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Roma International Conference on Astroparticle Physics

25–27 May 2011
Rettorato, University Roma TRE, Roma, Italy
Europe/Rome timezone
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Poster Session

25 May 2011, 18:30
Rettorato, University Roma TRE, Roma, Italy

Rettorato, University Roma TRE, Roma, Italy

Viale Ostiense 159 00148, Roma Italy Room: Aula Magna

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Poster Session 1

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  1. 31. "Observation of Horizontal Extensive Air Showers with the ARGO-YBJ experiment"
    Dr Beatrice Panico (Universita' Roma Tor Vergata - INFN Roma Tor Vergata)
    25/05/2011, 18:30
    The observation of Extensive Air Showers with zenith angle greater than 80 deg with the ARGO-YBJ experiment is described. The measurement of the size spectrum, angular (zenithal and azimuthal) and time distributions of horizontal events is reported. A description of their space-time topological phenomenology is also provided.
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  2. 38. Atmospheric muon Neutrino backgroung suppressions at 20 GeV opening to a new Astronomy
    Prof. Daniele Fargion (ROMA1)
    25/05/2011, 18:30
    At twenty GeV upward atmospheric neutrino are suppressed (above a factor ten) offering a quite energy windows to look for upward galactic and extragalactic neutrino sources. We did estimated the present Deep Core and possibly future Pingu neutrino detectors spectra for atmospheric background in the tens GeV range taking care of known flavor (muon-tau) mixing signature and eventual...
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  3. 109. Electron muon identification in a new concept of an EAS detector
    Maurizio Iori (ROMA1)
    25/05/2011, 18:30
    M. Iori, E. Arslan,H. Denizli,M. Kaya,J. Russ,A. Yilmaz Sapienza'' University of Rome, Italy Carnegie-Mellon University, Pittsburgh USA Abant Izzet Baysal University TK University of Kafkas TK We present results demonstrating the time resolution and muon-electron separation capabilities with a new concept of an EAS detector capable for measurements of cosmic rays arriving with large...
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  4. 82. Laboratory Tests of the Hard X-ray Polarimeter X-Calibur
    Dr Matthias Beilicke (Washington University in St.Louis)
    25/05/2011, 18:30
    X-ray polarimetry promises to give qualitatively new information about high-energy sources, such as binary black hole systems, rotation and accretion powered neutron stars, Microquasars, Active Galactic Nuclei and Gamma-Ray Bursts. Furthermore, hard X-ray polarimetric observations of galactic sources can place uniquely sensitive constrains on Lorentz Invariance violations. We designed, built...
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  5. 90. Observation of Markarian 180 at the Fermi LAT energies
    Dr Cristina Sbarra (INFN-PD & Bologna University)
    25/05/2011, 18:30
    We present the results of the analysis of Markarian 180 (1ES 1133+704), a BL Lac object embedded in a giant elliptical galaxy, obtained for a period of 45 days, during which multiwavelenght observations were on going. The Mrk 180 is associated to a quasar- like object whose distance can be determined unambiguously, thanks to the well done measurement of absorption line that gives the redshift...
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  6. 103. On the extragalactic jet asymmetry and composition and the production of high energy cosmic rays
    Dr Nectaria Gizani (HOU)
    25/05/2011, 18:30
    We probe the role of the directional asymmetry between relativistic outflows to kilo-parsec scale jets, in the acceleration of cosmic rays. Our sample contains powerful AGN hosting dense cluster environments where the magnetic field decreases with the distance from the centre. We have mapped the internal magnetic field to the source and the cluster magnetic field in detail using radio and...
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  7. 100. Probing General Relativity and New Physics with Lunar Laser Ranging
    Dr Mauro Maiello (LNF)
    25/05/2011, 18:30
    Over the past 40 years, Lunar Laser Ranging (LLR) to the Apollo Cube Corner Retroreflector (CCR) Arrays have supplied almost all the significant tests of General Relativity. LLR can evaluate the PPN (Post Newtonian Parameters), addressing this way both the possible changes in the gravitational constant and the self-energy properties of the gravitational field. In addition, the LLR has provided...
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  8. 73. Quark-gluon plasma in cosmic ray experiments
    Prof. Anatoly Petrukhin (NRNU MEPhI)
    25/05/2011, 18:30
    Possibilities of observation of new particles or states of matter in cosmic ray experiments at very high energies (above 1015 eV) always gave rise to doubts, especially among accelerator physicists. Nevertheless, attempts of explanation of various unusual phenomena detected in cosmic rays periodically appear. The first of them was an explanation of the knee appearance due to hadron interaction...
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  9. 104. Radio extended regions in AGN and their connection with cosmic rays
    Dr Nectaria Gizani (HOU)
    25/05/2011, 18:30
    We study whether radio relics, halos and mini-halos contribute in the acceleration of cosmic rays. These extended structures are not associated with the AGN phenomenon. AGN can produce particle bubbles of non-thermal emission, which can restrict cosmic rays. Radio relics and (mini) halos could be forming as a result of the confinement of cosmic rays by these bubbles. For our study we use...
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  10. 94. Young SNRs: a new class of GeV Emitters
    Dr Francesco Giordano (BA)
    25/05/2011, 18:30
    Fermi-LAT has recently detected a new class of of GeV emitters: Young SNRs. A review of Tycho, VelaJr, RXJ1713 and CasA will be given hilighlithing possible interpretation of the observed spectrum as emitted by hadrons accelereted in the SNR sites. Differences with older SNR mostly interacting with Molecular Clouds will be also discussed.
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