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We study the infrared (IR) properties of high-redshift galaxies using deep Spitzer 24, 70, and 160 micron data. Our primary interest is to improve the constraints on the total IR luminosities, L(IR), of these galaxies. We combine the…

We want to study the mid-infrared properties and the starburst and AGN contributions, of 24um sources at z~2, through analysis of mid-infrared spectra combined with millimeter, radio, and infrared photometry. Mid-infrared spectroscopy…

(abridged) We present deep Spitzer mid-infrared spectroscopy, along with 16, 24, 70, and 850um photometry, for 22 galaxies located in GOODS-N. The sample spans a redshift range of 0.6 < z < 2.6, 24um flux densities between ~0.2-1.2 mJy, and…

We present optical spectroscopic follow-up of a sample of Distant Red Galaxies (DRGs) with K < 22.5 (Vega), selected by J-K > 2.3, in the Hubble Deep Field South, the MS 1054-03 field, and the Chandra Deep Field South. Spectroscopic…

Cosmology and Nongalactic Astrophysics · Physics 2014-11-20 Stijn Wuyts , Pieter G. van Dokkum , Marijn Franx , Natascha M. Forster Schreiber , Garth D. Illingworth , Ivo Labbe , Gregory Rudnick

We report the results of a low frequency radio variability and slow transient search using archival observations from the Very Long Array. We selected six 325 MHz radio observations from the spring of 2006, each centered on the…

High Energy Astrophysical Phenomena · Physics 2015-06-04 T. R. Jaeger , S. D. Hyman , N. E. Kassim , T. J. W. Lazio

We present a preliminary survey of 58 radio sources within the isoplanatic patches (r < 25") of bright (11<R<12) stars suitable for use as natural guide stars with high-order adaptive optics (AO). An optical and near-infrared imaging survey…

Cosmology and Nongalactic Astrophysics · Physics 2014-11-20 B. Stalder , K. C. Chambers , William D. Vacca

We introduce a new Bayesian HI spectral line fitting technique capable of obtaining spectroscopic redshifts for millions of galaxies in radio surveys with the Square Kilometere Array (SKA). This technique is especially well-suited to the…

Cosmology and Nongalactic Astrophysics · Physics 2017-04-28 Ian Harrison , Michelle Lochner , Michael L. Brown

Infrared 3.6 to 8 micron images of the Extended Groth Strip yield plausible counterpart identifications for all but one of 510 radio sources in the AEGIS20 S(1.4 GHz) > 50 micro-Jy sample. This is the first such deep sample that has been…

Cosmology and Nongalactic Astrophysics · Physics 2013-04-30 S. P. Willner , M. L. N. Ashby , P. Barmby , S. C. Chapman , A. Coil , M. Cooper , J. -S. Huang , R. Ivison , D. C. Koo

Infrared-faint radio sources (IFRSs) are a rare class of object which are relatively bright at radio wavelengths but very faint at infrared and optical wavelengths. Here we present sensitive near-infrared observations of a sample of these…

We examine the rest-frame far-infrared emission from powerful radio sources with 1.4GHz luminosity densities of 25<=log(L_1.4/WHz^-1)<=26.5 in the extragalactic Spitzer First Look Survey field. We combine Herschel/SPIRE flux densities with…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-20 N. Seymour , M. Symeonidis , M. Page , the HerMES Consortium

We carried out an unbiased, spectroscopic survey using the low-resolution module of the infrared spectrograph (IRS) on board Spitzer targeting two 2.6 square arcminute regions in the GOODS-North field. IRS was used in spectral mapping mode…

Cosmology and Nongalactic Astrophysics · Physics 2014-11-20 B. Bertincourt , G. Helou , P. Appleton , P. Ogle , G. Lagache , T. Brooke , J. -D. Smith , K. Sheth , D. Dale , M. Harwit , J. -L. Puget , H. Roussel

This paper presents the first results of a far-infrared search for protocluster-associated galaxy overdensities using the SPIRE instrument on-board the {\it Herschel} Space Observatory. Large ($\sim$400 arcmin$^{2}$) fields surrounding 26…

We report a moderate-depth (70 ksec), contiguous 0.7 sq.deg, Chandra survey, in the Lockman Hole Field of the Spitzer/SWIRE Legacy Survey coincident with a completed, ultra-deep VLA survey with deep optical and near-infrared imaging…

From a survey for redshifted HI 21-cm and OH 18-cm absorption in the hosts of a sample of radio galaxies and quasars, we detect HI in three of the ten and OH in none of the fourteen sources for which useful data were obtained. As expected…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-20 S. J. Curran , M. T. Whiting , M. T. Murphy , J. K. Webb , C. Bignell , A. G. Polatidis , T. Wiklind , P. Francis , G. Langston

We present results on a search of heavily obscured active galaxies z>1.7 using the rest-frame 9-20 keV excess for X-ray sources detected in the deep XMM-CDFS survey. Out of 176 sources selected with the conservative detection criteria (>8…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-11 K. Iwasawa , R. Gilli , C. Vignali , A. Comastri , W. N. Brandt , P. Ranalli , F. Vito , N. Cappelluti , F. J. Carrera , S. Falocco , I. Georgantopoulos , V. Mainieri , M. Paolillo

We describe an observational program aimed at understanding the radio emission from distant, rapidly evolving galaxy populations. These observations were carried out at 1.4 and 8.5 GHz with the VLA centered on the Hubble Deep Field,…

Astrophysics · Physics 2009-10-31 E. A. Richards

We present high-resolution observations of nearby ($z\lesssim 0.1$) galaxies that have hosted Type Ia supernovae to measure systemic spectroscopic redshifts using the Wide Field Spectrograph (WiFeS) instrument on the Australian National…

Cosmology and Nongalactic Astrophysics · Physics 2024-11-20 Anthony Carr , Tamara M. Davis , Ryan Camilleri , Chris Lidman , Kenneth C. Freeman , Dan Scolnic

A new sample of very large angular size radio sources has been selected from the 1.4 GHz VLA surveys: FIRST and NVSS. This sample will be very useful for an observational constraint on the time evolution of double radio sources, especially…

Astrophysics · Physics 2009-11-06 J. Machalski , M. Jamrozy , S. Zola

We present deep 350- and 1200-micron imaging of the region around 4C41.17 -- one of the most distant (z = 3.792) and luminous known radio galaxies -- obtained with the Submillimeter High Angular Resolution Camera (SHARC-II) and the Max…

Astrophysics · Physics 2009-11-13 T. R. Greve , D. Stern , R. J. Ivison , C. De Breuck , A. Kovács , F. Bertoldi