A Long-period Eccentric Substellar Companion to the Evovled Intermediate-Mass Star HD 14067
We report the detection of a substellar companion orbiting an evolved intermediate-mass (M ⋆ =2.4M ⊙ ) star HD 14067 (G9 III) using precise Doppler technique. Radial velocities of this star can be well fitted either by a periodic Keplerian variation with a decreasing linear velocity trend (P=1455 days, K 1 =92.2 m s −1 , e=0.533 , and γ ˙ =−22.4 m s −1 yr −1 ) or a single Keplerian orbit without linear trend (P=2850 days, K 1 =100.1 m s −1 , and e=0.697 ). The minimum mass (m 2 sini=7.8M J for the model with a linear trend, or m 2 sini=9.0M J for the model without a linear trend) suggests a long-period giant planet around an evolved intermediate-mass star. The eccentricity of the orbit is among the highest known for planets ever detected around evolved stars.
Caps Lock: Cruise control for 'Cool'!
- Number of posts : 3416
Location : Earth
Registration date : 2008-04-06
Permissions in this forum:You cannot reply to topics in this forum