Diffuse Gamma-Ray Background from Star-Forming Galaxies

Details Diffuse Gamma-Ray Background from Star-Forming Galaxies Diffuse Gamma-Ray Background from Star-Forming Galaxies

Jan 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21723101f&link_type=abstract

American Astronomical Society, AAS Meeting #217, #231.01; Bulletin of the American Astronomical Society, Vol. 43, 2011

Mathematics

Logic

Scientific paper

The origin of the extragalactic gamma-ray background is a pressing cosmological mystery. The Fermi Gamma-Ray Space Telescope has recently measured the intensity and spectrum of this background; both are substantially different from previous measurements. We present a novel calculation of the gamma-ray background from normal star-forming galaxies. Contrary to longstanding expectations, we find that numerous but individually faint normal galaxies may comprise the bulk of the Fermi signal, rather than rare but intrinsically bright active galaxies. This result has wide-ranging implications, including: the possibility to probe the cosmic star-formation history with gamma rays; the ability to infer the cosmological evolution of cosmic rays and galactic magnetic fields; and an increased likelihood to identify subdominant components from rare sources (e.g., dark matter annihilation).

Affiliated with

Also associated with

No associations

Rating

Diffuse Gamma-Ray Background from Star-Forming Galaxies 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 Diffuse Gamma-Ray Background from Star-Forming Galaxies, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Diffuse Gamma-Ray Background from Star-Forming Galaxies will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1398091