3 papers
astro-ph.GA2021
A LAMOST BHB Catalog and Kinematics Therein I: Catalog and Halo Properties
John J. Vickers, Zhao-Yu Li, Martin C. Smith +1
We collect a sample of stars observed both in LAMOST and Gaia which have colors implying a temperature hotter than 7000 K. We train a machine learning algorithm on LAMOST spectrosc…
astro-ph.GA2018
The Lives of Stars: Insights From the TGAS-RAVE-LAMOST Dataset
John J. Vickers, Martin C. Smith
In this paper we investigate how the chemical and kinematic properties of stars vary as a function of age. Using data from a variety of photometric, astrometric and spectroscopic s…
astro-ph.GA2016
A Global Correction to PPMXL Proper Motions
John J. Vickers, Siegfried Roeser, Eva K. Grebel
In this paper we notice that extragalactic sources seem to have non-zero proper motions in the PPMXL proper motion catalog. We collect a large, all-sky sample of extragalactic obje…