On the kinematics of a runaway Be star population
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Abstract
We explore the hypothesis that B type emission-line stars (Be stars) have
their origin in mass-transfer binaries by measuring the fraction of runaway Be
stars. We assemble the largest-to-date catalogue of 632 Be stars with 6D
kinematics, exploiting the precise astrometry of the Tycho-Gaia Astrometric
Solution (TGAS) from the first Gaia Data Release. Using binary stellar
evolution simulations, we make predictions for the runaway and equatorial
rotation velocities of a runaway Be star population. Accounting for
observational biases, we calculate that if all classical Be stars originated
through mass transfer in binaries, then
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1365-2966