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 Milano BicoccaIT2.2k papers
- Centre National de la Recherche ScientifiqueFR1.6k papers
- Istituto Nazionale di Fisica Nucleare, Sezione di Roma IIT1.2k papers
- University of PaduaIT1.2k papers
- European Organization for Nuclear ResearchCH1.1k papers
- University of ZurichCH1.1k papers
- Institut National de Physique Nucléaire et de Physique des ParticulesFR1.1k papers
- Istituto Nazionale di Fisica Nucleare, Sezione di PadovaIT1.1k papers
- Istituto Nazionale di Fisica Nucleare, Sezione di GenovaIT1.1k papers
- Istituto Nazionale di Fisica Nucleare, Sezione di BolognaIT1.1k papers
- Massachusetts Institute of TechnologyUS1.1k papers
- University of BolognaIT1.1k papers
31 papers · 2 filters
Introducing GOLDMine: A new Galaxy Database on the WEB
G. Gavazzi, A. Boselli, A. Donati +2
The new World Wide Web site "GOLDMine" (Galaxy On Line Database Milano Network) (http://goldmine.mib.infn.it) contains a multiwavelength data-base of an optically selected sample o…
The XMM-Newton view of the radio-quiet neutron star 1E 1207.4-5209
A. De Luca, S. Mereghetti, P. A. Caraveo +3
We have observed the radio-quiet X-ray pulsar 1E 1207.4-5209 with the high throughput EPIC cameras onboard XMM-Newton. The spectrum of this peculiar source is characterized by two…
HST proper motion confirms the optical detection of PSR B1929+10
A. De Luca, R. P. Mignani, P. A. Caraveo +1
We have measured the proper motion of the candidate optical counterpart of the old, nearby pulsar PSR B1929+10, using a set of HST/STIS images collected in 2001, 7.2 years after th…
Mass of BL Lacs from the Velocity Dispersion of the Host Galaxy
A. Treves, N. Carangelo, R. Falomo +1
We report on new measurements of the stellar velocity dispersion of 4 BL Lac objects for which optical spectroscopy was gathered at the ESO 3.6m using EFOSC2. Assuming the M(BH)--(…
Young compact objects in the Solar vicinity
S. B. Popov, M. E. Prokhorov, M. Colpi +2
We present Log N -- Log S distribution for close-by young isolated neutron stars. On the basis of this distribution it is shown that the seven ROSAT isolated neutron stars (if they…
The r'-band luminosity function of Abell1367: a comparison with Coma
J. Iglesias-Paramo, A. Boselli, G. Gavazzi +2
We made a large (approximately 1degr x 1degr) r'-band imaging survey of the central regions of the two nearby clusters of galaxies, Abell1367 and Coma. The data, presented as a cat…
Spectroscopy of BL Lac Objects: new redshifts and mis-identified sources
N. Carangelo, R. Falomo, J. Kotilainen +2
We are carrying out a program of high signal to noise optical spectroscopy of BL Lacs with unknown or tentative redshift. Here we report some preliminary results. New redshifts are…
Halpha surface photometry of galaxies in the Virgo cluster. IV: the current star formation in nearby clusters of galaxies
G. Gavazzi, A. Boselli, P. Pedotti +2
Halpha+[NII] imaging observations of 369 late-type galaxies in the Virgo cluster and in the Coma/A1367 supercluster are analyzed. They constitute an optically selected sample (m_p<…
Cosmic opacity to CMB photons and polarization measurements
L. P. L. Colombo, S. A. Bonometto
Anisotropy data analysis leaves a significant degeneracy between primeval spectral index (n_s) and cosmic opacity to CMB photons (τ). Low--l polarization measures, in principle, ca…
Formation of an evanescent proto-neutron star binary and the origin of pulsar kicks
Monica Colpi, Ira Wasserman
If core collapse leads to the formation of a rapidly rotating bar-unstable proto-neutron star surrounded by fall-back material, then we might expect it to cool and fragment to form…
Polarization angular spectra of Galactic synchrotron emission on arcminute scales
M. Tucci, E. Carretti, S. Cecchini +5
We study the angular power spectra of the polarized component of the Galactic synchrotron emission in the 28-deg^2 Test Region of the Southern Galactic Plane Survey at 1.4 GHz. The…
