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Inspiralling Supermassive Black Holes: A New Signpost for Galaxy Mergers
Julia M. Comerford, Brian F. Gerke, Jeffrey A. Newman +8
We present a new technique for observationally identifying galaxy mergers spectroscopically rather than through host galaxy imaging. Our technique exploits the dynamics of supermas…
Constraints on the star formation histories of galaxies from z~1 to z~0
Yan-Mei Chen, Vivienne Wild, Guinevere Kauffmann +5
We present a new method to estimate the average star formation rate per unit stellar mass (SSFR) of a stacked population of galaxies. We combine the spectra of 600-1000 galaxies wi…
The DEEP2 Galaxy Redshift Survey: Environments of Poststarburst Galaxies at z~0.1 and z~0.8
Renbin Yan, Jeffrey A. Newman, S. M. Faber +6
Postststarburst (K+A) galaxies are candidates for galaxies in transition from a star-forming phase to a passively-evolving phase. We have spectroscopically identified large samples…
The DEEP2 Galaxy Redshift Survey: The Red Sequence AGN Fraction and its Environment and Redshift Dependence
Antonio D. Montero-Dorta, Darren J. Croton, Renbin Yan +7
We measure the dependence of the AGN fraction on local environment at z~1, using spectroscopic data taken from the DEEP2 Galaxy Redshift Survey, and Chandra X-ray data from the All…
The DEEP2 Galaxy Redshift Survey: Color and Luminosity Dependence of Galaxy Clustering at z~1
Alison L. Coil, Jeffrey A. Newman, Darren Croton +8
We present measurements of the color and luminosity dependence of galaxy clustering at z~1 in the DEEP2 Galaxy Redshift Survey. Using volume-limited subsamples in bins of both colo…
The DEEP2 Galaxy Redshift Survey: The Role of Galaxy Environment in the Cosmic Star-Formation History
Michael C. Cooper, Jeffrey A. Newman, Benjamin J. Weiner +11
Using galaxy samples drawn from the Sloan Digital Sky Survey and the DEEP2 Galaxy Redshift Survey, we study the relationship between star formation and environment at z ~ 0.1 and z…
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…
Evolution in the Halo Masses of Isolated Galaxies between z~1 and z~0: From DEEP2 to SDSS
Charlie Conroy, Francisco Prada, Jeffrey A. Newman +11
We measure the evolution in the virial mass-to-light ratio (M_{200}/L_B) and virial-to-stellar mass ratio (M_{200}/M_\ast) for isolated ~ L* galaxies between z~1 and z~0 by combini…
The DEEP2 Galaxy Redshift Survey: Evolution of the Color-Density Relation at 0.4 < z < 1.35
Michael C. Cooper, Jeffrey A. Newman, Alison L. Coil +8
Using a sample of 19,464 galaxies drawn from the DEEP2 Galaxy Redshift Survey, we study the relationship between galaxy color and environment at 0.4 < z < 1.35. We find that the fr…
The DEEP2 Galaxy Redshift Survey: The Relationship Between Galaxy Properties and Environment at z ~ 1
Michael C. Cooper, Jeffrey A. Newman, Darren J. Croton +10
We study the mean environment of galaxies in the DEEP2 Galaxy Redshift Survey as a function of rest-frame color, luminosity, and [OII] equivalent width. The local galaxy overdensit…
The DEEP2 Galaxy Redshift Survey: Mean Ages and Metallicities of Red Field Galaxies at z ~ 0.9 from Stacked Keck/DEIMOS Spectra
Ricardo P. Schiavon, S. M. Faber, Nicholas Konidaris +10
As part of the DEEP2 galaxy redshift survey, we analyze absorption line strengths in stacked Keck/DEIMOS spectra of red field galaxies with weak to no emission lines, at redshifts…
On the Origin of [OII] Emission in Red Sequence and Post-starburst Galaxies
Renbin Yan, Jeffrey A. Newman, S. M. Faber +3
We investigate the emission-line properties of galaxies with red rest-frame colors using spectra from SDSS DR4. Emission lines are detected in more than half of the red galaxies. W…
The DEEP2 Galaxy Redshift Survey: The Evolution of Void Statistics from z~1 to z~0
Charlie Conroy, Alison L. Coil, Martin White +6
We present measurements of the void probability function (VPF) at z~1 using data from the DEEP2 Redshift Survey and its evolution to z~0 using data from the Sloan Digital Sky Surve…
The DEEP2 Galaxy Redshift Survey: Clustering of Groups and Group Galaxies at z~1
Alison L. Coil, Brian F. Gerke, Jeffrey A. Newman +7
We study the clustering properties of groups and of galaxies in groups in the DEEP2 Galaxy Redshift Survey dataset at z~1. Four clustering measures are presented: 1) the group corr…
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…
The DEEP2 Galaxy Redshift Survey: Probing the Evolution of Dark Matter Halos around Isolated Galaxies at z ~ 1
Charlie Conroy, Jeffrey A. Newman, Marc Davis +6
Using the first 25% of DEEP2 Redshift Survey data, we probe the line-of-sight velocity dispersion profile for isolated galaxies with absolute B-band magnitude -22<M_B-5log(h)<-21 a…
Constraining Dark Energy with DEEP2
Marc Davis, Brian F. Gerke, Jeffrey A. Newman
The DEEP2 survey has now completed half of its planned three-year lifespan, and we have collected approximately 50% of the data, putting us exactly on schedule. The survey plan cal…
Evolution and Color-Dependence of the Galaxy Angular Correlation Function: 350,000 Galaxies in 5 Square Degrees
Alison L. Coil, Jeffrey A. Newman, Nick Kaiser +4
When applied to deep photometric catalogs, the two-point angular correlation function, w(theta), is a sensitive probe of the evolution of galaxy clustering properties. Here we pres…
The DEEP2 Galaxy Redshift Survey: Spectral classification of galaxies at z~1
Darren S. Madgwick, Alison L. Coil, Christopher J. Conselice +15
We present a Principal Component Analysis (PCA)-based spectral classification, eta, for the first 5600 galaxies observed in the DEEP2 Redshift Survey. This parameter provides a ver…
The DEEP2 Galaxy Redshift Survey: Clustering of Galaxies in Early Data
Alison L. Coil, Marc Davis, Darren S. Madgwick +14
We measure the two-point correlation function xi(r) using a sample of 2219 galaxies in an area of 0.32 degrees^2 at z=0.7-1.35 from the first season of the DEEP2 Galaxy Redshift Su…
An estimate of Ω_m without priors
Hume A. Feldman, Roman Juszkiewicz, Pedro Ferreira +10
Using mean relative peculiar velocity measurements for pairs of galaxies, we estimate the cosmological density parameter and the amplitude of density fluctuations . Our…
Science Objectives and Early Results of the DEEP2 Redshift Survey
Marc Davis, Sandra M. Faber, Jeffrey A. Newman +18
The DEIMOS spectrograph has now been installed on the Keck-II telescope and commissioning is nearly complete. The DEEP2 Redshift Survey, which will take approximately 120 nights at…