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Multi-wavelength landscape of the young galaxy cluster RXJ1257.2+4738 at z=0.866: I. The infrared view

We performed a thorough analysis of the star formation activity in the
young massive galaxy cluster RXJ1257+4738 at z=0.866, with emphasis on
the relationship between the local environment of the cluster galaxies
and their star formation activity. We present an optical and IR study
that benefited from the large amount of data available for this cluster,
including new OSIRIS/GTC and Herschel imaging observations. Using a
optical-to-NIR multi-wavelength catalogue, we measured photometric
redshifts through a chi2 SED-fitting procedure. We implemented a
reliable and carefully chosen cluster…


Lyman Break and UV-selected galaxies at z ˜ 1 - II. PACS 100 μm/160 μm FIR detections★

In this work, we report the Photodetector Array Camera and Spectrometer
(PACS) 100 μm/160 μm detections of a sample of 42 GALEX-selected
and far-infrared (FIR)-detected Lyman break galaxies (LBGs) at z ˜
1 located in the Cosmic Evolution Survey (COSMOS) field and analyse
their ultraviolet (UV) to FIR properties. The detection of these LBGs in
the FIR indicates that they have a dust content high enough so that its
emission can be directly detected. According to a spectral energy
distribution (SED) fitting with stellar population templates to their
UV-to-near-IR observed photometry,…


Lyman break and ultraviolet-selected galaxies at z ˜ 1 - I. Stellar populations from the ALHAMBRA survey

We take advantage of the exceptional photometric coverage provided by
the combination of GALEX data in the ultraviolet (UV) and the ALHAMBRA
survey in the optical and near-infrared to analyse the physical
properties of a sample of 1225 GALEX-selected Lyman break galaxies
(LBGs) at 0.8 ≲ z ≲ 1.2 that are located in the COSMOS field.
This is the largest sample of LBGs studied in this redshift range to
date. According to a spectral energy distribution (SED) fitting with
synthetic stellar population templates, we find that LBGs at z ˜ 1
are mostly young galaxies with a median age of 341 Myr and…