Planets Around the K-Giants BD+20 274 and HD 219415

View previous topic View next topic Go down

Planets Around the K-Giants BD+20 274 and HD 219415

Post by Edasich on 3rd July 2012, 3:08 am

Planets Around the K-Giants BD+20 274 and HD 219415

We present the discovery of planet-mass companions to two giant stars by the ongoing Penn State- Toru\'n Planet Search (PTPS) conducted with the 9.2 m Hobby-Eberly Telescope. The less massive of these stars, K5-giant BD+20 274, has a 4.2 MJ minimum mass planet orbiting the star at a 578-day period and a more distant, likely stellar-mass companion. The best currently available model of the planet orbiting the K0-giant HD 219415 points to a Jupiter-mass companion in a 5.7-year, eccentric orbit around the star, making it the longest period planet yet detected by our survey. This planet has an amplitude of \sim18 m/s, comparable to the median radial velocity (RV) "jitter", typical of giant stars.

Remember BD+20 274 b? Now it's confirmed.
avatar
Edasich
dM star
dM star

Number of posts : 1502
Location : Tau Ceti g - Mid Latitudes
Registration date : 2008-06-02

View user profile

Back to top Go down

Penn State-Toruń Planet Search: planets around 2 K-giants

Post by Lazarus on 3rd July 2012, 3:11 am

Planets Around the K-Giants BD+20 274 and HD 219415

A 578-day planet around BD+20274 and a 5.7-year planet around HD 219415.
avatar
Lazarus
dG star
dG star

Number of posts : 2783
Registration date : 2008-06-12

View user profile

Back to top Go down

Re: Planets Around the K-Giants BD+20 274 and HD 219415

Post by Edasich on 3rd July 2012, 4:33 am

avatar
Edasich
dM star
dM star

Number of posts : 1502
Location : Tau Ceti g - Mid Latitudes
Registration date : 2008-06-02

View user profile

Back to top Go down

Re: Planets Around the K-Giants BD+20 274 and HD 219415

Post by Sirius_Alpha on 3rd July 2012, 5:36 am

Merged

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

Number of posts : 3416
Location : Earth
Registration date : 2008-04-06

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

Back to top Go down

Re: Planets Around the K-Giants BD+20 274 and HD 219415

Post by Lazarus on 3rd July 2012, 2:56 pm

Bleargh crosspost Smile
avatar
Lazarus
dG star
dG star

Number of posts : 2783
Registration date : 2008-06-12

View user profile

Back to top Go down

Re: Planets Around the K-Giants BD+20 274 and HD 219415

Post by jyril on 3rd July 2012, 6:00 pm

Sign of an active forum... Wink

_________________
The universe is not only stranger than we imagine, it is stranger than we can imagine.
avatar
jyril
Planetesimal
Planetesimal

Number of posts : 133
Registration date : 2008-06-09

View user profile

Back to top Go down

Re: Planets Around the K-Giants BD+20 274 and HD 219415

Post by tommi59 on 15th August 2012, 7:00 am

http://iopscience.iop.org/0004-637X/756/1/53/


Last edited by tommi59 on 15th August 2012, 9:58 am; edited 1 time in total
avatar
tommi59
Jovian
Jovian

Number of posts : 542
Age : 39
Location : Baile Atha Cliath
Registration date : 2010-07-31

View user profile

Back to top Go down

Re: Planets Around the K-Giants BD+20 274 and HD 219415

Post by Sirius_Alpha on 15th August 2012, 7:54 am

tommi59 wrote:http://iopscience.iop.org/0004-637X/756/1/53/

Merged again.

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

Number of posts : 3416
Location : Earth
Registration date : 2008-04-06

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

Back to top Go down

Re: Planets Around the K-Giants BD+20 274 and HD 219415

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