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View Full Version : Colliding White Dwarfs Could Create a Supergiant Star



Fraser
2007-Jan-17, 01:53 AM
Of all the stars in our galaxy, two classes, known as hydrogen-deficient and R Coronae Borealis are extremely rare. Only a few dozen have been discovered in our entire galaxy. ...

Read the full blog entry (http://www.universetoday.com/2007/01/16/colliding-white-dwarfs-could-create-a-supergiant-star/)

Leafguy
2007-Jan-17, 04:31 PM
Is there any estimate towards a time frame instead of "briefly"? Are we talking hundreds, thousands, hundreds of thousands or millions of years?

John Mendenhall
2007-Jan-17, 06:12 PM
Is there any estimate towards a time frame instead of "briefly"? Are we talking hundreds, thousands, hundreds of thousands or millions of years?

Check the link in the full blog. They reference 'several years' for some other oddities.

stardust99
2007-Jan-17, 10:34 PM
"Over the course of the next 25 billion years or so, it slowly cools down to the ambient temperature of the Universe."......surely this must be a typo, since the universe is currently believed to be not much older than 13.5 billion years old. Do you mean 25 million?

stardust99
2007-Jan-17, 10:41 PM
I think I get it. In another 11.5 billion years, more or less, the ambient temperature of the universe will be the same as that of 25 billion year old white dwarf stars. O.K., I'll stick around to check on the accuracy of your prediction. ;-)

TuTone
2007-Jan-18, 12:35 AM
Is this just a theory or did they actually view this happening?

RUF
2007-Jan-19, 01:51 AM
"Over the course of the next 25 billion years or so, it slowly cools down to the ambient temperature of the Universe

That is how long it will take the white dwarf to "die." Some red dwarfs may be around for trillions of years.