English
Related papers

Related papers: Deep 3 GHz Number Counts from a P(D) Fluctuation A…

200 papers

We examine the brightness of the Cosmic Radio Background (CRB) by comparing the contribution from individual source counts to absolute measurements. We use a compilation of radio counts to estimate the contribution of detected sources to…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-27 Tessa Vernstrom , Douglas Scott , Jasper Wall

BLAST (Balloon-borne Large-Aperture Submillimeter Telescope) performed the first deep and wide extragalactic survey at 250, 350 and 500 um. The extragalactic number counts at these wavelengths are important constraints for modeling the…

Cosmology and Nongalactic Astrophysics · Physics 2010-05-06 M. Béthermin , H. Dole , M. Cousin , N. Bavouzet

Foreground radio sources are a major contaminant for centimetre-wave cosmic microwave background (CMB) measurements and the 9C survey was set up as part of the observing strategy of the CMB telescope, the Very Small Array. Prior to this…

Astrophysics · Physics 2007-05-23 E. M. Waldram , G. G. Pooley

Non-thermal properties of galaxy clusters have been studied with detailed and deep radio images in comparison with X-ray data. While much progress has been made, most of the studied clusters are at a relatively low redshift (z < 0.3). We…

Cosmology and Nongalactic Astrophysics · Physics 2020-08-26 G. Giovannini , M. Cau , A. Bonafede , H. Ebeling , L. Feretti , M. Girardi , M. Gitti , F. Govoni , A. Ignesti , M. Murgia , G. B. Taylor , V. Vacca

We present mid-infrared galaxy number counts based on the Early Release Observations obtained by the James Webb Space Telescope (JWST) at 7.7-, 10- and 15-$\mu$m (F770W, F1000W and F1500W, respectively) bands of the Mid-Infrared Instrument…

Remnant radio galaxies represent an important phase in the life-cycle of radio active galactic nuclei. It is suggested that in this phase, the jets have switched off and the extended emission is fading rapidly. This phase is not…

Astrophysics of Galaxies · Physics 2021-09-22 N. Jurlin , M. Brienza , R. Morganti , Y. Wadadekar , C. H. Ishwara-Chandra , N. Maddox , V. Mahatma

Radio surveys with the Australia Telescope Compact Array have been carried out at 1.4 and 2.4 GHz with a limiting flux of 0.2 mJy at each frequency in the Marano Field, in which deep optical and X-ray (ROSAT) data are also available. In…

We present the low frequency (610 MHz) radio source counts of the VVDS-VLA field and investigate the radio spectral index properties of the sub-mJy population. We use new deep (r.m.s.$\simeq 50$ $\mu$Jy/beam) observations of the VVDS-VLA…

We present a catalog of 624 radio sources detected around the North Celestial Pole (NCP) with the 21 Centimeter Array (21CMA), a radio interferometer dedicated to the statistical measurement of the epoch of reionization (EoR). The data are…

Astrophysics of Galaxies · Physics 2016-12-14 Qian Zheng , Xiang-Ping Wu , Melanie Johnston-Hollitt , Jun-Hua Gu , Haiguang Xu

We develop an absolute flux density scale for cm-wavelength astronomy by combining accurate flux density ratios determined by the VLA between the planet Mars and a set of potential calibrators with the Rudy thermophysical emission model of…

Instrumentation and Methods for Astrophysics · Physics 2015-06-12 Rick A. Perley , Bryan J. Butler

We report initial results of far-infrared observations of the Lockman hole with Far-Infrared Surveyor (FIS) onboard the AKARI infrared satellite. On the basis of slow scan observations of a 0.6 deg x 1.2 deg contiguous area, we obtained…

We present galaxy counts at 15 microns using the Japanese AKARI satellite's NEP-deep and NEP-wide legacy surveys at the North Ecliptic Pole. The total number of sources detected are approximately 6700 and 10,700 down to limiting fluxes of…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-18 C. P. Pearson , S. Oyabu , T. Wada , H. Matsuhara , H. M. Lee , S. J. Kim , T. Takagi , T. Goto , M. S. Im , S. Serjeant , M. G. Lee , J. W. Ko , G. J. White , O. Ohyama

Extragalactic radio sources are a unique cosmological probe in that they trace large-scale structure on scales inaccessible to other wavelengths. However as radio survey data is inherently 2D, the redshift distribution, N(z), is necessary…

Astrophysics · Physics 2007-05-23 C A Jackson , J V Wall

From 1979--1996 the Green Bank Interferometer was used by the Naval Research Laboratory to monitor the flux density from 146 compact radio sources at frequencies near 2 and 8 GHz. We filter the ``light curves'' to separate intrinsic…

Astrophysics · Physics 2009-11-11 B. Rickett , T. J. W. Lazio , F. D. Ghigo

We use the SCUBA-2 submillimeter camera mounted on the JCMT to obtain extremely deep number counts at 450 and 850um. We combine data on two cluster lensing fields, A1689 and A370, and three blank fields, CDF-N, CDF-S, and COSMOS, to measure…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-17 Chian-Chou Chen , Lennox L. Cowie , Amy J. Barger , Caitlin. M. Casey , Nicholas Lee , David B. Sanders , Wei-Hao Wang , Jonathan P. Williams

The source-count distribution as a function of their flux, dN/dS, is one of the main quantities characterizing gamma-ray source populations. We employ statistical properties of the Fermi Large Area Telescope (LAT) photon counts map to…

High Energy Astrophysical Phenomena · Physics 2016-07-28 Hannes-S. Zechlin , Alessandro Cuoco , Fiorenza Donato , Nicolao Fornengo , Andrea Vittino

High-redshift radio-loud quasars are used to, among other things, test the predictions of cosmological models, set constraints on black hole growth in the early universe and understand galaxy evolution. Prior to this paper, 20 extragalactic…