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Emission-line stars in M31 from the SPLASH and PHAT surveys
Laura J. Prichard, Puragra Guhathakurta, Katherine M. Hamren +7
We present a sample of 224 stars that emit H (H stars) in the Andromeda galaxy (M31). The stars were selected from 5000 spectra, collected as part of the Spectroscopic…
Improved Dynamical Constraints on the Mass of the central Black Hole in NGC 404
Dieu D. Nguyen, Anil C. Seth, Mark den Brok +6
We explore the nucleus of the nearby 10~early-type galaxy (ETGs), NGC~404, using Hubble Space Telescope (HST)/STIS spectroscopy and WFC3 imaging. We first present evid…
Panchromatic Hubble Andromeda Treasury XVI. Star Cluster Formation Efficiency and the Clustered Fraction of Young Stars
L. Clifton Johnson, Anil C. Seth, Julianne J. Dalcanton +10
We use the Panchromatic Hubble Andromeda Treasury (PHAT) survey dataset to perform spatially resolved measurements of star cluster formation efficiency (), the fraction of stell…
Spatial and kinematic segregation in star cluster merger remnants
David R. Cole, Victor P. Debattista, Anna Lisa Varri +2
Globular clusters which exhibit chemical and dynamical complexity have been suggested to be the stripped nuclei of dwarf galaxies (e.g., M54, Cen). We use -body simulations…
The Black Hole - Bulge Mass Relation in Megamaser Host Galaxies
Ronald Läsker, Jenny E. Greene, Anil Seth +4
We present HST images for nine megamaser disk galaxies with the primary goal of studying photometric BH-galaxy scaling relations. The megamaser disks provide the highest-precision…