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Dynamically Produced Moving Groups in Interacting Simulations
Peter Craig, Sukanya Chakrabarti, Heidi Jo Newberg +1
We show that Smoothed Particle Hydrodynamics (SPH) simulations of dwarf galaxies interacting with a Milky Way-like disk produce moving groups in the simulated stellar disk. We anal…
New nearby hypervelocity stars and their spatial distribution from Gaia DR2
Cuihua Du, Hefan Li, Yepeng Yan +5
Base on about 4,500 large tangential velocity () with high-precision proper motions and parallaxes in Gaia DR2 5D information derived from p…
A Cold Stellar Stream in Pegasus
H. D. Perottoni, C. Martin, H. J. Newberg +3
We report the serendipitous discovery of a stellar stream in the constellation Pegasus in the south Galactic hemisphere. The stellar stream was detected using the SDSS Data Release…
An Orbit Fit to Likely Hermus Stream Stars
Charles Martin, Paul M. Amy, Heidi Jo Newberg +4
We selected blue horizontal branch (BHB) stars within the expected distance range and sky position of the Hermus Stream from Data Release 10 of the Sloan Digital Sky Survey. We ide…
The substructures in the local stellar halo from Gaia and LAMOST
Hefan Li, Cuihua Du, Shuai Liu +2
Based on the second Gaia data release (Gaia DR2) and spectroscopy from the Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST) Data, we identified 20,089 halo stars…