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The Deep2 Galaxy Redshift Survey: Evolution of Close Galaxy Pairs and Major-Merger Rates Up to z ~ 1.2
Lihwai Lin, David C. Koo, Christopher N. A. Willmer +10
We derive the close, kinematic pair fraction and merger rate up to z ~ 1.2 from the initial data of the DEEP2 Redshift Survey. Assuming a mild luminosity evolution, the number of c…
The DEEP2 Galaxy Redshift Survey: First results on galaxy groups
Brian F. Gerke, Jeffrey A. Newman, Marc Davis +13
We use the first 25% of the DEEP2 Galaxy Redshift Survey spectroscopic data to identify groups and clusters of galaxies in redshift space. The data set contains 8370 galaxies with…
Detection of the Main Sequence Turn-off of a Newly Discovered Milky Way Halo Structure in the Triangulum-Andromeda Region
Steven R. Majewski, James C. Ostheimer, Helio J. Rocha-Pinto +3
An upper main sequence (MS) and main-sequence turn-off (MSTO) feature appears in the color-magnitude diagram (CMD) of a large area photometric survey of the southern half of M31 st…
Dynamics and Stellar Content of the Giant Southern Stream in M31. I. Keck Spectroscopy of Red Giant Stars
Puragra Guhathakurta, R. Michael Rich, David B. Reitzel +7
We present results from a large spectroscopic survey of M31 red giants using the Keck telescope/DEIMOS. Photometric pre-screening, based on the 100A-wide DDO51 band centered on the…
Dynamics and Stellar Content of the Giant Southern Stream in M31. II. Interpretation
Andreea S. Font, Kathryn V. Johnston, Puragra Guhathakurta +2
We examine the nature of the progenitor of the giant stellar stream in M31 using as constraints new radial velocity measurements of stream red giant stars (presented in the compani…
Measuring the Slope of the Dust Extinction Law and the Power Spectrum of Dust Clouds Using Differentially-Reddened Globular Clusters
J. Melbourne, P. Guhathakurta
We present 3 methods for measuring the Galactic dust extinction law slope R_V and a method for quantifying fine structure in dust clouds in the direction of differentially-reddened…