Showing 2012 · astro-ph.COShow all

47 papers · 2 filters

astro-ph.CO2012★ 139 cited

How Gravitational-wave Observations Can Shape the Gamma-ray Burst Paradigm

Imre Bartos, Patrick Brady, Szabolcs Marka

By reaching through shrouding blastwaves, efficiently discovering off-axis events, and probing the central engine at work, gravitational wave (GW) observations will soon revolution…

astro-ph.CO2012★ 5.1k cited

Nine-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Parameter Results

G. Hinshaw, D. Larson, E. Komatsu +18

We present cosmological parameter constraints based on the final nine-year WMAP data, in conjunction with additional cosmological data sets. The WMAP data alone, and in combination…

astro-ph.CO2012★ 2.4k cited

Nine-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Final Maps and Results

C. L. Bennett, D. Larson, J. L. Weiland +18

We present the final nine-year maps and basic results from the WMAP mission. We provide new nine-year full sky temperature maps that were processed to reduce the asymmetry of the e…

astro-ph.CO2012★ 99 cited

Variability in Quasar Broad Absorption Line Outflows III. What Happens on the Shortest Time-scales?

Daniel M. Capellupo, Fred Hamann, Joseph C. Shields +2

Broad absorption lines (BALs) in quasar spectra are prominent signatures of high-velocity outflows, which might be present in all quasars and could be a major contributor to feedba…

astro-ph.CO2012★ 57 cited

Baryon impact on weak lensing peaks and power spectrum: low-bias statistics and self-calibration in future surveys

Xiuyuan Yang, Jan M. Kratochvil, Kevin Huffenberger +2

Peaks in two-dimensional weak lensing (WL) maps contain significant cosmological information, complementary to the WL power spectrum. This has recently been demonstrated using N-bo…

astro-ph.CO2012★ 41 cited

Chandra View of the Warm-Hot IGM toward 1ES 1553+113: Absorption Line Detections and Identifications (Paper I)

F. Nicastro, M. Elvis, Y. Krongold +14

We present the first results from our pilot 500 ks Chandra-LETG Large Program observation of the soft X-ray brightest source in the z>=0.4 sky, the blazar 1ES 1553+113, aimed to se…

astro-ph.CO2012★ 196 cited

The Space Motion of Leo I: The Mass of the Milky Way's Dark Matter Halo

Michael Boylan-Kolchin, James S. Bullock, Sangmo Tony Sohn +2

We combine our Hubble Space Telescope measurement of the proper motion of the Leo I dwarf spheroidal galaxy (presented in a companion paper) with the highest resolution numerical s…

astro-ph.CO2012★ 11 cited

The WARPS Survey. VIII. Evolution of the Galaxy Cluster X-ray Luminosity Function

L. A. Koens, B. J. Maughan, L. R. Jones +5

We present measurements of the galaxy cluster X-ray Luminosity Function (XLF) from the Wide Angle ROSAT Pointed Survey (WARPS) and quantify its evolution. WARPS is a serendipitous…

astro-ph.CO2012★ 70 cited

CMB Power Asymmetry from Non-Gaussian Modulation

Fabian Schmidt, Lam Hui

Non-Gaussianity in the inflationary perturbations can couple observable scales to modes of much longer wavelength (even superhorizon), leaving as a signature a large-angle modulati…

astro-ph.CO2012★ 84 cited

Spectral Energy Distributions of Type 1 AGN in the COSMOS Survey I - The XMM-COSMOS Sample

M. Elvis, H. Hao, F. Civano +39

The "Cosmic Evolution Survey" (COSMOS) enables the study of the Spectral Energy Distributions (SEDs) of Active Galactic Nuclei (AGN) because of the deep coverage and rich sampling…

astro-ph.CO2012★ 255 cited

The impact of interactions, bars, bulges, and AGN on star formation efficiency in local massive galaxies

A. Saintonge, L. J. Tacconi, S. Fabello +10

Using observations from the GASS and COLD GASS surveys and complementary data from SDSS and GALEX, we investigate the nature of variations in gas depletion time observed across the…

astro-ph.CO2012★ 150 cited

No-Go Theorems for Generalized Chameleon Field Theories

Junpu Wang, Lam Hui, Justin Khoury

The chameleon, or generalizations thereof, is a light scalar that couple to matter with gravitational strength, but whose manifestation depends on the ambient matter density. A key…

