HIP 79431

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HIP 79431

Post by lodp on 10th January 2010, 9:30 pm

New planet (just the one) from arXiV tonight:

http://arxiv.org/PS_cache/arxiv/pdf/1001/1001.1174v1.pdf

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Re: HIP 79431

Post by Sirius_Alpha on 10th January 2010, 9:39 pm

Cool find =). Are M2K and N2K related?

Edit: Guess so.
Modeled after the N2K program (Fischer et al. 2005), our program uses a quick-look strategy to obtain three or four nearly consecutive observations of target stars to flag short-period candidates. We then continue to obtain approximately log-spaced time series observations to detect longer period planets. Here, we present the first planet to emerge from this program.
(I corrected the title, a number was duplicated).

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Re: HIP 79431

Post by Edasich on 11th January 2010, 8:12 am

Oh good, officially announced now. A 2 Mj planet around an M Dwarf in Scorpius and in relatively close orbit.

Radius for the host star is not provided. Using crude mass-radius relationship I would get a 0.55 Solar radii. With Teff=3136 K I get habitable zone within 0.17 AUs (L=0.028 LSun).

So this planet would likely be a 47 UMa b's kin, laying beyond the stellar host's habitable zone. As if 2.11 AUs separated from a Solar-type star.
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Re: HIP 79431

Post by Lazarus on 12th January 2010, 4:17 pm

Somewhat revised parameters than the preview we got in the discovery paper for Gliese 649 b (see Borislav's post here)

Still fits the pattern that Jupiter-type planets around M dwarfs tend to be located quite far out, unlike the case of the Gliese 876 system for example. May bode well for the possibilities of potentially habitable planets around such stars.
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Re: HIP 79431

Post by Daniel on 13th January 2010, 9:12 am

On the end of this paper of HIP79431 in the Discussion part they talk about the unannounced planet of Gl 179 a M Dwarf with one jupiter mass planet 6.3 years orbit...

see at: http://solar-flux.forumandco.com/extrasolar-news-and-discoveries-f2/a-plenty-of-exoplanets-from-exoplanetsorg-t353-30.htm

i just want point out that is first time that talk about one of this planet in other scientific paper.
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Re: HIP 79431

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