1.65 micron H-band Surface Photometry of Galaxies. X: Structural and Dynamical Properties of Elliptical Galaxies
S. Zibetti, G. Gavazzi, M. Scodeggio +2
We analyse the structural and dynamical properties of a sample of 324 nearby elliptical and dwarf elliptical galaxies observed during an extensive NIR survey in H-band (1.65 micron…
Non linear predictions from linear theories in models with Dark Energy
R. Mainini, A. V. Maccio', S. A. Bonometto
We study the cluster mass function and its evolution in different models with Dark Energy arising from a self--interacting scalar field, with Ratra-Peebles and SUGRA potentials. Co…
The Assembly and Merging History of Supermassive Black Holes in Hierarchical Models of Galaxy Formation
Marta Volonteri, Francesco Haardt, Piero Madau
We assess models for the assembly of supermassive black holes (SMBHs) at the center of galaxies that trace their hierarchical build-up far up in the dark halo `merger tree'. We ass…
BeppoSAX ToO Observations on BLAZARS
Gianpiero Tagliaferri, Gabriele Ghisellini, Marcello Ravasio
We summarize the results of BeppoSAX ToO observation of blazars that were known to be in a high state from observations carried out in the optical or X-ray or TeV bands.In some of…
An XMM-Newton study of the 401 Hz accreting pulsar SAX J1808.4-3658 in quiescence
S. Campana, L. Stella, F. Gastaldello +6
SAX J1808.4-3658 is a unique source being the first Low Mass X-ray Binary showing coherent pulsations at a spin period comparable to that of millisecond radio pulsars. Here we pres…
The case of PSR J1911-5958A in the outskirts of NGC 6752: signature of a black hole binary in the cluster core?
Monica Colpi, Andrea Possenti, Alessia Gualandris
We have investigated different scenarios for the origin of the binary millisecond pulsar PSR J1911-5958A in NGC 6752, the most distant pulsar discovered from the core of a globular…
X-ray background measurements with XMM-Newton EPIC
D. H. Lumb, R. S. Warwick, M. Page +1
We discuss the methods used to compile a high signal-to-noise dataset representative of both the instrumental and cosmic background signal measured at high galactic latitude by the…
The Halo Density Profiles with Non-Standard N-body Simulations
Elena D'Onghia, Claudio Firmani, Guido Chincarini
We propose a new numerical procedure to simulate a single dark halo of any size and mass in a hierarchical framework coupling the extended Press-Schechter formalism (EPSF) to N-bod…
Studying the Cosmic X-ray Background with XMM-Newton
A. De Luca, S. Molendi
We present a work in progress aimed at measuring the spectrum of the Cosmic X-ray Background (CXB) with the EPIC detectors onboard XMM-Newton. Our study includes a detailed charact…
XMM-Newton and Wide Field Optical Imaging to crack the mystery of unidentified gamma-ray sources
P. A. Caraveo, A. De Luca, N. La Palombara +5
The limited angular resolution of gamma-ray telescopes prevents the straight identification of the majority of the sources detected so far. While the only certified galactic gamma-…
The power-law behaviours of angular spectra of polarized Galactic synchrotron
M. Bruscoli, M. Tucci, V. Natale +4
We study the angular power spectra of polarized Galactic synchrotron in the range 10<l<800, at several frequencies between 0.4 and 2.7 GHz and at several Galactic latitudes up to n…
CMB Observations: improvements of the performance of correlation radiometers by signal modulation and synchronous detection
Daniele Spiga, Elia Battistelli, Giuliano Boella +3
Observation of the fine structures (anisotropies, polarization, spectral distortions) of the Cosmic Microwave Background (CMB) is hampered by instabilities, 1/f noise and asymmetri…
HST observations rule out the association between Cir X-1 and SNR G321.9-0.3
R. P. Mignani, A. De Luca, P. A. Caraveo +1
Cir X-1 is one of the most intriguing galactic X-ray sources. It is a ~16.6 days variable X/radio source, a type-I X-ray burster and a QPO emitter. In spite of an uncertain optical…