924 citations · 8.8k across the 129 of their papers we have counts for
36 papers · 1 filter
A time - luminosity correlation for Gamma Ray Bursts in the X - rays
M. G. Dainotti, V. F. Cardone, S. Capozziello
Gamma ray bursts (GRBs) have recently attracted much attention as a possible way to extend the Hubble diagram to very high redshift. However, the large scatter in their intrinsic p…
Halting eternal acceleration with an effective negative cosmological constant
Vincenzo F. Cardone, Rolando P. Cardenas, Yoelsy Leiva Nodal
In order to solve the problem of eternal acceleration, a model has been recently proposed including both a negative cosmological constant and a scalar field evolving under the…
Cosmography of f(R) gravity
S. Capozziello, V. F. Cardone, V. Salzano
It is nowadays accepted that the universe is undergoing a phase of accelerated expansion as tested by the Hubble diagram of Type Ia Supernovae (SNeIa) and several LSS observations.…
The Sersic Virial Hyperplane
S. Capozziello, V. F. Cardone, R. Molinaro +1
Early-type galaxies (ETGs) are known to possess a number of quite useful scaling relations among their photometric and/or kinematical quantities. We propose a unified picture reduc…
Dynamical and gravitational lensing properties of a new phenomenological model of elliptical galaxies
C. Tortora, V. F. Cardone, E. Piedipalumbo
Recent observations of the line of sight velocity profile of elliptical galaxies have furnished controversial results with some works favouring the presence of a large amount of da…
Gravitational lensing in fourth order gravity
S. Capozziello, V. F. Cardone, A. Troisi
Gravitational lensing is investigated in the weak field limit of fourth order gravity in which the Lagrangian of the gravitational field is modified by replacing the Ricci scalar c…
Dark energy and dark matter as curvature effects
S. Capozziello, V. F. Cardone, A. Troisi
Astrophysical observations are pointing out huge amounts of dark matter and dark energy needed to explain the observed large scale structures and cosmic accelerating expansion. Up…
Low surface brightness galaxies rotation curves in the low energy limit of gravity : no need for dark matter?
S. Capozziello, V. F. Cardone, A. - Troisi
We investigate the possibility that the observed flatness of the rotation curves of spiral galaxies is not an evidence for the existence of dark matter haloes, but rather a signal…
A fluid os strings as a viable candidate to the dark side of the universe
S. Capozziello, V. F. Cardone, G. Lambiase +1
We investigate the possibility that part of the dark matter is not made out of the usual cold dark matter (CDM) dustlike particles, but is under the form of a fluid of strings with…
Beyond the perfect fluid hypothesis for dark energy equation of state
V. F. Cardone, C. Tortora, A. Troisi +1
Abandoning the perfect fluid hypothesis, we investigate here the possibility that the dark energy equation of state (EoS) is a nonlinear function of the energy density . To…
Structure formation and CMBR anisotropy spectrum in the inflessence model
A. A. Sen, V. F. Cardone, S. Capozziello +1
The inflessence model has recently been proposed in an attempt to explain both early inflation and present day accelerated expansion within a single mechanism. The model has been s…
Observational constraints on dark energy with generalized equations of state
S. Capozziello, V. F. Cardone, E. Elizalde +2
We investigate the effects of viscosity terms depending on the Hubble parameter and its derivatives in the dark energy equation of state. Such terms are possible if dark energy is…
Dark energy exponential potential models as curvature quintessence
S. Capozziello, V. F. Cardone, E. Piedipalumbo +1
It has been recently shown that, under some general conditions, it is always possible to find a fourth order gravity theory capable of reproducing the same dynamics of a given dark…
Inflessence: a phenomenological model for inflationary quintessence
V. F. Cardone, A. Troisi, S. Capozziello
We present a phenomenologically motivated model which is able to give rise both to an inflationary epoch and to the present day cosmic acceleration. We introduce an approach where…
Modelling the Milky Way through adiabatic compression of cold dark matter halo
V. F. Cardone, M. Sereno
We use the adiabatic compression theory to build a physically well - motivated Milky Way mass model in agreement with the observational data. The visible mass of the Galaxy is dist…
Reconciling dark energy models with f(R) theories
S. Capozziello, V. F. Cardone, A. Troisi
Higher order theories of gravity have recently attracted a lot of interest as alternative candidates to explain the observed cosmic acceleration without the need of introducing any…
Spherical galaxy models with power law logarithmic slope
V. F. Cardone, E. Piedipalumbo, C. Tortora
We present a new family of spherically symmetric models for the luminous components of elliptical and spiral galaxies and their dark matter haloes. Our starting point is a general…
Higher Order Curvature Theories of Gravity Matched with Observations: a Bridge Between Dark Energy and Dark Matter Problems
S. Capozziello, V. F. Cardone, S. Carloni +1
Higher order curvature gravity has recently received a lot of attention due to the fact that it gives rise to cosmological models which seem capable of solving dark energy and quin…
Constraining dark energy models using the lookback time to galaxy clusters and the age of the universe
S. Capozziello, V. F. Cardone, M. Funaro +1
An impressive amount of different astrophysical data converges towards the picture of a spatially flat universe undergoing a today phase of accelerated expansion. The nature of the…
f(R) theories of gravity in Palatini approach matched with observations
S. Capozziello, V. F. Cardone, M. Francaviglia
We investigate the viability of f(R) theories in the framework of the Palatini approach as solutions to the problem of the observed accelerated expansion of the universe. Two physi…
Constraining Van der Waals quintessence by observations
S. Capozziello, V. F. Cardone, S. Carloni +4
We discuss an alternative approach to quintessence modifying the usual equation of state of the cosmological fluid in order to see if going further than the approximation of perfec…
Some astrophysical implications of dark matter and gas profiles in a new galaxy clusters model
V. F. Cardone, E. Piedipalumbo, C. Tortora
The structure of the dark matter and the thermodynamical status of the hot gas in galaxy clusters is an interesting and widely discussed topic in modern astrophysics. Recently, Ras…
Lens modelling and H_0 estimate in quadruply lensed systems
C. Tortora, E. Piedipalumbo, V. F. Cardone
We present a numerical method to estimate the lensing parameters and the Hubble constant H_0 from quadruply imaged gravitational lens systems. The lens galaxy is modeled using both…
Unified dark energy models : a phenomenological approach
V. F. Cardone, A. Troisi, S. Capozziello
A phenomenological approach is proposed to the problem of universe accelerated expansion and of the dark energy nature. A general class of models is introduced whose energy density…