35 citations · 81 across the 4 of their papers we have counts for
6 papers
Mass Segregation in the Hyades Cluster
N. Wyn Evans, Semyeong Oh
Using the Gaia colour-magnitude diagram, we assign masses to a catalogue of 979 confirmed members of the Hyades cluster and tails. By fitting the cumulative mass profile, stars wit…
Kinematic modelling of clusters with Gaia: the Death Throes of the Hyades
Semyeong Oh, N. Wyn Evans
The precision of the Gaia data offers a unique opportunity to study the internal velocity field of star clusters. We develop and validate a forward-modelling method for the interna…
Unresolved stellar companions with Gaia DR2 astrometry
Vasily Belokurov, Zephyr Penoyre, Semyeong Oh +9
For stars with unresolved companions, motions of the centre of light and that of mass decouple, causing a single-source astrometric model to perform poorly. We show that such stars…
LRP2020: The Opportunity of Young Nearby Associations with the Advent of the Gaia Mission
Jonathan Gagné, Joel Kastner, Semyeong Oh +12
This white paper proposes leveraging high-quality Gaia data available to the worldwide scientific community and complement it with support from Canadian-related facilities to place…
Spectroscopy of the Young Stellar Association Price-Whelan 1: Origin in the Magellanic Leading Arm and Constraints on the Milky Way Hot Halo
David L. Nidever, Adrian M. Price-Whelan, Yumi Choi +7
We report spectroscopic measurements of stars in the recently discovered young stellar association Price-Whelan 1 (PW 1), which was found in the vicinity of the Leading Arm (LA) of…
Spectroscopic confirmation of very-wide stellar binaries and large-separation comoving pairs from Gaia DR1
Adrian M. Price-Whelan, Semyeong Oh, David N. Spergel
Members of widely-separated stellar binaries (> 0.1 pc) or loosely bound stellar associations and clusters are born with small spreads in kinematics and chemistry, but disrupt and…