TITLE

Diffuse galactic continuum gamma rays

AUTHOR(S)
Strong, Andrew W.; Moskalenko, Igor V.; Reimer, Olaf
PUB. DATE
April 2000
SOURCE
AIP Conference Proceedings;2000, Vol. 510 Issue 1, p283
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Galactic diffuse continuum γ-ray emission is intricately related to cosmic-ray physics and radio astronomy. We describe recent results from an approach which endeavours to take advantage of this. Information from cosmic-ray composition constrains the propagation of cosmic rays; this in turn can be used as input for γ-ray models. The GeV γ-ray excess cannot be explained as π°-decay resulting from a hard nucleon spectrum without violating antiproton and positron data; the best explanation at present appears to be inverse-Compton emission from a hard interstellar electron spectrum. One consequence is an increased importance of Galactic inverse Compton for estimates of the extragalactic background. At low energies, an additional point-source component of γ-rays seems to be necessary. © 2000 American Institute of Physics.
ACCESSION #
6029790

 

Related Articles

  • The γ-ray and cosmic ray connection: Ulysses HET secondary radioisotope measurements and cosmic ray propagation. Connell, J. J.; Simpson, J. A. // AIP Conference Proceedings;2000, Vol. 510 Issue 1, p296 

    Cosmic rays constitute a super-thermal gas of charged particles magnetically confined within the Galaxy. Cosmic ray nuclei and electrons are a principal source of the diffuse γ-ray background in the Galaxy. Thus, understanding diffuse γ-ray production is directly related to understanding...

  • The origin of cosmic rays: What can GLAST say? Ormes, Jonathan F.; Digel, Seth; Moskalenko, Igor V.; Moiseev, Alexander; Williamson, Roger // AIP Conference Proceedings;2000, Vol. 528 Issue 1, p445 

    Gamma rays in the band from 30 MeV to 300 GeV, used in combination with direct measurements and with data from radio and X-ray bands, provide a powerful tool for studying the origin of Galactic cosmic rays. Gamma-ray Large Area Space Telescope (GLAST) with its fine 10-20 arcmin angular...

  • Paleoastrophysics: progress and prospects. Kocharov, G. E. // Technical Physics;Sep99, Vol. 44 Issue 9, p1081 

    Results of highly accurate measurements of the radiocarbon concentration in the annual growth rings of trees over the last 400 years are presented. The temporal behavior of the intensity of galactic cosmic rays is reconstructed for the first time for the periods before, during, and after a deep...

  • SNR and fluctuations in the diffuse Galactic γ-ray continuum. Strong, A. W.; Moskalenko, I. V. // AIP Conference Proceedings;2001, Vol. 587 Issue 1, p533 

    In studies of cosmic-ray propagation and diffuse continuum γ-ray emission from the Galaxy it has usually been assumed that the source function can be taken as smooth and time-independent, an approximation justified by the long residence time of cosmic-rays in the Galaxy. However, especially...

  • Excess GeV radiation and cosmic ray origin. Bu¨sching, Ingo; Pohl, Martin; Schlickeiser, Reinhard // AIP Conference Proceedings;2001, Vol. 587 Issue 1, p469 

    Particle acceleration at supernova remnant (SNR) shock waves is regarded as the most probable mechanism for providing Galactic cosmic rays at energies below 10[SUP15] eV. The Galactic cosmic ray hadron component would in this picture result from the injection of relativistic particles from many...

  • A multiple γ-ray source associated with a new supernova remnant. Combi, Jorge A.; Romero, Gustavo E.; Benaglia, Paula; Jonas, Justin L. // AIP Conference Proceedings;2000, Vol. 510 Issue 1, p69 

    Only a few of the 170 unidentified EGRET sources cluster within small regions of less than 6° in the sky. Here we present observational evidence supporting the association of such a group of three neighboring γ-ray sources (3EG J1834-2803, 3EG J1847-3219, and 3EG J1850-2652) with a new...

  • Extragalactic gamma-ray emission: CGRO results. Sreekumar, P. // AIP Conference Proceedings;2000, Vol. 510 Issue 1, p459 

    The first all-sky survey above 1 MeV by the COMPTEL and EGRET instruments on board the Compton Gamma Ray Observatory has provided new results on the extragalactic diffuse emission. The extragalactic emission over the energy range 1 MeV–100 GeV is well described by a broken power law...

  • Region of enhanced flux of cosmic rays with PeV energies toward the pulsars PSR J1840+5640 and LAT PSR J1836+5925. Zotov, M. Yu; Kulikov, G. V. // Astronomy Letters;Sep2010, Vol. 36 Issue 9, p645 

    nalysis of the arrival directions of extensive air showers (EASs) detected on the EAS MSU array and the prototype of the EAS-1000 array has revealed a region of enhanced flux of cosmic rays with PeV energies toward the pulsars PSR J1840+5640 and LAT PSR J1836+5925 at a confidence level up to 4.5...

  • Large Area Telescope On-Orbit Calibration and Configuration. Charles, E.; Borgland, A. // AIP Conference Proceedings;2007, Vol. 921 Issue 1, p542 

    The Large Area Telescope (LAT) is one of the two science instruments on-board the Gamma ray Large Area Space Telescope (GLAST). The LAT contains over 846K channels in the silicon tracker, 1536 CsI crystals in the Calorimeter and 97 tile and ribbons in the Anti-coincidence Detector. Here we...

Share

Read the Article

Courtesy of VIRGINIA BEACH PUBLIC LIBRARY AND SYSTEM

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics