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CosPA 2013

Nov 12 – 15, 2013
Pagoda Hotel & Restaurant
Pacific/Honolulu timezone

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Session

Cosmic Ray I

Nov 13, 2013, 10:40 AM
C'est Si Bon (Pagoda Hotel & Restaurant)

C'est Si Bon

Pagoda Hotel & Restaurant

1525 Rycroft St. Honolulu, HI 96814

Description

Chair: Philip von Doetinchem (University of Hawai'i at Manoa)

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  1. 22. Astrophysical Origin of Positrons
    Prof. Sang Pyo Kim (Kunsan National University)
    11/13/13, 10:40 AM
    Cosmic Rays
    oral
    The recent observations of excess of high energy positrons by PAMELA and AMS-2 have raised an intriguing question of the origin of antimatter. Particle-antiparticle annihilation mechanism and astrophysical mechanism are most popular scenarios suggested so far. In this talk the astrophysical scenario, in particular QED aspect of compact stars, is critically studied and discussed. The...
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  2. 37. Light bending by a black body radiation
    Prof. Jin Young Kim (Kunsan National University)
    11/13/13, 11:05 AM
    Cosmic Rays
    oral
    We consider the shift of light velocity when the vacuum is non-trivial by electromagnetic radiation emitted from a black body. Within geometric optics formalism we calculate the bending angle of a light ray when there is a gradient in the energy density. Simplifying a neutron star as an isothermal black body, we estimate the order of magnitude for the bending angle and compared it with the...
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  3. 42. Primary Proton Flux measured by AMS-02
    Dr Cristina Consolandi (University of Hawaii Physics and Astronomy department)
    11/13/13, 11:30 AM
    Cosmic Rays
    oral
    The Alpha Magnetic Spectrometer (AMS-02) is a high energy particle detector designed to study origin and nature of cosmic rays up to a few TV from space. It was installed on the International Space Station (ISS) on May 19, 2011. During the first two years of operation AMS-02 performed precise measurements of the proton flux. In the low rigidity range, from 1 GV to 20 GV, the proton flux was...
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  4. 55. Photons signaling a phase transition in nuclear matter during neutron star mergers
    Dr Lance Labun (National Taiwan University)
    11/13/13, 11:55 AM
    Cosmic Rays
    oral
    Binary neutron star mergers are thought to be the engines of some short gamma ray bursts. We show that a merger creates conditions of sufficiently high density and temperature that a phase transition from nuclear to quark degrees of freedom may occur. For a signal of the transition, we study photons produced by the decay of collective modes of the quark plasma. These photons have a...
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