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According to this article the white dwarf companion in EF Eridanus has sucked away so much of the mass of the originally normal star that accompanies it that the other star can no longer sustain fusion.

No one is yet quite sure what to call an object of this kind, since it's the first one that's actually been observed.

Date: 2004-10-07 01:52 am (UTC)
From: [identity profile] scs-11.livejournal.com
Hmmmm.... isn't an ex-star a has-been?

Date: 2004-10-07 05:05 am (UTC)
From: [identity profile] khaosworks.livejournal.com
I'm torn between calling it an "Atkins star" or "My ex-wife".

Date: 2004-10-07 08:07 am (UTC)
From: [identity profile] pbristow.livejournal.com
Beautiful star. Lovely plumage...

Call it a Norwegian Blue.

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