High Energy Cosmic-Ray Electrons Beyond 100 GeV

Details High Energy Cosmic-Ray Electrons Beyond 100 GeV High Energy Cosmic-Ray Electrons Beyond 100 GeV

Aug 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999icrc....3...61k&link_type=abstract

Proceedings of the 26th International Cosmic Ray Conference. August 17-25, 1999. Salt Lake City, Utah, USA. Under the auspices o

Physics

Scientific paper

We report and discuss the new measurements of high energy electrons observed with emulsion chambers exposed by balloons in 1996 and 1998. By the improvement of the sensitivity of X-ray lms, it is now possible to detect the electron showers down to 300GeV by naked eye scanning. The statistical precision of electron sp ectrum beyond a few hundred GeV was much improved. As to the contribution of nearby sources at high energy electron spectrum, the latest estimate of the distance of 250pc to Vela, which is much smaller than the previous estimate of 500p c, leads to a possible significant contribution of Vela to the observed electrons in TeV region. The astrophysical significance of this consequence is presented.

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