astro-ph.CO2012★ 40 cited

Gas reservoirs and star formation in a forming galaxy cluster at z=0.2

Yara L. Jaffé, Bianca M. Poggianti, M. A. W. Verheijen +2

We present first results from the Blind Ultra Deep HI Environmental Survey (BUDHIES) of the Westerbork Synthesis Radio Telescope (WSRT). Our survey is the first direct imaging stud…

astro-ph.CO2012★ 2.1k cited

The Baryon Oscillation Spectroscopic Survey of SDSS-III

Kyle S. Dawson, David J. Schlegel, Christopher P. Ahn +162

The Baryon Oscillation Spectroscopic Survey (BOSS) is designed to measure the scale of baryon acoustic oscillations (BAO) in the clustering of matter over a larger volume than the…

astro-ph.CO2012★ 176 cited

The Birth of a Galaxy. II. The Role of Radiation Pressure

John H. Wise, Tom Abel, Matthew J. Turk +2

Massive stars provide feedback that shapes the interstellar medium of galaxies at all redshifts and their resulting stellar populations. Here we present three adaptive mesh refinem…

astro-ph.CO2012★ 1.4k cited

Dark Matter Results from 225 Live Days of XENON100 Data

XENON100 Collaboration, E. Aprile, M. Alfonsi +75

We report on a search for particle dark matter with the XENON100 experiment, operated at the Laboratori Nazionali del Gran Sasso (LNGS) for 13 months during 2011 and 2012. XENON100…

astro-ph.CO2012★ 98 cited

Second Season QUIET Observations: Measurements of the CMB Polarization Power Spectrum at 95 GHz

QUIET Collaboration, D. Araujo, C. Bischoff +48

The Q/U Imaging ExperimenT (QUIET) has observed the cosmic microwave background (CMB) at 43 and 95GHz. The 43-GHz results have been published in QUIET Collaboration et al. (2011),…

astro-ph.CO2012★ 47 cited

Exploring the Connection Between Star Formation and AGN Activity in the Local Universe

Stephanie M. LaMassa, T. M. Heckman, A. Ptak +3

We study a combined sample of 264 star-forming, 51 composite, and 73 active galaxies using optical spectra from SDSS and mid-infrared (mid-IR) spectra from the Spitzer Infrared Spe…

astro-ph.CO2012★ 55 cited

Further evidence for large central mass-to-light ratios in early-type galaxies: the case of ellipticals and lenticulars in the Abell~262 cluster

G. A. Wegner, E. M. Corsini, J. Thomas +3

We present radially resolved spectroscopy of 8 early-type galaxies in Abell~262, measuring rotation, velocity dispersion, and coefficients along three axes, and line-st…

astro-ph.CO2012★ 99 cited

The GALEX Arecibo SDSS Survey. VI. Second Data Release and Updated Gas Fraction Scaling Relations

Barbara Catinella, David Schiminovich, Guinevere Kauffmann +7

We present the second data release from the GALEX Arecibo SDSS Survey (GASS), an ongoing large Arecibo program to measure the HI properties for an unbiased sample of ~1000 galaxies…

astro-ph.CO2012★ 33 cited

Feedback from the IR Background in the Early Universe

Jemma Wolcott-Green, Zoltán Haiman

It is commonly believed that the earliest stages of star-formation in the Universe were self-regulated by global radiation backgrounds - either by the ultraviolet Lyman-Werner (LW)…

astro-ph.CO2012★ 12 cited

A Precision Photometric Comparison between SDSS-II and CSP Type Ia Supernova Data

J. Mosher, M. Sako, L. Corlies +10

Consistency between Carnegie Supernova Project (CSP) and SDSS-II supernova (SN) survey ugri measurements has been evaluated by comparing SDSS and CSP photometry for nine spectrosco…

astro-ph.CO2012★ 45 cited

The Zurich Environmental Study of Galaxies in Groups along the Cosmic Web. III. Galaxy Photometric Measurements and the Spatially-Resolved Color Properties of Early- and Late-Type Satellites in Diverse Environments

A. Cibinel, C. M. Carollo, S. J. Lilly +10

We present photometric measurements for the galaxies - and when possible their bulges and disks - in the 0.05<z<0.0585 groups of the Zurich Environmental Study (ZENS); these measur…

astro-ph.CO2012★ 37 cited

The Zurich Environmental Study (ZENS) of Galaxies in Groups along the Cosmic Web. II. Galaxy Structural Measurements and the Concentration of Morphologically Classified Satellites in Diverse Environments

A. Cibinel, C. M. Carollo, S. J. Lilly +9

We present structural measurements for the galaxies in the 0.05<z<0.0585 groups of the Zurich Environmental Study, aimed at establishing how galaxy properties depend on four enviro…