340 citations · 1.2k across the 28 of their papers we have counts for
10 papers · 1 filter
Stellar Populations of Late-Type Bulges at z=1 in the HUDF
N. P. Hathi, I. Ferreras, A. Pasquali +5
We combine the exceptional depth of the Hubble Ultra Deep Field (HUDF) images and the deep GRism ACS Program for Extragalactic Science (GRAPES) grism spectroscopy to explore the st…
Predicting spectral features in galaxy spectra from broad-band photometry
F. B. Abdalla, A. Mateus, W. A. Santos +3
We explore the prospects of predicting emission line features present in galaxy spectra given broad-band photometry alone. There is a general consent that colours, and spectral fea…
UV-optical colours as probes of early-type galaxy evolution
S. Kaviraj, K. Schawinski, J. E. G. Devriendt +25
We have studied ~2100 early-type galaxies in the SDSS DR3 which have been detected by the GALEX Medium Imaging Survey (MIS), in the redshift range 0 < z < 0.11. Combining GALEX UV…
Morphology and evolution of emission line galaxies in the Hubble Ultra Deep Field
N. Pirzkal, C. Xu, I. Ferreras +8
We investigate the properties and evolution of a sample of galaxies selected to have prominent emission lines in low-resolution grism spectra of the Hubble Ultra Deep Field (HUDF).…
The HI content of the recently discovered field dwarf galaxy APPLES1
A. Tarchi, J. Ott, A. Pasquali +3
We present observations in a search for neutral hydrogen associated with the recently detected field dwarf galaxy APPLES1, performed with the Parkes radiotelescope. The observed ra…
The formation history of the Galactic bulge
I. Ferreras, R. F. G. Wyse, J. Silk
The distributions of the stellar metallicities of K giant stars in several fields of the Galactic bulge, taken from the literature are compared with a simple model of star formatio…
How old is the Universe ? Setting new constraints on the age of the Universe
I. Ferreras, A. Melchiorri, J. Silk
There are three independent techniques for determining the age of the universe: via cosmochronology of long-lived radioactive nuclei, via stellar modelling and population synthesis…
On breaking the age-metallicity degeneracy in early-type galaxies: Outflows versus Star Formation Efficiency
I. Ferreras, J. Silk
A simple model of chemical enrichment in cluster early-type galaxies is presented where the main parameters driving the formation of the stellar component are reduced to four: infa…
Probing the evolution of early-type cluster galaxies through chemical enrichment
I. Ferreras, J. Silk
A simple chemical enrichment model for cluster early-type galaxies is described in which the mechanisms considered in the evolutionary model are infall of primordial gas, outflows…
Are optically-selected QSO catalogs biased ?
I. Ferreras, N. Benitez, E. Martinez-Gonzalez
A thorough study of QSO-galaxy correlations has been done on a region close to the North Galactic Pole using a complete subsample of the optically selected CFHT/MMT QSO survey and…