A long-period eccentric substellar companion to the evolved intermediate-mass star HD 14067

Abstract

We report on the detection of a substellar companion orbiting an evolved intermediate-mass (M?∈=∈2.4∈M) star HD∈14067 (G9∈III) using a precise Doppler technique. Either a periodic Keplerian variation with a decreasing linear velocity trend (P∈=∈1455∈d, K1∈=∈92.2∈m∈s-1, e∈=∈0.533, and $\dot {\gamma } = -22.4\:$m∈s-1∈yr-1) or a single Keplerian orbit without linear trend (P∈=∈2850∈d, K1∈=∈100.1∈m∈s-1, and e∈=∈0.697) can be well fitted to the radial velocities of this star. The minimum mass (m2∈sin∈i∈=∈7.8∈MJ for the model with a linear trend, or m2∈sin∈i∈=∈9.0∈MJ for the model without a linear trend) suggests a long-period giant planet orbiting an evolved intermediate-mass star. The eccentricity of the orbit is among the highest ones ever detected for planets moving around evolved stars.