Computer Science
Scientific paper
Jan 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000stin...0050368w&link_type=abstract
Technical Report, Space Telescope Science Inst. Baltimore, MD United States
Computer Science
Gamma Rays, Emission Spectra, Observation, Wind Effects, Heat Transmission, Hot Stars, X Ray Sources, B Stars, Background Radiation, Cygnus Constellation, Gamma Ray Observatory, Gamma Ray Telescopes, Interpolation, Massive Stars, O Stars, Radio Telescopes, Star Clusters, Synchrotron Radiation
Scientific paper
The purpose of this proposal was to search for gamma-ray emission from the winds of hot, massive stars. According to our theoretical calculations, shocks in the winds of massive stars accelerate particles to high energies. The high-energy particles emit synchrotron radio emission (observed by ground-based radio telescopes) and high-energy gamma-ray emission that we predicted should be detectable by the EGRET instrument on the Compton Gamma Ray Observatory between 100 MeV and a few GeV. We obtained EGRET from phases 1, 2, and 3 of the Cygnus OB2 association, a cluster of massive, young stars, to search for this gamma-ray emission. The data products and analysis show a source consistent with the position of Cyg OB2 with approximately the predicted count rate and spectrum.
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