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3D stellar kinematics at the Galactic center: measuring the nuclear star cluster spatial density profile, black hole mass, and distance
T. Do, G. D. Martinez, S. Yelda +6
We present 3D kinematic observations of stars within the central 0.5 pc of the Milky Way nuclear star cluster using adaptive optics imaging and spectroscopy from the Keck telescope…
The Universal Stellar Mass-Stellar Metallicity Relation for Dwarf Galaxies
Evan N. Kirby, Judith G. Cohen, Puragra Guhathakurta +3
We present spectroscopic metallicities of individual stars in seven gas-rich dwarf irregular galaxies (dIrrs), and we show that dIrrs obey the same mass-metallicity relation as the…
On the stark difference in satellite distributions around the Milky Way and Andromeda
Basilio Yniguez, Shea Garrison-Kimmel, Michael Boylan-Kolchin +1
We compare spherically-averaged radial number counts of bright (> 10^5 Lsun) dwarf satellite galaxies within 400 kpc of the Milky Way (MW) and M31 and find that the MW satellites a…