A comparison of the cosmic microwave and cosmic X-ray backgrounds - Constraints on local sources of the fluctuations observed by COBE

Abstract

view Abstract Citations (17) References (12) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS A Comparison of the Cosmic Microwave and Cosmic X-Ray Backgrounds: Constraints on Local Sources of the Fluctuations Observed by COBE Boughn, S. P. ; Jahoda, K. Abstract It has been suggested by Hogan (1992) that the microwave background anisotropy detected by the COBE DMR experiment (Smoot et al. 1992) might be produced by inverse Compton scattering from hot diffuse clouds of electrons in nearby superclusters. If the COBE fluctuations are due to this mechanism, then the absence of anticorrelations between maps of the cosmic microwave and cosmic X-ray backgrounds constrains the temperature (kT_e_ > 16 keV) and density (n_e_ < 2 x 10^-6^ cm^-3^) of the ionized supercluster gas. Since the COBE limits on spectral distortion indicate that the temperature of the intergalactic medium is less than 10 keV, we conclude that the fluctuations observed by COBE are probably not produced by this mechanism. Publication: The Astrophysical Journal Pub Date: July 1993 DOI: 10.1086/186925 Bibcode: 1993ApJ...412L...1B Keywords: Background Radiation; Cosmic X Rays; Interstellar Gas; Microwaves; Anisotropy; Astronomical Maps; Compton Effect; Cosmic Background Explorer Satellite; Space Radiation; COSMOLOGY: COSMIC MICROWAVE BACKGROUND; GALAXIES: INTERGALACTIC MEDIUM; COSMOLOGY: OBSERVATIONS; X-RAYS: GENERAL full text sources ADS |