BD+20 1790 radial velocity curve

The young active star BD +20 1790 has been inferred to host a substellar companion from radial-velocity measurements that detected the reflex motion induced on the parent star....针对年轻活动恒星BD +20 1790，研究人员通过视向速度（radial velocity）测量——该测量成功检测到了母星受伴星引力诱导产生的反冲运动——推断其拥有一颗亚恒星伴星。