415 citations · 2.9k across the 213 of their papers we have counts for
34 papers · 1 filter
Properties of bars in the local universe
J. Méndez-Abreu, J. A. L. Aguerri, E. M. Corsini
We studied the fraction and properties of bars in a sample of about 3000 galaxies extracted from SDSS-DR5. This represents a volume limited sample with galaxies located between red…
Structural properties of disk galaxies: The intrinsic equatorial ellipticity of bulges
J. Méndez-Abreu, J. A. L. Aguerri, E. M. Corsini +1
The structural parameters of a magnitude-limited sample of 148 unbarred S0-Sb galaxies were derived to study the correlations between bulge and disk parameters as well as the proba…
The Population of Dark Matter Subhaloes: Mass Functions and Average Mass Loss Rates
Carlo Giocoli, Giuseppe Tormen, Frank C. van den Bosch
Using a cosmological N-Body simulation and a sample of re-simulated cluster-like haloes, we study the mass loss rates of dark matter subhaloes, and interpret the mass function of s…
Structural properties of disk galaxies I. The intrinsic ellipticity of bulges
J. Mendez-Abreu, J. A. L. Aguerri, E. M. Corsini +1
(Abridged) A variety of formation scenarios was proposed to explain the diversity of properties observed in bulges. Studying their intrinsic shape can help in constraining the domi…
Modeling the chemical evolution of Omega Centauri using three-dimensional hydrodynamical simulations
A. Marcolini, A. Sollima, A. D'Ercole +2
We present a hydrodynamical and chemical model for the globular cluster Omega Cen, under the assumption that it is the remnant of an ancient dwarf spheroidal galaxy (dSph), the bul…
What hydrodynamical simulations tell us about the radial properties of the stellar populations in Ellipticals
A. Pipino, A. D'Ercole, F. Matteucci
Elliptical galaxies probably host the most metal rich stellar populations in the Universe. The processes leading to both the formation and the evolution of such stars are discussed…
XMM-Newton unveils the type 2 nature of the BLRG 3C 445
P. Grandi, M. Guainazzi, M. Cappi +1
We present an observation of XMM-Newton that unambiguously reveals the ``Seyfert 2'' nature of the Broad Line Radio Galaxy 3C 445. For the first time the soft excess of this source…
Relativistic MHD Winds from Rotating Neutron Stars
Bucciantini, N., Thompson +7
We review here recent numerical results concerning the acceleration and collimation of relativistic outflows from neutron stars, and we discuss their implications for models of mag…
Modeling the X-ray fractional variability spectrum of Active Galactic Nuclei using multiple flares
R. W. Goosmann, M. Dovciak, V. Karas +3
Using Monte-Carlo simulations of X-ray flare distributions across the accretion disk of active galactic nuclei (AGN), we obtain modeling results for the energy-dependent fractional…
Magnetic flares in Active Galactic Nuclei: Modeling the iron Kalpha-line
R. W. Goosmann, B. Czerny, M. Mouchet +5
The X-ray spectra of Active Galactic Nuclei (AGN) are complex and vary rapidly in time as seen in recent observations. Magnetic flares above the accretion disk can account for the…
Newly discovered active binaries in the RasTyc sample of stellar X-ray sources
A. Frasca, P. Guillout, E. Marilli +2
We present preliminary results of follow-up optical observations, both photometric and spectroscopic, of stellar X-ray sources, selected from the cross-correlation of ROSAT All-Sky…
About the evolution of Dwarf Spheroidal Galaxies
A. Marcolini, A. D'Ercole, F. Brighenti +1
We present 3D hydrodynamic simulations aimed at studying the dynamical and chemical evolution of the interstellar medium in dwarf spheroidal galaxies. This evolution is driven by t…
The Galaxy Mass Function up to z=4 in the GOODS-MUSIC sample: into the epoch of formation of massive galaxies
A. Fontana, S. Salimbeni, A. Grazian +10
The goal of this work is to measure the evolution of the Galaxy Stellar Mass Function and of the resulting Stellar Mass Density up to redshift ~4, in order to study the assembly of…
The impact of stellar rotation on the CNO abundance patterns in the Milky Way at low metallicities
C. Chiappini, R. Hirschi, F. Matteucci +3
We investigate the effect of new stellar models, which take rotation into account, computed for very low metallicities on the chemical evolution of the earliest phases of the Milky…
The structure and X-ray radiation spectra of illuminated accretion disks in AGN. III. Modeling fractional variability
R. W. Goosmann, B. Czerny, M. Mouchet +5
[abridged] Extending the work of Czerny et al. (2004), we model the fractional variability amplitude due to distributions of hot spots co-orbiting on the accretion disk around a su…
The 2005 outburst of the halo black hole X-ray transient XTE J1118+480
C. Zurita, M. A. P. Torres, D. Steeghs +15
We present optical and infrared monitoring of the 2005 outburst of the halo black hole X-ray transient XTE J1118+480. We measured a total outburst amplitude of ~5.7+-0.1 mag in the…
Dynamical and chemical evolution of NGC1569
S. Recchi, G. Hensler, L. Angeretti +1
Blue Compact Dwarf and Dwarf Irregular galaxies are generally believed to be unevolved objects, due to their blue colors, compact appearance and large gas fractions. Many of these…
Sulphur abundance in Galactic stars
E. Caffau, P. Bonifacio, R. Faraggiana +3
We investigate sulphur abundance in 74 Galactic stars by using high resolution spectra obtained at ESO VLT and NTT telescopes. For the first time the abundances are derived, where…
The metal abundance distribution of the oldest stellar component in the Sculptor dwarf spheroidal galaxy
G. Clementini, V. Ripepi, A. Bragaglia +3
(abridged): Low resolution spectroscopy obtained with FORS2 at the Very Large Telescope (VLT) has been used to measure individual metal abundances ([Fe/H]) for 107 RR Lyrae stars,…
A Supernova Factory in Mrk 273?
M. Bondi, M-A. Perez-Torres, D. Dallacasa +1
We report on 1.6 and 5.0 GHz observations of the ultraluminous infrared galaxy (ULIRG) Mrk 273, using the European VLBI Network (EVN) and the Multi-Element Radio-Linked Interferome…
Cryogenic Filters for RFI Mitigation in Radioastronomy
G. Tuccari, A. Caddemi, S. Barbarino +4
RFI mitigation in Radioastronomy can be achieved adopting cryogenic filters in appropriate typologies. A study has been conducted in L, C and X band with the evaluation of the filt…
The s-process weak component: uncertainties due to convective overshooting
Vincenzo Costa, Maria Letizia Pumo, Alfio Bonanno +1
Using a new s-nucleosynthesis code, coupled with the stellar evolution code Star2003, we performed simulations to study the impact of the convection treatment on the s-process duri…
A detailed study of the nuclear region of Mrk 273
M. Bondi, D. Dallacasa, M. A. Peerez Torres +1
We present 5 GHz EVN+MERLIN observations of the nuclear region of the ultra luminous infrared galaxy Mrk 273. These observations confirms the detection, on the mas scale, of two re…
Variable stars in the dwarf irregular galaxy NGC 6822: the photometric catalogue
L. Baldacci, L. Rizzi, G. Clementini +1
Deep B,V time-series photometry obtained with the ESO Very Large Telescope has been used to identify variable stars in the dwarf irregular galaxy NGC 6822. We surveyed a 6.8x6.8 ar…