10.9k citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Istituto Nazionale di Fisica Nucleare, Sezione di BolognaIT5.2k papers
- Centre National de la Recherche ScientifiqueFR4.2k papers
- Institut National de Physique Nucléaire et de Physique des ParticulesFR3.1k papers
- Istituto Nazionale di Fisica Nucleare, Sezione di Roma IIT3.1k papers
- Sapienza University of RomeIT2.9k papers
- European Organization for Nuclear ResearchCH2.9k papers
- Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di FrascatiIT2.9k papers
- Commissariat à l'Énergie Atomique et aux Énergies AlternativesFR2.7k papers
- The Ohio State UniversityUS2.7k papers
- University of PisaIT2.7k papers
- Istituto Nazionale di Fisica Nucleare, Sezione di PisaIT2.6k papers
- National and Kapodistrian University of AthensGR2.5k papers
150 papers · 1 filter
Parsec--scale radio jets in gamma--ray loud sources
T. Venturi, D. Dallacasa
We will present a multiepoch study of the three blazars 0954+658 (BL--Lac), PKS1510--089 (HPQ) and 1749+096 (BL--Lac). The first two sources are known to be --ray loud. Our stud…
3D Simulations of Galactic Winds in Dwarf Galaxies
Andrea Marcolini, Fabrizio Brighenti, Annibale D'Ercole
We present 3D hydrodynamical simulations of galactic winds in dwarf, gas-rich galaxies. The galaxy is moving through the ICM of a small galaxy group at v=200 km/s. The ram pressure…
Hard X-ray and radio observations of Abell 754
R. Fusco-Femiano, M. Orlandini, S. De Grandi +5
We present a long BeppoSAX observation of Abell 754 that reports a nonthermal excess with respect to the thermal emission at energies greater than ~45 keV. A VLA radio observation…
B2 0648+27: a radio galaxy in a major merger
R. Morganti, T. A. Oosterloo, A. Capetti +5
We present WSRT observations of the neutral hydrogen in the nearby radio galaxy B2 0648+27. In emission, we detect a very large amount of HI (M_HI = 1.1 x 10^10 M_sun) that is dist…
Some existence results for the Webster scalar curvature problem in presence of symmetry
Veronica Felli, Francesco Uguzzoni
We prove some existence results for the Webster scalar curvature problem on the Heisenberg group and on the unit sphere of , under the assumption of some natural…
Toward Solving the Cosmological Constant Problem?
Olindo Corradini, Alberto Iglesias, Zurab Kakushadze
We discuss the cosmological constant problem in the context of higher codimension brane world scenarios with infinite-volume extra dimensions. In particular, by adding higher curva…
Lobe Advance Velocities in the Extragalactic Compact Symmetric Object 4C 31.04
M. Giroletti, G. Giovannini, G. B. Taylor +3
We report on the results of a two epoch study of the low power Compact Symmetric Object 4C 31.04. Observations performed with the VLBA at 5 GHz in 1995 and 2000 have yielded images…
The black hole mass of low redshift radiogalaxies
D. Bettoni, R. Falomo, G. Fasano +1
We make use of two empirical relations between the black hole mass and the global properties (bulge luminosity and stellar velocity dispersion) of nearby elliptical galaxies, to in…
Cohomology of G-sheaves in positive characteristic
Niels Borne
Let X be a noetherian scheme defined over an algebraically closed field of positive characteristic p, and G be a finite group, of order divisible by p, acting on X. We introduce a…
The analytic value of a 3-loop sunrise graph in a particular kinematical configuration
P. Mastrolia, E. Remiddi
We consider the scalar integral associated to the 3-loop sunrise graph with a massless line, two massive lines of equal mass , a fourth line of mass equal to , and the exter…
Analytic evaluation of Feynman graph integrals
P. Mastrolia, E. Remiddi
We review the main steps of the differential equation approach to the analytic evaluation of Feynman graphs, showing at the same time its application to the 3-loop sunrise graph in…
Cosmological Effects of a Class of Fluid Dark Energy Models
Daniela Carturan, Fabio Finelli
We study the impact of a generalized Chaplygin gas as a candidate for dark energy on CMB anisotropies. The generalized Chaplygin gas is a fluid component with an exotic equation of…
A Measurement of the tau -> mu nu nu Branching Ratio
The OPAL collaboration, G. Abbiendi
The tau -> mu nu nu branching ratio has been measured using data collected from 1990 to 1995 by the OPAL detector at the LEP collider. The resulting value of B(tau -> mu nu nu) = 0…
Search for Long-lived Charged Massive Particles in anti-p p Collisions at s**1/2 = 1.8 TeV
D. Acosta
We report a search for production of long-lived charged massive particles in a data sample of 90 pb^{-1} of \sqrt{s} = 1.8 TeV p anti-p collisions recorded by the Collider Detector…
J-ψProduction via χ_c Decays in 920 GeV pA Interactions
B Collaboration
Using data collected by the HERA-B experiment, we have measured the fraction of Jψ's produced via radiative chi_c decays in interactions of 920 GeV protons with carbon and titanium…
Adiabatic and Isocurvature Perturbations for Multifield Generalized Einstein Models
Fabrizio Di Marco, Fabio Finelli, Robert Brandenberger
Low energy effective field theories motivated by string theory will likely contain several scalar moduli fields which will be relevant to early Universe cosmology. Some of these fi…
The nuclear accretion in the FR I radio galaxy IC4296 from CHANDRA and VLBA observations
S. Pellegrini, T. Venturi, A. Comastri +5
A high angular resolution study of the nucleus of the FR I galaxy IC4296 using Chandra ACIS-S and VLBA observations is presented, with the aim of studying the nature of the accreti…
Radio asymmetry in 3C99
F. Mantovani, R. Fanti, C. Ferrari +2
The N-galaxy 3C99, a Compact Steep-spectrum Source showing a triple asymmetric structure, has been observed with several arrays of radio telescopes at sub-arcsecond resolution. New…
The faintest star forming galaxies
Piero Ranalli
I briefly report on the X-ray detection of 10 radio sub-mJy sources in the 2 Ms Chandra observation of the Hubble Deep Field North region. These sources follow the same radio/X-ray…
Hard X-ray observations of Extremely Red Objects
Marcella Brusa
Extremely Red Objects (EROs, R-K>5) constitute a heterogenous class of extragalactic sources including high redshift elliptical galaxies, dusty star-forming systems and heavily obs…
Unconventional AGN in hard X-ray surveys
A. Comastri, M. Brusa, M. Mignoli +1
Extensive programs of follow-up observations of hard X-ray selected sources have unambiguosly revealed that the sources of the X-ray background are characterized by an extremely la…
Extremely Red Objects: an X-ray dichotomy
M. Brusa, A. Comastri, E. Daddi +3
We analyze the X-ray properties of a near-infrared selected (Ks < 20) sample of spectroscopically identified Extremely Red Objects (R-Ks>5) in a region of the Chandra Deep Field-So…
Numerical evaluation of master integrals from differential equations
M. Caffo, H. Czyz, E. Remiddi
The 4-th order Runge-Kutta method in the complex plane is proposed for numerically advancing the solutions of a system of first order differential equations in one external invaria…
Numerical evaluation of the general massive 2-loop self-mass master integrals from differential equations
M. Caffo, H. Czyz, E. Remiddi
The system of 4 differential equations in the external invariant satisfied by the 4 master integrals of the general massive 2-loop sunrise self-mass diagram is solved by the Runge-…