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Supernovae in Low-Redshift Galaxy Clusters: the Type-Ia Supernova Rate
Keren Sharon, Avishay Gal-Yam, Dan Maoz +3
Supernova (SN) rates are a potentially powerful diagnostic of star formation history (SFH), metal enrichment, and SN physics, particularly in galaxy clusters with their deep, metal…
Investigating the Andromeda Stream: III. A Young Shell System in M31
M. A. Fardal, P. Guhathakurta, A. Babul +1
Published maps of red giant stars in the halo region of M31 exhibit a giant stellar stream to the south of this galaxy, as well as a giant "shelf" to the northeast of M31's center.…
AEGIS: Galaxy Spectral Energy Distributions from the X-Ray to Radio
N. P. Konidaris, P. Guhathakurta, K. Bundy +15
The All-wavelength Extended Groth Strip International Survey (AEGIS) team presents broad-band spectral energy distributions (SEDs), from X-ray to radio wavelengths, for 71 galaxies…
The DEEP2 galaxy redshift survey: the evolution of the blue fraction in groups and the field
Brian F. Gerke, Jeffrey A. Newman, S. M. Faber +9
We explore the behavior of the blue galaxy fraction over the redshift range 0.75 <= z <= 1.3 in the DEEP2 Survey, both for field galaxies and for galaxies in groups. The primary ai…
The DEEP2 Galaxy Redshift Survey: AEGIS Observations of a Dual AGN at z=0.7
Brian F. Gerke, Jeffrey A. Newman, Jennifer Lotz +15
We present evidence for a dual Active Galactic Nucleus (AGN) within an early-type galaxy at z=0.709 in the Extended Groth Strip. The galaxy lies on the red sequence, with absolute…
Exploring Halo Substructure with Giant Stars X. Extended Dark Matter or Tidal Disruption?: The Case for the Leo I Dwarf Spheroidal Galaxy
Sangmo Tony Sohn, S. R. Majewski, R. R. Muñoz +7
We present a wide-field (4.5 deg^2) photometric and spectroscopic survey of the Leo I dwarf spheroidal (dSph) galaxy to explore its extended morphology and dynamics. As in previous…