3-11 July 2007
Merida, Mexico
Mexico/General timezone
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Plenaries 5

Place

Location: Merida, Mexico
Room: Gran Salon Yucatan (Fiesta Americana)
Date: 9 Jul 16:30 - 18:30

Timetable | Contribution List

Displaying 3 contributions out of 3
Type: Oral Session: Plenaries 5
Track: Special
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
Type: Oral Session: Plenaries 5
Track: Special
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
Type: Oral Session: Plenaries 5
Track: Special
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
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