The Low-Mass Members of the Ursa Major Association
Solar and Stellar Astrophysics
2020-06-19 v1 Astrophysics of Galaxies
Abstract
We present a set of 5 over-densities in spatial-kinematic space previously identified by Kounkel & Covey (2019) that may constitute extended tidal tails associated with the nearby, 400-Myr old Ursa Major association. This sample of 1599 stars have a main-sequence turnoff point consistent with the age of Ursa Major, and might contain its missing low-mass members. It includes 4 candidate white dwarfs with properties that seem consistent with a total age of about 400 Myr, but we estimate from older white dwarf interlopers that about 33% of the sample may be contaminated by random field stars.
Keywords
Cite
@article{arxiv.2006.10046,
title = {The Low-Mass Members of the Ursa Major Association},
author = {Jonathan Gagné and Jacqueline K. Faherty and Mark Popinchalk},
journal= {arXiv preprint arXiv:2006.10046},
year = {2020}
}
Comments
Submitted to Research Notes of the AAS. 5 pages