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The nature of giant clumps in distant galaxies probed by the anatomy of the Cosmic Snake
Antonio Cava, Daniel Schaerer, Johan Richard +4
Giant stellar clumps are ubiquitous in high-redshift galaxies. They are thought to play an important role in the build-up of galactic bulges and as diagnostics of star formation fe…
SHARDS Frontier Fields: Physical properties of a low mass Lyman-alpha emitter at z=5.75
Antonio Hernán-Caballero, Pablo G. Pérez-González, José M. Diego +20
We analyze the properties of a multiply-imaged Lyman-alpha (Lya) emitter at z=5.75 identified through SHARDS Frontier Fields intermediate-band imaging of the Hubble Frontier Fields…
Morphological Segregation in the Surroundings of Cosmic Voids
Elena Ricciardelli, Antonio Cava, Jesus Varela +1
We explore the morphology of galaxies living in the proximity of cosmic voids, using a sample of voids identified in the Sloan Digital Sky Survey Data Release 7. At all stellar mas…
Structural and dynamical modeling of WINGS clusters. I. The distribution of cluster galaxies of different morphological classes within regular and irregular clusters
Antonio Cava, Andrea Biviano, Gary A. Mamon +8
[Abridged] We use the WINGS database to select a sample of 67 nearby galaxy clusters with at least 30 spectroscopic members each. 53 of these clusters do not show evidence of subst…
The concentration-mass relation of clusters of galaxies from the OmegaWINGS survey
A. Biviano, A. Moretti, A. Paccagnella +8
The relation between a cosmological halo concentration and its mass (cMr) is a powerful tool to constrain cosmological models of halo formation and evolution. On the scale of galax…
Extreme magnification of a star at redshift 1.5 by a galaxy-cluster lens
Patrick L. Kelly, Jose M. Diego, Steven Rodney +42
Galaxy-cluster gravitational lenses can magnify background galaxies by a total factor of up to ~50. Here we report an image of an individual star at redshift z=1.49 (dubbed "MACS J…