111 citations · 1.2k across the 75 of their papers we have counts for
21 papers · 1 filter
Black Holes in Bulk Viscous Cosmology
Francesco De Paolis, Mubasher Jamil, Asghar Qadir
We investigate the effects of the accretion of phantom energy with non-zero bulk viscosity onto a Schwarzschild black hole and show that black holes accreting viscous phantom energ…
Sgr A: a laboratory to measure the central black hole and cluster parameters
A. A. Nucita, F. De Paolis, G. Ingrosso +2
Several stars orbit around a black hole candidate of mass M, in the region of the Galactic Center (GC). Looking for General Relativistic (GR) periastron…
Probing MACHOs by observation of M31 pixel lensing with the 1.5m Loiano telescope
S. Calchi Novati, G. Covone, F. De Paolis +9
We analyse a series of pilot observations in order to study microlensing of (unresolved) stars in M31 with the 1.5m Loiano telescope, including observations on both identified vari…
Direct Measurements of Black Hole Charge with Future Astrometrical Missions
A. F. Zakharov, F. De Paolis, G. Ingrosso +1
Recently, Zakharov et al. (2005) considered the possibility of evaluating the spin parameter and the inclination angle for Kerr black holes in nearby galactic centers by using futu…
Binary black holes in Mkns as sources of gravitational radiation for space based interferometers
F. De Paolis, G. Ingrosso, A. A. Nucita +1
The possibility that some Markarian objects (e.g. Mkn 501, Mkn 421 and Mkn 766) host massive binary black hole systems with eccentric orbits at their centers has been considered. T…
A note on gravitational wave lensing
F. De Paolis, G. Ingrosso, A. A. Nucita +1
In a recent paper [Ruffa] it was proposed that the massive black hole at the Galactic center may act as a gravitational lens focusing gravitational wave energy to the Earth. Consid…
Astrophysical implications of binary black holes in BL Lacertae objects
F. De Paolis, G. Ingrosso, A. A. Nucita
Some BL Lacertae objects show a periodic behaviour in their light curves that is often attributed to the orbital motion of a central binary black hole system. On this basis, and as…
Microlensing search towards M31
S. Calchi Novati, G. Iovane, A. A. Marino +26
We present the first results of the analysis of data collected during the 1998-99 observational campaign at the 1.3 meter McGraw-Hill Telescope, towards the Andromeda galaxy (M31),…
High-energy neutrino emission from Gamma-Ray Bursts
F. De Paolis, G. Ingrosso, D. Orlando +1
Gamma-Ray Bursts (GRBs) are expected to efficiently accelerate protons up to relativistic energies. High-energy photons can originate from decay of neutral pions produced by the in…
Astrophysical constraints on a possible neutrino ball at the Galactic Center
F. De Paolis, G. Ingrosso, A. A. Nucita +3
The nature of the massive object at the Galactic Center (Sgr A) is still unclear even if various observational campaigns led many authors to believe that our Galaxy hosts a s…
Astrophysical implications of gravitational microlensing of gravitational waves
F. De Paolis, G. Ingrosso, A. A. Nucita
Astrophysical implications of gravitational microlensing of gravitational waves emitted by rotating neutron stars (NSs) are investigated. In particular, attention is focused on the…
Slott-Agape Project
AGAPE Collaboration, V. Bozza, S. Calchi Novati +19
SLOTT-AGAPE (Systematic Lensing Observation at Toppo Telescope - Andromeda Gravitational Amplification Pixel Lensing Experiment) is a new collaboration project among international…
Gamma ray astronomy and baryonic dark matter
F. De Paolis, G. Ingrosso, Ph. Jetzer +1
Recently, Dixon et al. have re-analyzed the EGRET data, finding a statistically significant diffuse -ray emission from the galactic halo. We show that this emission can naturall…
Binary brown dwarfs in the galactic halo?
F. De Paolis, G. Ingrosso, Ph. Jetzer +1
Microlensing events towards the Large Magellanic Cloud entail that a sizable fraction of dark matter is in the form of MACHOs (Massive Astrophysical Compact Halo Objects), presumab…
Halo dark clusters of brown dwarfs and molecular clouds
F. De Paolis, G. Ingrosso, Ph. Jetzer +1
The discovery of Massive Astrophysical Compact Halo Objects (MACHOs) in microlensing experiments makes it compelling to understand their physical nature, as well as their formation…
Pulsars Tracing Black Holes in Globular Clusters
F. De Paolis, V. G. Gurzadyan, G. Ingrosso
Results of precise measurements of the periods of pulsars discovered in the central regions of globular clusters are shown to be approaching the capabilities of testing the existen…
Microlensing implications for halo dark matter
Philippe Jetzer
The French collaboration EROS and the American-Australian collaboration MACHO have reported the observation of altogether 10 microlensing events by monitoring during several…
Microlensing Implications for Halo Dark Matter
Philippe Jetzer, Eduard Masso
The most accurate way to get information on the mass of the MACHOs (Massive Astrophysical Compact Halo Objects) is to use the method of mass moments. For the microlensing events de…
Microlensing rates from self-consistent galactic models
F. De Paolis, G. Ingrosso, Ph. Jetzer
We study different models of dark matter distribution for the halo of our galaxy. In particular, we consider Eddington and King-Michie models, which [C[C, which include anisotropy…
Observing molecular hydrogen clouds and dark massive objects in galactic halos
F. De Paolis, G. Ingrosso, Ph. Jetzer +2
Molecular hydrogen clouds can contribute substantially to the galactic halo< dark matter and may lead to the birth of massive halo objects (MHOs) observed indirectly by microlensin…
A case for a baryonic dark halo
F. De Paolis, G. Ingrosso, Ph. Jetzer +1
Recent observations of microlensing events in the Large Magellanic Cloud by the MACHO and EROS collaborations suggest that an important fraction of the galactic halo is in the form…