and 2008, suggest a solution to the vexed problem of how rare 'red novae' form.

baric
2010-Dec-13, 11:39 PM
wow, that's pretty cool. Thanks for the link!

Tom Mazanec
2010-Dec-19, 10:41 AM
It would be quite interesting to see a red nova 13 parsecs away when 44 Bo÷tis B merges.

Glom
2010-Dec-19, 05:41 PM
When the two cores come together, do we get some extra fusion? A burst of helium and lithium fusion?

BigDon
2010-Dec-19, 07:25 PM
I think so. Isn't this how "blue stragglers" are formed?

Glom
2010-Dec-21, 10:13 PM
It would surely only be brief though. The pressure of the extra luminosity would expand the core, thereby reducing the fusion.

BigDon
2010-Dec-26, 12:22 AM
http://en.wikipedia.org/wiki/Blue_straggler

This is what I mean Glom.

Two stars that merge become bluer than stars that age should be. Merging doesn't change how old the stars are, only how young they appear.