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The Herschel Multi-tiered Extragalactic Survey (HerMES) is a legacy programme designed to map a set of nested fields totalling ∼380 deg2. Fields range in size from 0.01 to ∼20 deg2, using the Herschel-Spectral and Photometric Imaging Receiver (SPIRE) (at 250, 350 and 500 μm) and the Herschel-Photodetector Array Camera and Spectrometer (PACS) (at 100 and 160(More)
Given multiband photometric data from the SDSS DR6, we estimate galaxy redshifts. We employ a Random Forest trained on color features and spectroscopic redshifts from 80,000 randomly chosen primary galaxies yielding a mapping from color to redshift such that the difference between the estimate and the spectroscopic redshift is small. Our methodology results(More)
We propose to describe the variety of galaxies from the Sloan Digital Sky Survey (SDSS) by using only one affine parameter. To this aim, we construct the Principal Curve (P-curve) passing through the spine of the data point cloud, considering the eigenspace derived from Principal Component Analysis (PCA) of morphological, physical and photometric galaxy(More)
Dust emission at submillimetre wavelengths allows us to trace the early phases of star formation in the Universe. In order to understand the physical processes involved in this mode of star formation, it is essential to gain knowledge about the dark matter structures – most importantly their masses – that submillimetre galaxies live in. Here we use the(More)
We analyze the clustering properties of ultraviolet selected galaxies by using GALEX SDSS data at z < 0.6 and CFHTLS deep u imaging at z ∼ 1. These datasets provide a unique basis at z ≤ 1 which can be directly compared with high redshift samples built with similar selection criteria. We discuss the dependence of the correlation function parameters (r0, δ)(More)
We present the first measurements of the angular correlation function of galaxies selected in the far (1530 8) and near (2310 8) ultraviolet from the GALEX survey fields overlapping SDSS DR5 in low Galactic extinction regions. The area used covers 120 deg (GALEX Medium Imaging Survey) down to magnitude AB 1⁄4 22, yielding a total of 100,000 galaxies. The(More)
The reliability of infrared (IR) and ultraviolet (UV) emissions to measure star formation rates in galaxies is investigated for a large sample of galaxies observed with the SPIRE and PACS instruments on Herschel as part of the HerMES project. We build flux-limited 250 μm samples of sources at redshift z < 1, cross-matched with the Spitzer/MIPS and GALEX(More)
Using a phenomenological approach, we self-consistently model the redshift evolution of the ultraviolet (UV) and infrared (IR) luminosity functions across cosmic time, as well as a range of observed IR properties of UV-selected galaxy population. This model is an extension of the 2SFM (2 star-formation modes) formalism, which is based on the observed(More)
Cosmic magnification is due to the weak gravitational lensing of sources in the distant Universe by foreground large-scale structure leading to coherent changes in the observed number density of the background sources. Depending on the slope of the background source number counts, cosmic magnification causes a correlation between the background and(More)
We present the first results obtained from the identification of ∼ 30 000 sources in the Spitzer/24μm observations of the COSMOS field at S24μm > ∼ 80μJy. Using accurate photometric redshifts (σz ∼ 0.12 at z∼ 2 for 24μm sources with i <∼ 25mag AB) and simple extrapolations of the number counts at faint fluxes we resolve with unprecedented detail the(More)