Search Publications
Cosmological Parameters from Observations of Galaxy Clusters
Allen, Steven W.; Evrard, August E.; Mantz, Adam B.
Studies of galaxy clusters have proved crucial in helping to establish the standard model of cosmology, with a Universe dominated by dark matter and dark energy. A theoretical basis that describes clusters as massive, multicomponent, quasi-equilibrium systems is growing in its capability to interpret multiwavelength observations of expanding scope…
The Second Catalog of Active Galactic Nuclei Detected by the Fermi Large Area Telescope
Ozaki, M.; Troja, E.; Caraveo, P. A. +174 more
The second catalog of active galactic nuclei (AGNs) detected by the Fermi Large Area Telescope (LAT) in two years of scientific operation is presented. The second LAT AGN catalog (2LAC) includes 1017 γ-ray sources located at high Galactic latitudes (|b| > 10°) that are detected with a test statistic (TS) greater than 25 and associated statistic…
The MCXC: a meta-catalogue of x-ray detected clusters of galaxies
Arnaud, M.; Pointecouteau, E.; Pratt, G. W. +2 more
We present the compilation and properties of a meta-catalogue of X-ray detected clusters of galaxies, the MCXC. This very large catalogue is based on publicly available ROSAT All Sky Survey-based (NORAS, REFLEX, BCS, SGP, NEP, MACS, and CIZA) and serendipitous (160SD, 400SD, SHARC, WARPS, and EMSS) cluster catalogues. Data have been systematically…
Planck early results. I. The Planck mission
Kneissl, R.; Miville-Deschênes, M. -A.; Bernard, J. -P. +272 more
The European Space Agency's Planck satellite was launched on 14 May 2009, and has been surveying the sky stably and continuously since 13 August 2009. Its performance is well in line with expectations, and it will continue to gather scientific data until the end of its cryogenic lifetime. We give an overview of the history of Planck in its first y…
Planck early results. VIII. The all-sky early Sunyaev-Zeldovich cluster sample
Kneissl, R.; Dahle, H.; Miville-Deschênes, M. -A. +235 more
We present the first all-sky sample of galaxy clusters detected blindly by the Planck satellite through the Sunyaev-Zeldovich (SZ) effect from its six highest frequencies. This early SZ (ESZ) sample is comprised of 189 candidates, which have a high signal-to-noise ratio ranging from 6 to 29. Its high reliability (purity above 95%) is further ensur…
Planck early results. XIX. All-sky temperature and dust optical depth from Planck and IRAS. Constraints on the "dark gas" in our Galaxy
Kneissl, R.; Miville-Deschênes, M. -A.; Boulanger, F. +205 more
An all sky map of the apparent temperature and optical depth of thermal dust emission is constructed using the Planck-HFI (350µm to 2 mm) andIRAS(100µm) data. The optical depth maps are correlated with tracers of the atomic (Hi) and molecular gas traced by CO. The correlation with the column density of observed gas is linear in the low…
The Australia Telescope Compact Array Broad-band Backend: description and first results
Wieringa, M. H.; Massardi, M.; Johnston, S. +30 more
Here, we describe the Compact Array Broad-band Backend (CABB) and present first results obtained with the upgraded Australia Telescope Compact Array (ATCA). The 16-fold increase in observing bandwidth, from 2 × 128 to 2 × 2048 MHz, high-bit sampling and the addition of 16 zoom windows (each divided into further 2048 channels) provide major improve…
Planck early results. VII. The Early Release Compact Source Catalogue
Kneissl, R.; Miville-Deschênes, M. -A.; Bernard, J. -P. +228 more
A brief description of the methodology of construction, contents and usage of the Planck Early Release Compact Source Catalogue (ERCSC), including the Early Cold Cores (ECC) and the Early Sunyaev-Zeldovich (ESZ) cluster catalogue is provided. The catalogue is based on data that consist of mapping the entire sky once and 60% of the sky a second tim…
Observations of Arp 220 Using Herschel-SPIRE: An Unprecedented View of the Molecular Gas in an Extreme Star Formation Environment
Clements, D. L.; Wilson, Christine D.; Baes, Maarten +20 more
We present Herschel Spectral and Photometric Imaging Receiver Fourier Transform Spectrometer (Herschel SPIRE-FTS) observations of Arp 220, a nearby ultra-luminous infrared galaxy. The FTS provides continuous spectral coverage from 190 to 670 µm, a wavelength region that is either very difficult to observe or completely inaccessible from the …
Planck early results. XVIII. The power spectrum of cosmic infrared background anisotropies
Kneissl, R.; Miville-Deschênes, M. -A.; Bernard, J. -P. +202 more
Using Planck maps of six regions of low Galactic dust emission with a total area of about 140 deg2, we determine the angular power spectra of cosmic infrared background (CIB) anisotropies from multipole ℓ = 200 to ℓ = 2000 at 217, 353, 545 and 857 GHz. We use 21-cm observations of Hi as a tracer of thermal dust emission to reduce the al…