Six new HARPS planets (all Jovian)

View previous topic View next topic Go down

Six new HARPS planets (all Jovian)

Post by Sirius_Alpha on 27th October 2008, 8:09 pm

The HARPS search for southern extra-solar planets XVII. Six long-period giant planets around BD -17 0063, HD 20868, HD 73267, HD 131664, HD 145377, HD 153950
http://arxiv.org/abs/0810.4662

Abstract wrote:We report the discovery of six new substellar companions of main-sequence stars, detected through multiple Doppler measurements with the instrument HARPS installed on the ESO 3.6m telescope, La Silla, Chile. These extrasolar planets are orbiting the stars BD -17 0063, HD 20868, HD 73267, HD 131664, HD 145377, HD 153950. The orbital characteristics which best fit the observed data are depicted in this paper, as well as the stellar and planetary parameters. Masses of the companions range from 2 to 18 Jupiter masses, and periods range from 100 to 2000 days. The observational data are carefully analysed for activity-induced effects and we conclude on the reliability of the observed radial-velocity variations as of exoplanetary origin. Of particular interest is the very massive planet (or brown-dwarf companion) around the metal-rich HD 131664 with M2sini= 18.15 MJup, and a 5.34-year orbital period. These new discoveries reinforces the observed statistical properties of the exoplanet sample as known so far.

_________________
Caps Lock: Cruise control for 'Cool'!
avatar
Sirius_Alpha
Admin
Admin

Number of posts : 3468
Location : Earth
Registration date : 2008-04-06

View user profile http://solar-flux.forumandco.com/

Back to top Go down

Re: Six new HARPS planets (all Jovian)

Post by Lazarus on 28th October 2008, 1:46 pm

Yay! More eccentric planets. Hints of a 2-planet system for HD 145377 as well.
avatar
Lazarus
dG star
dG star

Number of posts : 2819
Registration date : 2008-06-12

View user profile

Back to top Go down

Re: Six new HARPS planets (all Jovian)

Post by Darkness nova on 28th October 2008, 5:53 pm

Ohh more southern planets. There also rather near sols metallicy which is interesting...

Although now whenever I hear about eccentric gaints I'm always thinking "what if there two smaller ones in resonance?"

Darkness nova
Asteroid
Asteroid

Number of posts : 69
Location : Octans
Registration date : 2008-06-12

View user profile

Back to top Go down

Re: Six new HARPS planets (all Jovian)

Post by Sirius_Alpha on 28th October 2008, 8:02 pm

Darkness nova wrote:Although now whenever I hear about eccentric gaints I'm always thinking "what if there two smaller ones in resonance?"

Yeah me too...

I wonder how wide-spread that is? I wonder the opposite of that, how many of these eccentric planets are really eccentric?

_________________
Caps Lock: Cruise control for 'Cool'!
avatar
Sirius_Alpha
Admin
Admin

Number of posts : 3468
Location : Earth
Registration date : 2008-04-06

View user profile http://solar-flux.forumandco.com/

Back to top Go down

Re: Six new HARPS planets (all Jovian)

Post by Sponsored content


Sponsored content


Back to top Go down

View previous topic View next topic Back to top


 
Permissions in this forum:
You cannot reply to topics in this forum