Astronomy and Astrophysics – Astrophysics – High Energy Astrophysical Phenomena
Scientific paper
2009-07-02
Astronomy and Astrophysics
Astrophysics
High Energy Astrophysical Phenomena
4 pages, 2 figures, contribution on behalf of the Fermi LAT collaboration to the 31st ICRC
Scientific paper
The diffuse Galactic gamma-ray emission is produced by cosmic rays (CRs) interacting with the interstellar gas and radiation field. Measurements by the Energetic Gamma-Ray Experiment Telescope (EGRET) instrument on the Compton Gamma-Ray Observatory indicated excess gamma-ray emission > 1 GeV relative to diffuse Galactic gamma-ray emission models consistent with directly measured CR spectra (the so-called ``EGRET GeV excess''). The excess emission was observed in all directions on the sky, and a variety of explanations have been proposed, including beyond-the-Standard-Model scenarios like annihilating or decaying dark matter. The Large Area Telescope (LAT) instrument on the Fermi Gamma-ray Space Telescope has measured the diffuse gamma-ray emission with unprecedented sensitivity and resolution. We report on LAT measurements of the diffuse gamma-ray emission for energies 100 MeV to 10 GeV and Galactic latitudes 10 deg. <= |b| <= 20 deg. The LAT spectrum for this region of the sky is well reproduced by the diffuse Galactic gamma-ray emission models mentioned above and inconsistent with the EGRET GeV excess.
for the Fermi LAT Collaboration
Porter Troy A.
No associations
LandOfFree
Fermi LAT Measurements of the Diffuse Gamma-Ray Emission at Intermediate Galactic Latitudes 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 Fermi LAT Measurements of the Diffuse Gamma-Ray Emission at Intermediate Galactic Latitudes, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fermi LAT Measurements of the Diffuse Gamma-Ray Emission at Intermediate Galactic Latitudes will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-730697