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

Scritto il 03 Set 2013 alle 01:39 in Pubblicazioni

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,…

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

Scritto il 13 Ago 2013 alle 01:39 in Pubblicazioni

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…

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Evolution of the Fundamental Plane for early-type galaxies up to z = 1.2

Scritto il 23 Lug 2013 alle 01:39 in Pubblicazioni

We studied the evolution of the Fundamental Plane in B- and g-bands, for
two samples of early-type galaxies at 0.2 < z < 0.35 and 0.35 <
z < 1.2. We found a difference in the intercept that can be
interpreted as galaxies at < z > ~0.7 being 0.68 and 0.52 mag
brighter in the B- and g-band respectively, than their local
counterparts. From the study of the Kormendy relation, we found the
existence of a population of very bright (-21.5 > M <SUB>g</SUB> >
-22.5) and compact (Re < 2 kpc) galaxies of which only a small
fraction of 0.4% exists at z =…

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