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Constraining the age of the NGC 4565 HI Disk Warp: Determining the Origin of Gas Warps
David J. Radburn-Smith, Roelof S. de Jong, David Streich +7
We have mapped the distribution of young and old stars in the gaseous HI warp of NGC 4565. We find a clear correlation of young stars (<600 Myr) with the warp, but no coincident ol…
GHOSTS I: A New Faint very Isolated Dwarf Galaxy at D = 12 +/- 2 Mpc
Antonela Monachesi, Eric F. Bell, David J. Radburn-Smith +8
We report the discovery of a new faint dwarf galaxy, GHOSTS I, using HST/ACS data from one of our GHOSTS (Galaxy Halos, Outer disks, Substructure, Thick disk, and Star clusters) fi…
Galaxy Masses
S. Courteau, M. Cappellari, R. S. de Jong +8
Galaxy masses play a fundamental role in our understanding of structure formation models. This review addresses the variety and reliability of mass estimators that pertain to stars…
VLT/VIMOS Observations of an Occulting Galaxy Pair: Redshifts and Effective Extinction Curve
B. W. Holwerda, T. Boker, J. J. Dalcanton +2
We present VLT/VIMOS IFU observations of an occulting galaxy pair previously discovered in HST observations. The foreground galaxy is a low-inclination spiral disk, which causes cl…
Andromeda Optical and Infrared Disk Survey I. New Insights in Wide-Field Near-IR Surface Photometry
Jonathan Sick, Stéphane Courteau, Jean-Charles Cuillandre +3
We present wide-field near-infrared J and Ks images of the Andromeda Galaxy taken with WIRCam on the Canada-France-Hawaii Telescope (CFHT) as part of the Andromeda Optical and Infr…
Testing galaxy formation models with the GHOSTS survey: The color profile of M81's stellar halo
Antonela Monachesi, Eric F. Bell, David Radburn-Smith +6
We study the properties of the stellar populations in M81's outermost part, which hereafter we will term the stellar halo, using HST ACS/WFC observations of 19 fields from the GHOS…