Sirius_Alpha
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Number of posts : 4320
Location : Earth
Registration date : 2008-04-06
 | | Subject: HD 4732 - A pair of giant planets 25th October 2012, 10:39 pm | |
| A Double Planetary System around the Evolved Intermediate-Mass Star HD 4732 http://arxiv.org/abs/1210.6798 - Quote :
- 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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Lazarus
dF star
Number of posts : 3337
Registration date : 2008-06-12
| | Subject: Re: HD 4732 - A pair of giant planets 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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Sirius_Alpha
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Number of posts : 4320
Location : Earth
Registration date : 2008-04-06
| | Subject: Re: HD 4732 - A pair of giant planets 22nd July 2013, 2:38 am | |
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Edasich
dK star
Number of posts : 2297
Location : Tau Ceti g - Mid Latitudes
Registration date : 2008-06-02
| | Subject: Re: HD 4732 - A pair of giant planets 25th July 2013, 2:11 pm | |
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