Constraints on the cosmic rays in the Small Magellanic Cloud

Details Constraints on the cosmic rays in the Small Magellanic Cloud Constraints on the cosmic rays in the Small Magellanic Cloud

Jan 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993phrvl..70..127s&link_type=abstract

Physical Review Letters (ISSN 0031-9007), vol. 70, no. 2, p. 127-129.

Astronomy and Astrophysics

Astronomy

66

Electron Scattering, Galactic Cosmic Rays, Gamma Rays, Magellanic Clouds, Astronomical Observatories, Constraints, Milky Way Galaxy, Radio Galaxies

Scientific paper

Observations of the SMC using the Energetic Gamma Ray Experimental Telescope (EGRET) on the Compton Observatory are reported. The findings yield an upper limit for gamma-ray emission above 100 MeV of 0.5 x 10 exp -7 photon/sq cm s. The expected flux if the cosmic rays (CR) are universal rather than Galactic in origin is (2.4 +/- 0.5) x 10 exp -7 photon/sq cm s, only a third of which arises from cosmic ray electron interactions. Thus, the bulk of the CR energy density is almost certainly neither metagalactic nor universal, but Galactic in origin. The results add to the evidence that the SMC is in a nonequilibrium state and indicate that the LMC is most likely in quasi-stable equilibrium, with a CR energy density near the maximum that can be contained.

Affiliated with

Also associated with

No associations

Rating

Constraints on the cosmic rays in the Small Magellanic Cloud does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Constraints on the cosmic rays in the Small Magellanic Cloud, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Constraints on the cosmic rays in the Small Magellanic Cloud will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1264764