New brown dwarf: HD 91669B.

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New brown dwarf: HD 91669B.

Post by Sirius_Alpha on 22nd December 2008, 9:03 pm

HD 91669b: A New Brown Dwarf Candidate from the McDonald Observatory Planet Search
http://arxiv.org/abs/0812.4094

Abstract wrote:We report the detection of a candidate brown dwarf orbiting the metal-rich K dwarf HD 91669, based on radial-velocity data from the McDonald Observatory Planet Search. HD 91669b is a substellar object in an eccentric orbit (e=0.45) at a separation of 1.2 AU. The minimum mass of 30.6 Jupiter masses places this object firmly within the brown dwarf desert for inclinations i>23 degrees. This is the second rare close-in brown dwarf candidate discovered by the McDonald planet search program.

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Re: New brown dwarf: HD 91669B.

Post by Edasich on 23rd December 2008, 9:16 am

Oh nice. A brown dwarf beneath the Christmas tree Very Happy cherry santa
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Re: New brown dwarf: HD 91669B.

Post by Darkness nova on 23rd December 2008, 5:00 pm

Thats gotta be one huge tree to fit a BD under it....

A k dwarf eh........sigh and here I was excited for a few seconds when I saw 1.2 AU.

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Re: New brown dwarf: HD 91669B.

Post by NuclearVacuum on 23rd December 2008, 6:43 pm

Darkness nova wrote:Thats gotta be one huge tree to fit a BD under it....

A k dwarf eh........sigh and here I was excited for a few seconds when I saw 1.2 AU.

Are you talking about the possibility of an Earth-like moon?

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Re: New brown dwarf: HD 91669B.

Post by Sirius_Alpha on 23rd December 2008, 8:26 pm

NuclearVacuum wrote:Are you talking about the possibility of an Earth-like moon?

That's probably what he meant. Don't forget though that brown dwarfs emit their own radiation, perhaps enough to give a hypothetical moon the extra heat to compensate for the K-dwarf's cooler temperature.

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Re: New brown dwarf: HD 91669B.

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