Existence of the Metal-Rich Stellar Halo and High-velocity Thick Disk in the Galaxy
Yepeng Yan,
Cuihua Du,
Hefan Li
et al.
Abstract:Based on the second Gaia data release (DR2), combined with the LAMOST and APOGEE spectroscopic surveys, we study the kinematics and metallicity distribution of the high-velocity stars that have a relative speed of at least 220 km s −1 with respect to the local standard of rest in the Galaxy. The rotational velocity distribution of the high-velocity stars with [Fe/H] > −1.0 dex can be well described by a two-Gaussian model, with peaks at V φ ∼ +164.2 ± 0.7 and V φ ∼ +3.0 ± 0.3 km s −1 , associated with the thic… Show more
Set email alert for when this publication receives citations?
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.