964 citations · 3.3k across the 72 of their papers we have counts for
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Spatial and observational homogeneities of the galaxy distribution in standard cosmologies
L. J. Rangel Lemos, Marcelo B. Ribeiro
This work discusses the possible empirical verification of the geometrical concept of homogeneity of the standard relativistic cosmology considering its various definitions of dist…
Self-consistent simulations of Nuclear Cluster formation through Globular Cluster orbital decay and merging
R. Capuzzo-Dolcetta, P. Miocchi
We present results of fully self-consistent N-body simulations of the motion of four globular clusters moving in the inner region of their parent galaxy. With regard to previous si…
Quiet Sun Magnetic Field Measurements Based on Lines with Hyperfine Structure
J. Sanchez Almeida, B. Viticchie, E. Landi Degl'Innocenti +1
The Zeeman pattern of MnI lines is sensitive to hyperfine structure (HFS) and, they respond to hG magnetic field strengths differently from the lines used in solar magnetometry. Th…
The X-ray view of the ionization cone in NGC5252
Matteo Guainazzi, Stefano Bianchi, Massimo Cappi +2
We present the results of a Chandra soft X-ray observation of the spectacular ionization cone in the nearby Seyfert 2 galaxy NGC 5252. As almost invariably observed in obscured AGN…
A Spitzer IRS Low-Resolution Spectroscopic Search for Buried AGNs in Nearby Ultraluminous Infrared Galaxies - A Constraint on Geometry between Energy Sources and Dust -
Masatoshi Imanishi, C. C. Dudley, Roberto Maiolino +3
We present the results of Spitzer IRS low-resolution infrared 5-35 micron spectroscopy of nearby ultraluminous infrared galaxies (ULIRGs) at z < 0.15. We focus on the search for th…
Simulations of globular clusters merging in galactic nuclear regions
P. Miocchi, R. Capuzzo Dolcetta, P. Di Matteo
We present the results of detailed N-body simulations regarding the interaction of four massive globular clusters in the central region of a triaxial galaxy. The systems undergo a…
X-ray absorption lines suggest matter infalling onto the central black-hole of Mrk 509
M. Dadina, M. Cappi, G. Malaguti +2
Evidence for both red- and blue-shifted absorption lines due to ionized Fe in the X-ray spectrum of the Seyfert 1 galaxy Mrk 509 are reported. These features appear to be transient…
Multiwavelength study of the very long GRB 020410
L. Nicastro, J. J. M. in 't Zand, L. Amati +13
GRB 020410 is by far the longest gamma-ray burst (with a duration of about 1600 s) to have been followed up from the X-ray through the radio regime. Afterglow emission was detected…
XMM-Newton Observations of the Field of Gamma-Ray Burst 980425
E. Pian, P. Giommi, L. Amati +12
The error box of GRB980425 has been observed by XMM-Newton in March 2002, with the aim of measuring the late epoch X-ray emission of the supernova 1998bw and of clarifying its supp…
X-ray Astronomical Polarimetry in the XEUS Era
E. Costa, P. Soffitta, G. Di Persio +9
X-ray Polarimetry is almost as old as X-ray Astronomy. Since the first discovery of X-ray sources theoretical analysis suggested that a high degree of linear polarization could be…
Study of X-ray reflection features in a sample of Sy 1s observed by BeppoSAX
A. De Rosa, A. C. Fabian, L. Piro +1
The ionized disc reflection model of Ross & Fabian is applied to a sample of five Seyfert 1 galaxies observed by BeppoSAX. Good fits were obtained for all the objects in the sample…
The cosmic flow in the Local Supercluster: Tracing PSCz tidal influence through optimized Least Action Principle
E. Romano-Diaz, E. Branchini, R. van de Weygaert +1
We assess the extent to which the flux-limited PSCz redshift sample is capable of accounting for the major share of mass concentrations inducing the external tidal forces affecting…
The Chandra High Resolution Spectra of Mkn 421
F. Nicastro, A. Fruscione, M. Elvis +3
Mkn 421 was observed by Chandra twice, on November 5, 1999 as part of the Chandra calibration program, with the ACIS-HETG configuration, and on May 29, 2000 following our Target Of…
Cosmic Shear and Clusters of Galaxies
Y. Mellier, L. van Waerbeke, T. Erben +9
The first detections of cosmic shear signal reported recently by 4 independent groups cover angular scales between one and 10 arcmin. On those scales, the cosmic shear is a signatu…
SNR0540-69 -the Crab twin- revisited: Chandra vs. HST
P. A. Caraveo, R. P. Mignani, A. De Luca +2
High resolution images of the Crab-like SNR SNR0540-69 have been recently obtained by the HRC, on board the Chandra X-ray Observatory, and by the FORS1 instrument, attached to ESO/…
The High Energy Resolution View of Ionized Absorbers in AGN
F. Nicastro, F. Fiore, G. Matt
A number of emission and absorption features are expected to be visible in high energy resolution X-ray spectra of type 1 AGN with ionized gas along the line of sight (so called "w…
The quiescent state broadband X-ray spectrum and variability of Mkn421
M. Guainazzi, G. Vacanti, A. Malizia +3
The BL Lac object Mkn~421 was observed three times by the X-ray observatory BeppoSAX in consecutive days during 1997 April and May. The source was in a quiescent state, with an ave…
BVRcIc photometry of GRB970508 optical remnant: May-August, 1997
V. V. Sokolov, A. I. Kopylov, S. V. Zharikov +3
We present the results of photometric observations of the variable optical source associated to the remnant of the gamma-ray burst GRB970508 performed at SAO RAS (Russia) from May…