output
19922026
Showing 2012 · astro-ph.COShow all

82 papers · 2 filters

astro-ph.CO2012★ 62 cited

Accounting for Baryons in Cosmological Constraints from Cosmic Shear

Andrew R. Zentner, Elisabetta Semboloni, Scott Dodelson +3

One of the most pernicious theoretical systematics facing upcoming gravitational lensing surveys is the uncertainty introduced by the effects of baryons on the power spectrum of th…

astro-ph.CO2012★ 28 cited

Can we measure the slopes of density profiles in dwarf spheroidal galaxies?

Klaudia Kowalczyk, Ewa L. Lokas, Stelios Kazantzidis +1

Using collisionless N-body simulations of dwarf galaxies orbiting the Milky Way (MW) we construct realistic models of dwarf spheroidal (dSph) galaxies of the Local Group. The dwarf…

astro-ph.CO2012★ 53 cited

Detection of Substructure in the Gravitationally Lensed Quasar MG0414+0534 using Mid-Infrared and Radio VLBI Observations

Chelsea L MacLeod, Ramsey Jones, Eric Agol +1

We present 11.2 micron observations of the gravitationally lensed, radio-loud z_s=2.64 quasar MG0414+0534, obtained using the Michelle camera on Gemini North. We find a flux ratio…

astro-ph.CO2012★ 92 cited

The clustering of galaxies in the SDSS-III Baryon Oscillation Spectroscopic Survey: Luminosity and Color Dependence and Redshift Evolution

Hong Guo, Idit Zehavi, Zheng Zheng +40

We measure the luminosity and color dependence and the redshift evolution of galaxy clustering in the Sloan Digital Sky Survey-III Baryon Oscillation Spectroscopic Survey Ninth Dat…

astro-ph.CO2012★ 601 cited

The CO-to-H2 Conversion Factor and Dust-to-Gas Ratio on Kiloparsec Scales in Nearby Galaxies

K. M. Sandstrom, A. K. Leroy, F. Walter +42

We present kiloparsec (kpc) spatial resolution maps of the CO-to-H2 conversion factor (alpha_co) and dust-to-gas ratio (DGR) in 26 nearby, star-forming galaxies. We have simultaneo…

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★ 86 cited

The BOSS Lyman-alpha Forest Sample from SDSS Data Release 9

Khee-Gan Lee, Stephen Bailey, Leslie E. Bartsch +50

We present the BOSS Lyman-alpha (Lya) Forest Sample from SDSS Data Release 9, comprising 54,468 quasar spectra with zqso > 2.15 suitable for Lya forest analysis. This data set prob…

astro-ph.CO2012★ 44 cited

The Properties of Post-Starburst Quasars Based on Optical Spectroscopy

Sabrina L. Cales, Michael S. Brotherton, Zhaohui Shang +8

We present optical spectroscopy of a sample of 38 post-starburst quasars (PSQs) at z ~ 0.3, 29 of which have morphological classifications based on Hubble Space Telescope imaging.…

astro-ph.CO2012★ 109 cited

The clustering of galaxies in the SDSS-III Baryon Oscillation Spectroscopic Survey: the low redshift sample

John K. Parejko, Tomomi Sunayama, Nikhil Padmanabhan +36

We report on the small scale (0.5<r<40h^-1 Mpc) clustering of 78895 massive (M*~10^11.3M_sun) galaxies at 0.2<z<0.4 from the first two years of data from the Baryon Oscillation Spe…

astro-ph.CO2012★ 273 cited

The Imprint of The Extragalactic Background Light in the Gamma-Ray Spectra of Blazars

LAT Collaboration

The light emitted by stars and accreting compact objects through the history of the Universe is encoded in the intensity of the extragalactic background light (EBL). Knowledge of t…

astro-ph.CO2012★ 568 cited

The Mass-Metallicity Relation with the Direct Method on Stacked Spectra of SDSS Galaxies

