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High Redshift Supernova Rates
Tomas Dahlen, Louis-Gregory Strolger, Adam G. Riess +10
We use a sample of 42 supernovae detected with the Advanced Camera for Surveys on-board the Hubble Space Telescope as part of the Great Observatories Origins Deep Survey to measure…
The Colors of Dwarf Elliptical Galaxy Globular Cluster Systems, Nuclei and Stellar Halos
Jennifer M. Lotz, Bryan W. Miller, Henry C. Ferguson
We present the results of a Hubble Space Telescope WFPC2 F555W and F814W survey of 69 dwarf elliptical galaxies (dEs) in the Virgo and Fornax Clusters and Leo Group. The colo…
GRAPES, Grism Spectroscopy of the Hubble Ultra Deep Field: Description and Data Reduction
N. Pirzkal, C. Xu, S. Malhotra +19
We present deep unbiased spectroscopy of the Hubble Ultra Deep Field (UDF) carried out using the slitless grism spectroscopy mode of the Advance Camera for Surveys on the Hubble Sp…
RR Lyrae Stars in the Andromeda Halo from Deep Imaging with the Advanced Camera for Surveys
Thomas M. Brown, Henry C. Ferguson, Ed Smith +4
We present a complete census of RR Lyrae stars in a halo field of the Andromeda galaxy. These deep observations, taken as part of a program to measure the star formation history in…
Evolution of Disk Galaxies in the GOODS-South Field: Number Densities and Size Distribution
S. Ravindranath, H. C. Ferguson, C. Conselice +14
We examine the evolution of the sizes and number densities of disk galaxies using the high resolution images obtained by the Great Observatories Origins Deep Survey (GOODS) with th…