Showing 2012 · astro-ph.COShow all

115 papers · 2 filters

astro-ph.CO2012★ 198 cited

CLASH: The enhanced lensing efficiency of the highly elongated merging cluster MACS J0416.1-2403

A. Zitrin, M. Meneghetti, K. Umetsu +21

We perform a strong-lensing analysis of the merging galaxy cluster MACS J0416.1-2403 (M0416; z=0.42) in recent CLASH/HST observations. We identify 70 new multiple images and candid…

astro-ph.CO2012★ 63 cited

Inferring the mass of sub-millimetre galaxies by exploiting their gravitational magnification of background galaxies

H. Hildebrandt, L. van Waerbeke, D. Scott +25

Dust emission at sub-millimetre wavelengths allows us to trace the early phases of star formation in the Universe. In order to understand the physical processes involved in this mo…

astro-ph.CO2012★ 280 cited

Constraints on Cosmology from the Cosmic Microwave Background Power Spectrum of the 2500 SPT-SZ Survey

Z. Hou, C. L. Reichardt, K. T. Story +49

We explore extensions to the CDM cosmology using measurements of the cosmic microwave background (CMB) from the recent SPT-SZ survey, along with data from WMAP7 and measurements…

astro-ph.CO2012★ 53 cited

Systematic effects in large-scale angular power spectra of photometric quasars and implications for constraining primordial nongaussianity

Anthony R. Pullen, Christopher M. Hirata

Primordial non-Gaussianity of local type is predicted to lead to enhanced halo clustering on very large scales. Photometric quasars, which can be seen from cosmological redshifts z…

astro-ph.CO2012★ 14 cited

The Clustering of Extremely Red Objects

David P. Palamara, Michael J. I. Brown, Buell T. Jannuzi +10

We measure the clustering of Extremely Red Objects (EROs) in ~8 deg^2 of the NOAO Deep Wide Field Survey Boötes field in order to establish robust links between ERO z~1.2 and local…

astro-ph.CO2012★ 32 cited

The complex physics of dusty star-forming galaxies at high redshifts as revealed by Herschel and Spitzer

B. Lo Faro, A. Franceschini, M. Vaccari +29

We combine far-infrared photometry from Herschel (PEP/HERMES) with deep mid-infrared spectroscopy from Spitzer to investigate the nature and the mass assembly history of a sample o…

astro-ph.CO2012★ 48 cited

On the shear estimation bias induced by the spatial variation of colour across galaxy profiles

Elisabetta Semboloni, Henk Hoekstra, Zhuoyi Huang +13

The spatial variation of the colour of a galaxy may introduce a bias in the measurement of its shape if the PSF profile depends on wavelength. We study how this bias depends on the…

astro-ph.CO2012★ 96 cited

HerMES: Unveiling obscured star formation - the far infrared luminosity function of ultraviolet-selected galaxies at z~1.5

S. Heinis, V. Buat, M. Béthermin +22

We study the far-infrared (IR) and sub-millimeter properties of a sample of ultraviolet (UV) selected galaxies at z\sim1.5. Using stacking at 250, 350 and 500 um from Herschel Spac…

astro-ph.CO2012★ 372 cited

CLASH: Three Strongly Lensed Images of a Candidate z ~ 11 Galaxy

Dan Coe, Adi Zitrin, Mauricio Carrasco +20

We present a candidate for the most distant galaxy known to date with a photometric redshift z = 10.7 +0.6 / -0.4 (95% confidence limits; with z < 9.5 galaxies of known types ruled…

astro-ph.CO2012★ 31 cited

Testing standard and non-standard neutrino physics with cosmological data

Elena Giusarma, Roland de Putter, Olga Mena

Cosmological constraints on the sum of neutrino masses and on the effective number of neutrino species in standard and non-standard scenarios are computed using the most recent ava…

astro-ph.CO2012★ 41 cited

The Faint End of the Cluster Galaxy Luminosity Function at High Redshift

Conor Mancone, Troy Baker, Anthony H. Gonzalez +7

We measure the faint end slope of the galaxy luminosity function (LF) for cluster galaxies at 1<z<1.5 using Spitzer IRAC data. We investigate whether this slope, alpha, differs fro…

astro-ph.CO2012★ 92 cited

The Weight of Emptiness: The Gravitational Lensing Signal of Stacked Voids

Elisabeth Krause, Tzu-Ching Chang, Olivier Doré +1

The upcoming new generation of spectroscopic galaxy redshift surveys will provide large samples of cosmic voids, the distinct, large underdense structures in the universe. Combinin…

astro-ph.CO2012★ 192 cited

A Census of Star-Forming Galaxies in the z~9-10 Universe based on HST+Spitzer Observations Over 19 CLASH clusters: Three Candidate z~9-10 Galaxies and Improved Constraints on the Star Formation Rate Density at z~9

