Publications (16)
Constraints on photoionization feedback from number counts of ultra-faint high-redshift galaxies in the Frontier Fields
M. Castellano, B. Yue, A. Ferrara +11
We exploit a sample of ultra-faint high-redshift galaxies (demagnified HST magnitude ) in the Frontier Fields clusters A2744 and M0416 to constrain a theoretical mod…
Euclid Preparation IV. Impact of undetected galaxies on weak-lensing shear measurements
Euclid Collaboration, N. Martinet, T. Schrabback +22
In modern weak-lensing surveys, the common approach to correct for residual systematic biases in the shear is to calibrate shape measurement algorithms using simulations. These sim…
First observational support for overlapping reionized bubbles generated by a galaxy overdensity
M. Castellano, P. Dayal, L. Pentericci +21
We present the analysis of deep HST multi-band imaging of the BDF field specifically designed to identify faint companions around two of the few Ly-alpha emitting galaxies spectros…
Euclid preparation: X. The Euclid photometric-redshift challenge
Euclid Collaboration, G. Desprez, S. Paltani +170
Forthcoming large photometric surveys for cosmology require precise and accurate photometric redshift (photo-z) measurements for the success of their main science objectives. Howev…
A-PHOT: a new, versatile code for precision aperture photometry
E. Merlin, S. Pilo, A. Fontana +5
We present A-PHOT, a new publicly available code for performing aperture photometry on astronomical images, that is particularly well suited for multi-band extragalactic surveys. A…
Spectroscopic investigation of a reionized galaxy overdensity at z=7
M. Castellano, L. Pentericci, E. Vanzella +17
We present deep spectroscopic follow-up observations of the Bremer Deep Field (BDF) where the two 7 bright Ly emitters (LAE) BDF521 and BDF3299 were previously discovere…
Characterizing elusive, faint dusty star-forming galaxies: a lensed, optically undetected ALMA galaxy at z~3.3
P. Santini, M. Castellano, A. Fontana +19
We present the serendipitous ALMA detection of a faint submillimeter galaxy (SMG) lensed by a foreground z~1 galaxy. By optimizing the source detection to deblend the system, we ac…
The Lyman Continuum escape fraction of faint galaxies at z~3.3 in the CANDELS/GOODS-North, EGS, and COSMOS fields with LBC
A. Grazian, E. Giallongo, D. Paris +41
The reionization of the Universe is one of the most important topics of present day astrophysical research. The most plausible candidates for the reionization process are star-form…
UV slope of z3 bright () Lyman-break galaxies in the COSMOS field
S. Pilo, M. Castellano, A. Fontana +7
We analyse a unique sample of 517 bright () LBGs at redshift z3 in order to characterise the distribution of their UV slopes and infer their dust extinction und…
The Lyman Continuum escape fraction of galaxies at z=3.3 in the VUDS-LBC/COSMOS field
A. Grazian, E. Giallongo, R. Gerbasi +52
The Lyman continuum (LyC) flux escaping from high-z galaxies into the IGM is a fundamental quantity to understand the physical processes involved in the reionization epoch. We have…
The ASTRODEEP Frontier Fields Catalogues: II - Photometric redshifts and rest-frame properties in Abell-2744 and MACS-J0416
M. Castellano, R. AmorÃn, E. Merlin +35
We present the first public release of photometric redshifts, galaxy rest-frame properties and associated magnification values in the cluster and parallel pointings of the first tw…
Optical Line Emission from z6.8 Sources with Deep Constraints on Ly Visibility
M. Castellano, L. Pentericci, A. Fontana +15
We analyze a sample of -dropout galaxies in the CANDELS GOODS South and UDS fields that have been targeted by a dedicated spectroscopic campaign aimed at detecting their Ly…
The ASTRODEEP Frontier Fields Catalogues: I - Multiwavelength photometry of Abell-2744 and MACS-J0416
E. Merlin, R. Amorìn, M. Castellano +28
We present multiwavelength photometric catalogues (HST, Spitzer and Hawk-I K band) for the first two of the Frontier Fields, Abell2744 and MACSJ0416 (plus their parallel fields). T…
On the faint-end of the galaxy luminosity function in the Epoch of Reionization: updated constraints from the HST Frontier Fields
B. Yue, M. Castellano, A. Ferrara +12
Ultra-faint galaxies are hosted by small dark matter halos with shallow gravitational potential wells, hence their star formation activity is more sensitive to feedback effects. Th…
Passive galaxies in the early Universe: ALMA confirmation of z~3-5 candidates in the CANDELS GOODS-South field
P. Santini, E. Merlin, A. Fontana +7
The selection of red, passive galaxies in the early Universe is very challenging, especially beyond z~3, and it is crucial to constrain theoretical modelling of the processes respo…
Red & Dead CANDELS: massive passive galaxies at the dawn of the Universe
E. Merlin, F. Fortuni, M. Torelli +7
We search the five CANDELS fields (COSMOS, EGS, GOODS-North, GOODS-South and UDS) for passively evolving a.k.a. "red and dead" massive galaxies in the first 2 Gyr after the Big Ban…