322 citations · 4.4k across the 115 of their papers we have counts for
6 papers · 1 filter
An inventory of the stellar initial mass function in early-type galaxies
Crescenzo Tortora, Aaron J. Romanowsky, Nicola R. Napolitano
Given a flurry of recent claims for systematic variations in the stellar initial mass function (IMF), we carry out the first inventory of the observational evidence using different…
Constraining decaying dark energy density models with the CMB temperature-redshift relation
Philippe Jetzer, Crescenzo Tortora
We discuss the thermodynamic and dynamical properties of a variable dark energy model with density scaling as , z being the redshift. These models lead to th…
Dark matter and alternative recipes for the missing mass
Crescenzo Tortora, Philippe Jetzer, Nicola R. Napolitano
Within the standard cosmological scenario the Universe is found to be filled by obscure components (dark matter and dark energy) for ~95% of its energy budget. In particular, almos…
Testing Yukawa-like potentials from f(R)-gravity in elliptical galaxies
N. R. Napolitano, S. Capozziello, A. J. Romanowsky +2
We present the first analysis of extended stellar kinematics of elliptical galaxies where a Yukawa--like correction to the Newtonian gravitational potential derived from f(R)-gravi…
Population Gradients in the SDSS Galaxy Catalog. The role of merging
C. Tortora, N. R. Napolitano
We investigate the role of the environment on the colour and stellar population gradients in a local sample of ~3500 central and ~1150 satellite SDSS early-type galaxies (ETGs). Th…
SPIDER - VI. The Central Dark Matter Content of Luminous Early-Type Galaxies: Benchmark Correlations with Mass, Structural Parameters and Environment
C. Tortora, F. La Barbera, N. R. Napolitano +2
We analyze the central dark-matter (DM) content of \sim 4,500 massive (M* \gsim 10^{10} Msun), low-redshift (z<0.1), early-type galaxies (ETGs), with high-quality ugrizYJHK photome…