Brett H. Andrews, Paul Martini

The relation between galaxy stellar mass and gas-phase metallicity is a sensitive diagnostic of the main processes that drive galaxy evolution, namely cosmological gas inflow, meta…

astro-ph.CO2012★ 630 cited

Baryon Acoustic Oscillations in the Ly-α forest of BOSS quasars

Nicolás G. Busca, Timothée Delubac, James Rich +59

We report a detection of the baryon acoustic oscillation (BAO) feature in the three-dimensional correlation function of the transmitted flux fraction in the \Lya forest of high-red…

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★ 4 cited

XMM-Newton Observations of Three Interacting Luminous Infrared Galaxies

Dale Mudd, Smita Mathur, Matteo Guainazzi +8

We investigate the X-ray properties of three interacting luminous infrared galaxy systems. In one of these systems, IRAS 18329+5950, we resolve two separate sources. A second, IRAS…

astro-ph.CO2012★ 61 cited

The Redshift-Space Cluster-Galaxy Cross-Correlation Function: I. Modeling Galaxy Infall onto Millennium Simulation Clusters and SDSS Groups

Ying Zu, David H. Weinberg

The large scale infall of galaxies around massive clusters provides a potentially powerful diagnostic of structure growth, dark energy, and cosmological deviations from General Rel…

astro-ph.CO2012★ 202 cited

The SDSS-III Baryon Oscillation Spectroscopic Survey: The Quasar Luminosity Function from Data Release Nine

Nicholas P. Ross, Ian D. McGreer, Martin White +39

We present a new measurement of the optical Quasar Luminosity Function (QLF), using data from the Sloan Digital Sky Survey-III: Baryon Oscillation Spectroscopic Survey (SDSS-III: B…

astro-ph.CO2012★ 273 cited

The Sloan Digital Sky Survey quasar catalog: ninth data release

Isabelle Pâris, Patrick Petitjean, Eric Aubourg +73

We present the Data Release 9 Quasar (DR9Q) catalog from the Baryon Oscillation Spectroscopic Survey (BOSS) of the Sloan Digital Sky Survey III. The catalog includes all BOSS objec…

astro-ph.CO2012★ 14 cited

Novel Techniques for Decomposing Diffuse Backgrounds

Brandon S. Hensley, Vasiliki Pavlidou, Jennifer M. Siegal-Gaskins

The total anisotropy of a diffuse background composed of two or more sources, such as the Fermi-LAT--measured gamma-ray background, is set by the anisotropy of each source populati…

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★ 121 cited

No Stripped Hydrogen in the Nebular Spectra of Nearby Type Ia Supernova 2011fe

Benjamin J. Shappee, K. Z. Stanek, R. W. Pogge +1

A generic prediction of the single-degenerate model for Type Ia supernovae (SNe Ia) is that a significant amount of material will be stripped from the donor star (~0.5 Msun for a g…

astro-ph.CO2012★ 196 cited

The Structure of the Broad Line Region in AGN: I. Reconstructed Velocity-Delay Maps

C. J. Grier, B. M. Peterson, Keith Horne +38

We present velocity-resolved reverberation results for five active galactic nuclei. We recovered velocity-delay maps using the maximum-entropy method for four objects: Mrk 335, Mrk…

astro-ph.CO2012★ 150 cited

Not Dead Yet: Cool Circumgalactic Gas in the Halos of Early Type Galaxies

Christopher Thom, Jason Tumlinson, Jessica K. Werk +10

We report new observations of circumgalactic gas in the halos of early type galaxies obtained by the COS-Halos Survey with the Cosmic Origins Spectrograph onboard the Hubble Space…

astro-ph.CO2012

Synergistic Astrophysics in the Ultraviolet using Active Galactic Nuclei

Gerard Kriss, Nahum Arav, Anton Koekemoer +3

Observing programs comprising multiple scientific objectives will enhance the productivity of NASA's next UV/Visible mission. Studying active galactic nuclei (AGN) is intrinsically…

astro-ph.CO2012★ 29 cited

Discovery of an active supermassive black hole in the bulge-less galaxy NGC 4561

C. Araya Salvo, S. Mathur, H. Ghosh +2

We present XMM-Newton observations of the Chandra-detected nuclear X-ray source in NGC 4561. The hard X-ray spectrum can be described by a model composed of an absorbed power-law w…