论文标题
URSA主要协会的低质量成员
The Low-Mass Members of the Ursa Major Association
论文作者
论文摘要
我们介绍了先前由Kounkel＆Covey（2019）鉴定出的空间型空间中的5个过度密度，该空间可能构成与附近400myr Old Ursa主要协会相关的扩展潮汐尾巴。该1599颗恒星的样本具有与Ursa Major的年龄一致的主要序列转换点，并且可能包含其缺失的低质量成员。它包括4个候选白矮人，其特性似乎与大约400 MYR一致，但我们估计，较老的白矮人闯入者的估计，大约33％的样品可能被随机的田间星污染。
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.
