LP 543-25 or PSS 544-7 is a high proper-motion star located 458 pc from the Sun in the constellation of Canis Minor; it has been argued that it could be a candidate cannonball star ejected by a star cluster. Here, we revisit the issue of the kinematics of this interesting star using Gaia DR2. The heliocentric Galactic velocity components are (U, V, W) = (206, -289, 30) km/s; the corresponding Galactocentric Galactic velocity components show that LP 543-25 is moving in the Galactic plane and away from the Galactic Center at a rate of nearly 200 km/s, which is compatible with an origin in one of the multiple star clusters that inhabit the inner regions of the Milky Way. LP 543-25 appears to be a member of an elusive class of stars, the low-mass runaway stars. It is perhaps one of the closest and less massive runaway stars identified so far.
@article{arxiv.1805.06423,
title = {LP 543-25: a rare low-mass runaway disk star},
author = {R. de la Fuente Marcos and C. de la Fuente Marcos},
journal= {arXiv preprint arXiv:1805.06423},
year = {2018}
}
Comments
3 pages, 1 figure. Accepted for publication in Research Notes of the AAS