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The survey of Planetary Nebulae in Andromeda (M31) II. Age-velocity dispersion relation in the disc from Planetary Nebulae
Souradeep Bhattacharya, Magda Arnaboldi, Nelson Caldwell +7
The age-velocity dispersion relation is an important tool to understand the evolution of the disc of the Andromeda galaxy (M31) in comparison with the Milky Way. We use Planetary N…
A Lower Limit on the Mass of Our Galaxy from the H3 Survey
Dennis Zaritsky, Charlie Conroy, Huanian Zhang +5
The timing argument provides a lower limit on the mass of the Milky Way. We find, using a sample of 32 stars at kpc drawn from the H3 Spectroscopic Survey and mock catalog…
Resolving the Metallicity Distribution of the Stellar Halo with the H3 Survey
Charlie Conroy, Rohan P. Naidu, Dennis Zaritsky +4
The Galactic stellar halo is predicted to have formed at least partially from the tidal disruption of accreted dwarf galaxies. This assembly history should be detectable in the orb…
Mapping the Stellar Halo with the H3 Spectroscopic Survey
Charlie Conroy, Ana Bonaca, Phillip Cargile +8
Modern theories of galaxy formation predict that the Galactic stellar halo was hierarchically assembled from the accretion and disruption of smaller systems. This hierarchical asse…
Signatures of Tidal Disruption in Ultra-Faint Dwarf Galaxies: A Combined HST, Gaia, and MMT/Hectochelle Study of Leo V
Burçin Mutlu-Pakdil, David J. Sand, Matthew G. Walker +10
The ultra-faint dwarf galaxy Leo V has shown both photometric overdensities and kinematic members at large radii, along with a tentative kinematic gradient, suggesting that it may…
The survey of Planetary Nebulae in Andromeda (M31): I. Imaging the disk and halo with MegaCam@CFHT
Souradeep Bhattacharya, Magda Arnaboldi, Johanna Hartke +4
The Andromeda (M31) galaxy subtends nearly 100 sq. deg. on the sky, with severe contamination from the Milky Way halo stars whose surface density displays a steep gradient across t…