Eccentric, Msini = 9 MJ companion to HD 14067

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Eccentric, Msini = 9 MJ companion to HD 14067

Post by Sirius_Alpha on 22nd September 2014, 9:24 pm

A Long-period Eccentric Substellar Companion to the Evovled Intermediate-Mass Star HD 14067
http://arxiv.org/abs/1409.6081

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.

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Re: Eccentric, Msini = 9 MJ companion to HD 14067

Post by Lazarus on 23rd September 2014, 1:26 pm

Clearly needs further monitoring to resolve the degeneracy between the models.

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