R. Bouwens, L. Bradley, A. Zitrin +34

We utilise a two-color Lyman-Break selection criterion to search for z~9-10 galaxies over the first 19 clusters in the CLASH program. A systematic search yields three z~9-10 candid…

astro-ph.CO2012★ 114 cited

Sunyaev-Zel'dovich-Measured Pressure Profiles from the Bolocam X-ray/SZ Galaxy Cluster Sample

Jack Sayers, Nicole G. Czakon, Adam Mantz +14

We describe Sunyaev-Zel'dovich (SZ) effect measurements and analysis of the intracluster medium (ICM) pressure profiles of a set of 45 massive galaxy clusters imaged using Bolocam…

astro-ph.CO2012★ 82 cited

Cross-correlations as a cosmological carbon monoxide detector

Anthony Pullen, Tzu-Ching Chang, Olivier Dore +1

We present a new procedure to measure the large-scale carbon monoxide (CO) emissions across cosmic history. As a tracer of large-scale structure (LSS), the CO gas content as a func…

astro-ph.CO2012★ 20 cited

Flexion measurement in simulations of Hubble Space Telescope data

Barnaby Rowe, David Bacon, Richard Massey +5

We present a simulation analysis of weak gravitational lensing flexion and shear measurement using shapelet decomposition, and identify differences between flexion and shear measur…

astro-ph.CO2012★ 447 cited

Bayesian Galaxy Shape Measurement for Weak Lensing Surveys - III. Application to the Canada-France-Hawaii Telescope Lensing Survey

L. Miller, C. Heymans, T. D. Kitching +17

A likelihood-based method for measuring weak gravitational lensing shear in deep galaxy surveys is described and applied to the Canada-France-Hawaii Telescope (CFHT) Lensing Survey…

astro-ph.CO2012★ 203 cited

Origins of weak lensing systematics, and requirements on future instrumentation (or knowledge of instrumentation)

Richard Massey, Henk Hoekstra, Thomas Kitching +11

The first half of this paper explores the origin of systematic biases in the measurement of weak gravitational lensing. Compared to previous work, we expand the investigation of PS…

astro-ph.CO2012★ 101 cited

Radio Continuum Surveys with Square Kilometre Array Pathfinders

Ray P. Norris, J. Afonso, D. Bacon +48

In the lead-up to the Square Kilometre Array (SKA) project, several next-generation radio telescopes and upgrades are already being built around the world. These include APERTIF (T…

astro-ph.CO2012★ 314 cited

Extending the Nearby Galaxy Heritage with WISE: First Results from the WISE Enhanced Resolution Galaxy Atlas

T. H. Jarrett, F. Masci, C. W. Tsai +15

The Wide-field Infrared Survey Explorer (WISE) mapped the entire sky at mid-infrared wavelengths 3.4, 4.6, 12 and 22 microns. The mission was primarily designed to extract point so…

astro-ph.CO2012★ 63 cited

A Population of z>2 Far-Infrared Herschel-SPIRE selected Starbursts

C. M. Casey, S. Berta, M. Béthermin +29

We present spectroscopic observations for a sample of 36 Herschel-SPIRE 250-500um selected galaxies (HSGs) at 2<z<5 from the Herschel Multi-tiered Extragalactic Survey (HerMES). Re…

astro-ph.CO2012★ 170 cited

A Redshift Survey of Herschel Far-Infrared Selected Starbursts and Implications for Obscured Star Formation

C. M. Casey, S. Berta, M. Béthermin +30

We present Keck spectroscopic observations and redshifts for a sample of 767 Herschel-SPIRE selected galaxies (HSGs) at 250, 350, and 500um, taken with the Keck I Low Resolution Im…

astro-ph.CO2012★ 19 cited

The Herschel view of the environment of the radio galaxy 4C+41.17 at z = 3.8

D. Wylezalek, J. Vernet, C. De Breuck +16

We present Herschel observations at 70, 160, 250, 350 and 500 micron of the environment of the radio galaxy 4C+41.17 at z = 3.792. About 65% of the extracted sources are securely i…

astro-ph.CO2012★ 61 cited

Protostellar Feedback and Final Mass of the Second-Generation Primordial Stars

Takashi Hosokawa, Naoki Yoshida, Kazuyuki Omukai +1

The first stars in the universe ionized the ambient primordial gas through various feedback processes. "Second-generation" primordial stars potentially form from this disturbed gas…