HD 4732 - A pair of giant planets

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HD 4732 - A pair of giant planets

Post by Sirius_Alpha on 25th October 2012, 10:39 pm

A Double Planetary System around the Evolved Intermediate-Mass Star HD 4732
http://arxiv.org/abs/1210.6798

We report the detection of a double planetary system orbiting around the evolved intermediate-mass star HD 4732 from precise Doppler measurements at Okayama Astrophysical Observatory (OAO) and Anglo-Australian Observatory (AAO). The star is a K0 subgiant with a mass of 1.7 M_sun and solar metallicity. The planetary system is composed of two giant planets with minimum mass of msini=2.4 M_J, orbital period of 360.2 d and 2732 d, and eccentricity of 0.13 and 0.23, respectively. Based on dynamical stability analysis for the system, we set the upper limit on the mass of the planets to be about 28 M_J (i>5 deg) in the case of coplanar prograde configuration.

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Re: HD 4732 - A pair of giant planets

Post by Lazarus on 26th October 2012, 7:30 am

Looks like the outer planet might be in the habitable zone, though given the mass of the star and evolutionary state this probably won't last particularly long on a geological timescale.
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Re: HD 4732 - A pair of giant planets

Post by Sirius_Alpha on 22nd July 2013, 2:38 am

Now on the EPE.
http://exoplanet.eu/catalog/hr_228_b/
http://exoplanet.eu/catalog/hr_228_c/

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Re: HD 4732 - A pair of giant planets

Post by Edasich on 25th July 2013, 2:11 pm

Sirius_Alpha wrote:Now on the EPE.
http://exoplanet.eu/catalog/hr_228_b/
http://exoplanet.eu/catalog/hr_228_c/
 
At last, I say! Very Happy
 
Plus sometimes Extrasolar Visions II link disappears from my Favourites redirecting me at forumandco.com home page. So nasty Evil or Very Mad
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