dM Proper-motion Companions to 51 Peg

View previous topic View next topic Go down

dM Proper-motion Companions to 51 Peg

Post by Sirius_Alpha on 16th March 2010, 8:58 pm

A Common Proper Motion Companion to the Exoplanet Host 51 Pegasi
http://arxiv.org/abs/1003.3032

Abstract wrote:The exoplanet host 51 Pegasi has a widely separated red dwarf companion. Two other, far more distant, stars are also co-moving with this star, showing that they are at least of common Galactic orbit due to a common origin.

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

Number of posts : 3495
Location : Earth
Registration date : 2008-04-06

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

Back to top Go down

Re: dM Proper-motion Companions to 51 Peg

Post by Lazarus on 17th March 2010, 4:04 pm

So the "51 Pegasi moving group" then?
avatar
Lazarus
dG star
dG star

Number of posts : 2845
Registration date : 2008-06-12

View user profile

Back to top Go down

Re: dM Proper-motion Companions to 51 Peg

Post by Sirius_Alpha on 17th March 2010, 5:15 pm

Sounds good to me. Are moving groups usually only a handfull of stars?

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

Number of posts : 3495
Location : Earth
Registration date : 2008-04-06

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

Back to top Go down

Re: dM Proper-motion Companions to 51 Peg

Post by Sirius_Alpha on 27th April 2010, 8:48 pm

Or maybe not.

On the Nature of the Purported Common Proper Motion Companions to the Exoplanet Host Star 51 Peg
http://arxiv.org/abs/1004.4700

Abstract wrote:Greaves (2006) proposed that three red, high proper motion stars within 10 degrees of 51 Peg (NLTT 54007, 54064, & 55547) are co-moving companions to this famous exoplanet host star. While the stars clearly have proper motions similar to 51 Peg, the inferred kinematic parallaxes for these stars produce extremely inconsistent color-magnitude positions 2 to 4 magnitudes below the main sequence. All three stars are likely to be background stars unrelated to 51 Peg.

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

Number of posts : 3495
Location : Earth
Registration date : 2008-04-06

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

Back to top Go down

Re: dM Proper-motion Companions to 51 Peg

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