Search
Now showing items 81-90 of 99
Herschel-ATLAS: far-infrared properties of radio-selected galaxies
(2010)
We use the Herschel-Astrophysical Terahertz Large Area Survey (ATLAS) science demonstration data to investigate the star formation properties of radio-selected galaxies in the GAMA-9h field as a function of radio luminosity ...
Herschel-ATLAS: The dust energy balance in the edge-on spiral galaxy UGC 4754
(2010)
We use Herschel PACS and SPIRE observations of the edge-on spiral galaxy UGC 4754, taken as part of the H-ATLAS SDP observations, to investigate the dust energy balance in this galaxy. We build detailed SKIRT radiative ...
Evidence of different star formation histories for high- and low-luminosity radio galaxies
(2010)
We present the results of our investigation into the stellar populations of 24 radio galaxies at z≃ 0.5 drawn from four complete, low-frequency-selected radio surveys. We use the strength of the 4000-Å break as an indicator ...
Photometric redshift estimation using Gaussian processes
(2010)
We present a comparison between Gaussian processes (GPs) and artificial neural networks (ANNs) as methods for determining photometric redshifts for galaxies, given training-set data. In particular, we compare their degradation ...
X-ray groups and clusters of galaxies in the Subaru–XMM Deep Field
(2010)
We present the results of a search for galaxy clusters in the Subaru–XMM Deep Field (SXDF). We reach a depth for a total cluster flux in the 0.5–2 keV band of 2 × 10−15 erg cm−2 s−1 over one of the widest XMM–Newton ...
The detection of a population of submillimeter-bright, strongly lensed galaxies
(2010)
Gravitational lensing is a powerful astrophysical and cosmological probe and is particularly valuable at submillimeter wavelengths for the study of the statistical and individual properties of dusty star-forming galaxies. ...
When galaxies collide : understanding the broad absorption-line radio galaxy 4C +72.26
(2010)
We present a range of new observations of the 'broad absorption-line radio galaxy' 4C +72.26 (z≈ 3.5) , including sensitive rest-frame ultraviolet integral field spectroscopy using the Gemini/GMOS-N instrument and Subaru/CISCO ...
Herschel-ATLAS: Extragalactic number counts from 250 to 500 microns
(2010)
Aims. The Herschel-ATLAS survey (H-ATLAS) will be the largest area survey to be undertaken by the Herschel Space Observatory. It will cover 550 sq. deg. of extragalactic sky at wavelengths of 100, 160, 250, 350 and 500 μm ...
Constraints on star-forming galaxies at z≥ 6.5 from HAWK-I Y-band imaging of GOODS-South
(2010)
We present the results of our search for high-redshift Lyman-break galaxies over the GOODS-South field. We use Hubble Space Telescope (HST)-ACS data in B, V, i' & z', Very Large Telescope (VLT)-ISAAC J and Ks, Spitzer–Infrared ...
The environments of z ~ 1 active galactic nuclei at 3.6 μm
(2010)
We present an analysis of a large sample of active galactic nuclei (AGN) environments at z∼ 1 using stacked Spitzer data at 3.6 μm. The sample contains type 1 and type 2 AGN in the form of quasars and radio galaxies, and ...