Isotropic Gamma-Ray Background: Cosmic-Ray Induced Albedo from Debris in the Solar System?

@article{Moskalenko2009IsotropicGB,
  title={Isotropic Gamma-Ray Background: Cosmic-Ray Induced Albedo from Debris in the Solar System?},
  author={Igor V. Moskalenko and Troy A. Porter},
  journal={arXiv: High Energy Astrophysical Phenomena},
  year={2009}
}
We calculate the gamma-ray albedo due to cosmic-ray interactions with debris (small rocks, dust, and grains) in the Oort Cloud. We show that under reasonable assumptions a significant proportion of what is called the "extragalactic gamma-ray background" could be produced at the outer frontier of the solar system and may be detectable by the Large Area Telescope, the primary instrument on the Fermi Gamma-Ray Space Telescope. If detected it could provide unique direct information about the total… Expand

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References

SHOWING 1-10 OF 44 REFERENCES
A Celestial Gamma-Ray Foreground Due to the Albedo of Small Solar System Bodies and a Remote Probe of the Interstellar Cosmic-Ray Spectrum
We calculate the γ-ray albedo flux from cosmic-ray (CR) interactions with the solid rock and ice in Main Belt asteroids (MBAs), Jovian and Neptunian Trojan asteroids, and Kuiper Belt objects (KBOs)Expand
The Gamma-ray Albedo of the Moon
We use the GEANT4 Monte Carlo framework to calculate the γ-ray albedo of the Moon due to interactions of cosmic-ray (CR) nuclei with moon rock. Our calculation of the albedo spectrum agrees with theExpand
Cosmic gamma-ray background from structure formation in the intergalactic medium
TLDR
It is shown that the shock waves induced by gravity in the gas of the intergalactic medium, during the formation of large-scale structures like filaments and sheets of galaxies, produce a population of highly relativistic electrons that scatter a small fraction of the cosmic microwave background photons in the local Universe up to gamma-ray energies, thereby providing the Gamma-ray background. Expand
Gamma-ray emission from the solar halo and disk: a study with EGRET data
Context. The Sun has recently been predicted to be an extended source of gamma-ray emission, produced by inverse-Compton (IC) scattering of cosmic-ray (CR) electrons on the solar radiation field. TheExpand
Energetic gamma ray experiment telescope high-energy gamma ray observations of the Moon and quiet Sun
High-energy gamma radiation has been seen from the Moon as it passed through the large field of view of the energetic gamma ray experiment telescope (EGRET) on the Compton Gamma Ray Observatory aExpand
Inverse Compton Scattering on Solar Photons, Heliospheric Modulation, and Neutrino Astrophysics
We study the inverse Compton scattering of solar photons by Galactic cosmic-ray electrons. We show that the γ-ray emission from this process is substantial, with the maximum flux in the direction ofExpand
Gamma rays from halos around stars and the Sun
Abstract Inverse Compton (IC) scattering by relativistic electrons produces a major component of the diffuse emission from the Galaxy. The photon fields involved are the cosmic microwave backgroundExpand
The Guaranteed Gamma-Ray Background
The diffuse extragalactic gamma-ray background (EGRB) above 100 MeV encodes unique information about high-energy processes in the universe. Numerous sources for the EGRB have been proposed, but theExpand
Cosmic γ-ray background from structure formation in the intergalactic medium
The Universe is filled with a diffuse background of γ-ray radiation, the origin of which remains one of the unsolved puzzles of cosmology. Less than one-quarter of the γ-ray flux can be attributed toExpand
The Luminosity Function of the EGRET Gamma-Ray Blazars
We examine the properties of the gamma-ray active galactic nuclei (AGNs) detected by EGRET. We calculate the evolution and luminosity function of the gamma-ray-loud AGNs, and we estimate theExpand
...
1
2
3
4
5
...