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An Optical Observational Cluster Mass Function at with the ORELSE Survey
D. Hung, B. C. Lemaux, R. R. Gal +11
We present a new mass function of galaxy clusters and groups using optical/near-infrared wavelength spectroscopic and photometric data from the Observations of Redshift Evolution i…
On the intermediate-redshift central stellar mass-halo mass relation, and implications for the evolution of the most massive galaxies since z~1
Francesco Shankar, Hong Guo, Vincent Bouillot +20
The stellar mass-halo mass relation is a key constraint in all semi-analytic, numerical, and semi-empirical models of galaxy formation and evolution. However, its exact shape and r…
Hidden Starbursts and Active Galactic Nuclei at 0<z<4 from the Herschel-VVDS-CFHTLS-D1 Field: Inferences on Coevolution and Feedback
Brian C. Lemaux, Emeric Le Floc'h, Olivier Le Fèvre +12
We investigate of the properties of 2000 Herschel/SPIRE-selected galaxies from using a combination of extensive spectroscopy, deep imaging from CFHT, VLA, Spitzer, XM…
Star Formation Quenching in High-redshift Large-scale Structure: Post-starburst Galaxies in the Cl1604 Supercluster at
Po-Feng Wu, Roy R. Gal, Brian C. Lemaux +4
The Cl1604 supercluster at is one of the most extensively studied high redshift large scale structures, with more than 500 spectroscopically confirmed members. It cons…
The Violent Youth of Bright and Massive Cluster Galaxies and their Maturation over 7 Billion Years
Begoña Ascaso, Brian C. Lemaux, Lori M. Lubin +4
In this study we investigate the formation and evolution mechanisms of the brightest cluster galaxies (BCGs) over cosmic time. At high redshift (), we selected BCGs and m…
The Spitzer Extragalactic Representative Volume Survey (SERVS): survey definition and goals
J. -C. Mauduit, M. Lacy, D. Farrah +81
We present the Spitzer Extragalactic Representative Volume Survey (SERVS), an 18 square degrees medium-deep survey at 3.6 and 4.5 microns with the post-cryogenic Spitzer Space Tele…
Submillimetre Source Counts in the Fields of High-Redshift Galaxy Clusters
A. G. Noble, T. M. A. Webb, E. Ellingson +11
We present a submillimetre survey of seven high-z galaxy clusters (0.64<z<1.0) using the Submillimetre Common-User Bolometer Array (SCUBA) at 850 and 450 um. The targets, of simila…
The Voronoi Tessellation cluster finder in 2+1 dimensions
Marcelle Soares-Santos, Reinaldo R. de Carvalho, James Annis +6
We present a detailed description of the Voronoi Tessellation (VT) cluster finder algorithm in 2+1 dimensions, which improves on past implementations of this technique. The need fo…
Decision Tree Classifiers for Star/Galaxy Separation
E. C. Vasconcellos, R. R. de Carvalho, R. R. Gal +5
We study the star/galaxy classification efficiency of 13 different decision tree algorithms applied to photometric objects in the Sloan Digital Sky Survey Data Release Seven (SDSS…
The Origin of [OII] Emission in Recently Quenched AGN Hosts
Dale D. Kocevski, Brian C. Lemaux, Lori M. Lubin +3
We have employed emission-line diagnostics derived from DEIMOS and NIRSPEC spectroscopy to determine the origin of the [OII] emission line observed in six AGN hosts at z~0.9. These…
Obscured Starburst Activity in High Redshift Clusters and Groups
Dale D. Kocevski, Brian C. Lemaux, Lori M. Lubin +6
Using Spitzer-MIPS 24um imaging and Keck spectroscopy we examine the nature of the obscured star forming population in three clusters and three groups at z~0.9. These six systems a…
SPIDER - IV. Optical and NIR color gradients in Early-type galaxies: New Insights into Correlations with Galaxy Properties
F. La Barbera, R. R. de Carvalho, I. G. de la Rosa +3
We present an analysis of stellar population gradients in 4,546 Early-Type Galaxies with photometry in along with optical spectroscopy. A new approach is described which…
The Origin of [OII] in Post-Starburst and Red-Sequence Galaxies in High-Redshift Clusters
Brian C. Lemaux, Lori M. Lubin, Alice E. Shapley +3
We present the first results from a near-IR spectroscopic campaign of the Cl1604 supercluster at z~0.9 and the cluster RX J1821.6+6827 at z~0.82 to investigate the nature of [OII]…
No Evidence of Quasar-Mode Feedback in a Four-Way Group Merger at z~0.84
Dale D. Kocevski, Lori M. Lubin, Brian C. Lemaux +3
We report on the results of a Chandra search for evidence of triggered nuclear activity within the Cl0023+0423 four-way group merger at z ~ 0.84. The system consists of four intera…
On The Nature of Fossil Galaxy Groups
F. La Barbera, R. R. de Carvalho, I. G. de la Rosa +3
We present a new sample of 25 fossil groups (FGs) at z < 0.1, along with a control sample of seventeen bright ellipticals located in non-fossil systems. Both the global properties…