Kinematics of Type II Cepheids of the Galactic Halo
Kinematics of Type II Cepheids of the Galactic Halo
Abstract In a step toward understanding the origin of the Galactic Halo, we have reexamined Type II Cepheids (T2C) in the field with new input from the second data release (DR2) of Gaia . For 45 T2C with periods from 1 to 20 days, parallaxes, proper motions, and [Fe/H] values …