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Title: Diffuse gamm-ray Emission: Lessons and Perspectives

Abstract

The Galactic diffuse emission is potentially able to reveal much about the sources and propagation of cosmic rays (CR), their spectra and intensities in distant locations. It can possibly unveil WIMP dark matter (DM) through its annihilation signatures. The extragalactic background may provide vital information about the early stages of the universe, neutralino annihilation, and unresolved sources (blazars) and their cosmological evolution. The g-ray instrument EGRET on the CGRO contributed much to the exploration of the Galactic diffuse emission. The new NASA Gamma-ray Large Area Space Telescope (GLAST) is scheduled for launch in 2007; study of the diffuse g-ray emission is one of the priority goals. We describe current understanding of the diffuse emission and its potential for future discoveries.

Authors:
; ; ;
Publication Date:
Research Org.:
Stanford Linear Accelerator Center (SLAC)
Sponsoring Org.:
USDOE
OSTI Identifier:
902730
Report Number(s):
SLAC-PUB-12465
astro-ph/0509414; TRN: US200719%%116
DOE Contract Number:
AC02-76SF00515
Resource Type:
Conference
Resource Relation:
Journal Name: AIP Conf.Proc.801:57-62,2005; Conference: Talk given at Conference on Astrophysical Sources of High Energy Particles and Radiation, Torun, Poland, 20-24 Jun 2005
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; GALAXIES; COSMIC GAMMA SOURCES; BACKGROUND RADIATION; NONLUMINOUS MATTER; ASTROPHYSICS; Astrophysics,ASTRO

Citation Formats

Moskalenko, Igor V., /NASA, Goddard, Strong, Andrew W., and /Garching, Max Planck Inst., MPE. Diffuse gamm-ray Emission: Lessons and Perspectives. United States: N. p., 2007. Web.
Moskalenko, Igor V., /NASA, Goddard, Strong, Andrew W., & /Garching, Max Planck Inst., MPE. Diffuse gamm-ray Emission: Lessons and Perspectives. United States.
Moskalenko, Igor V., /NASA, Goddard, Strong, Andrew W., and /Garching, Max Planck Inst., MPE. Wed . "Diffuse gamm-ray Emission: Lessons and Perspectives". United States. doi:. https://www.osti.gov/servlets/purl/902730.
@article{osti_902730,
title = {Diffuse gamm-ray Emission: Lessons and Perspectives},
author = {Moskalenko, Igor V. and /NASA, Goddard and Strong, Andrew W. and /Garching, Max Planck Inst., MPE},
abstractNote = {The Galactic diffuse emission is potentially able to reveal much about the sources and propagation of cosmic rays (CR), their spectra and intensities in distant locations. It can possibly unveil WIMP dark matter (DM) through its annihilation signatures. The extragalactic background may provide vital information about the early stages of the universe, neutralino annihilation, and unresolved sources (blazars) and their cosmological evolution. The g-ray instrument EGRET on the CGRO contributed much to the exploration of the Galactic diffuse emission. The new NASA Gamma-ray Large Area Space Telescope (GLAST) is scheduled for launch in 2007; study of the diffuse g-ray emission is one of the priority goals. We describe current understanding of the diffuse emission and its potential for future discoveries.},
doi = {},
journal = {AIP Conf.Proc.801:57-62,2005},
number = ,
volume = ,
place = {United States},
year = {Wed Apr 25 00:00:00 EDT 2007},
month = {Wed Apr 25 00:00:00 EDT 2007}
}

Conference:
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  • The Galactic diffuse emission is potentially able to reveal much about the sources and propagation of cosmic rays (CR), their spectra and intensities in distant locations. It can possibly unveil WIMP dark matter (DM) through its annihilation signatures. The extragalactic background may provide vital information about the early stages of the universe, neutralino annihilation, and unresolved sources (blazars?) and their cosmological evolution. The {gamma}-ray instrument EGRET on the CGRO contributed much to the exploration of the Galactic diffuse emission. The new NASA Gamma-ray Large Area Space Telescope (GLAST) is scheduled for launch in 2007; study of the diffuse {gamma}-ray emissionmore » is one of the priority goals. We describe current understanding of the diffuse emission and its potential for future discoveries.« less
  • We discuss uncertainties and possible sources of errors associated with the determination of the diffuse Galactic {gamma}-ray emission using the EGRET data. Most of the issues will be relevant also in the GLAST era. The focus here is on issues that impact evaluation of dark matter annihilation signals against the diffuse {gamma}-ray emission of the Milky Way.
  • Diffuse emission from the Milky Way dominates the gamma-ray sky. About 80% of the high-energy luminosity of the Milky Way comes from processes in the interstellar medium. The Galactic diffuse emission traces interactions of energetic particles, primarily protons and electrons, with the interstellar gas and radiation field, thus delivering information about cosmic-ray spectra and interstellar mass in distant locations. Additionally, the Galactic diffuse emission is the celestial foreground for the study of gamma-ray point sources and the extragalactic diffuse gamma-ray emission. We will report on the latest developments in the modeling of the Galactic diffuse emission, which will be usedmore » for the Gamma Ray Large Area Space Telescope (GLAST) investigations.« less
  • Abstract not provided.