Computer Science
Scientific paper
Sep 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001esasp.459..153v&link_type=abstract
In: Exploring the gamma-ray universe. Proceedings of the Fourth INTEGRAL Workshop, 4-8 September 2000, Alicante, Spain. Editor:
Computer Science
2
X-Ray Background, Gamma-Ray Background, Galaxy
Scientific paper
We present measurements of the Galactic background radiation in the wide energy bandpass 0.5-1000 keV. We show that in the hard X-ray/soft γ-ray band, a significant portion of the emission is due to discrete sources. The remaining unresolved emission may be either interpreted as truly diffuse processes or the superposition of discrete sources that have very hard spectra. Here, we show that the unresolved emission may be interpreted as nonthermal emission from the interaction of suprathermal electrons with the ambient interstellar medium. The suprathermal electrons may be accelerated in supernova explosions or by ambient interstellar plasma turbulence. This interpretation has the complex X-ray line spectrum of the background emission below 10 keV and the unresolved emission above 10 keV. Our interpretation is based on measurements taken with ASCA, RXTE and OSSE. Future observations with XMM and INTEGRAL will provide further evidence for the orign of the emission.
Tatischeff Vincent
Valinia Azita
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