1,122 research outputs found
Misaligned AGN with Fermi-LAT: A different perspective on relativistic jets
We review the latest results on misaligned AGNs (MAGNs), i.e. radio sources with the jet pointed away from the observer, detected by the Large Area Telescope (LAT) on board the Fermi satellite. We have analyzed the spectral
properties in the Îł-ray band of a sample of eleven radio sources, associated with the 3CR, 3CRR and Molonglo 4 Jy catalogues. The location of the Îł-ray emission, the
radiative processes responsible for it and the emerging jet structure are discussed in the framework of unification schemes for radio-loud AGNs. The results of a dedicated study on the nuclear spectral energy distribution (SED) of the radio galaxy NGC6251, one of the MAGNs of the LAT sample, are also presented
Critical chain length and superconductivity emergence in oxygen-equalized pairs of YBa2Cu3O6.30
The oxygen-order dependent emergence of superconductivity in YBa2Cu3O6+x is
studied, for the first time in a comparative way, on pair samples having the
same oxygen content and thermal history, but different Cu(1)Ox chain
arrangements deriving from their intercalated and deintercalated nature.
Structural and electronic non-equivalence of pairs samples is detected in the
critical region and found to be related, on microscopic scale, to a different
average chain length, which, on being experimentally determined by nuclear
quadrupole resonance (NQR), sheds new light on the concept of critical chain
length for hole doping efficiency.Comment: 7 RevTex pages, 2 Postscript figures. Submitted to Phys. Rev.
Synthesis and characterization of multiferroic BiMnO
We report on the high pressure synthesis of BiMnO, a manganite
displaying a "quadruple perovskite" structure. Structural characterization of
single crystal samples shows a distorted and asymmetrical coordination around
the Bi atom, due to presence of the lone pair, resulting in
non-centrosymmetric space group Im, leading to a permanent electrical dipole
moment and ferroelectric properties. On the other hand, magnetic
characterization reveals antiferromagnetic transitions, in agreement with the
isostructural compounds, thus evidencing two intrinsic properties that make
BiMnO a promising multiferroic material.Comment: 4 pages, 3 figure
AFS Pool Account Users - GSSKLOG and LCMAPS extension to support AFS users as EGEE pool account users
This paper describes the extensions to the gssklog and lcmaps packages that make possible the utilization of AFS users as LCMAPS/VOMS pool account users. This work has been performed in the framework of the integration of ENEA-GRID and EGEE infrastructure
The Gateway approach providing EGEE/GLITE access to non-standard architectures
This paper describes the gateway architecture and the required modifications to the gLite Middleware to make available to the GRID computing machines whose hardware/software architecture is non directly supported by gLite. This work has been performed in the framework of the integration of ENEA-GRID and EGEE infrastructure
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