1998/11/25 by Andrzej M. Soltan, A. Sołtan, Soltan, Andrzej M. +3
Engineering · Physics and Astronomy · #Astronomical Observations and Instrumentation #Astrophysics (astro-ph) #Astrophysics and Cosmic Phenomena #FOS: Physical sciences #Gamma-ray bursts and supernovae #astro-ph
paper · pdf · doi:10.48550/arxiv.astro-ph/9811405
4 pages, 1 figure, epsfig.sty - included, "The Extreme Universe" - 3rd INTEGRAL Workshop
arxiv created 1998/11/25 · openalex publication_date 1998/11/25 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Contribution to the gamma-ray background (GRB) by galaxies bright in the far-IR (FIR) is discussed. Using observational correlations between the FIR and synchrotron emission in radio wavelengths, it is shown that the concentration of cosmic ray electrons in FIR luminous galaxies is substantially higher than in the general population of galaxies. Microwave background and intrinsic galaxy radiation scattered via the inverse Compton (IC) effect by cosmic ray electrons into high energies makes the FIR galaxies relatively strong gamma-ray sources (in comparison with normal galaxies).x Using the FIR galaxy luminosity function and the relationship between FIR and radio luminosities, the contribution (due to the IC only) of FIR luminous galaxies to the GRB above ~ 1 MeV is estimated at 10 to 25 % depending on the rate of cosmic evolution of star burst galaxies. This is substantially larger than the normal galaxies contribution. To obtain more accurate assessment of relationship between the GRB and FIR galaxies, gamma-ray observations of individual galaxies bright in the FIR are required.