3-11 July 2007
Merida, Mexico
Mexico/General timezone
- icrc2007@icrc2007.unam.mx
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Plenaries 5
Place
Location: Merida, Mexico
Room: Gran Salon Yucatan (Fiesta Americana)
Date:
9 Jul 16:30 - 18:30
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Ongoing deep surveys of galaxy luminosity functions, spectral energy
distributions and backwards evolution models of star formation rates
can be used to calculate the past history of intergalactic photon
densities and, from them, the present and past optical depth of the
universe to gamma-rays. Stecker, Malkan & Scully have recently done
this calculation for pair-production in
... More
Presented by Dr. F. W. STECKER
on
9/7/2007
at
22:55
Despite the radical change of origin, the transition from galactic
to extragalactic cosmic rays (CR) is not well established and not
well understood. In principle three important characteristics of CR,
spectrum, chemical composition and anisotropy, must change at
energy of transition. The spectrum is naturally changing from steep
to flat component. The end of galactic CR is characterised
... More
Presented by Dr. Veniamin BEREZINSKY
on
9/7/2007
at
21:30
On December 16, 2004 Voyager 1 at 94 AU crossed the heliospheric termination
shock and began the exploration of the vast region of the heliosheath. At the
termination shock the observed intensity of anomalous cosmic rays > 4 MeV/n was
much below that expected at what was generally believed to be their acceleration site
while the galactic cosmic ray intensity (150-380 MeV/n He) was close to its
... More
Presented by Prof. Frank B. MCDONALD
on
9/7/2007
at
22:25