Computer Science – Numerical Analysis
Scientific paper
Sep 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993ap%26ss.207...17l&link_type=abstract
Astrophysics and Space Science (ISSN 0004-640X), vol. 207, no. 1, p. 17-26
Computer Science
Numerical Analysis
3
Background Radiation, Big Bang Cosmology, Infrared Absorption, Intergalactic Media, Radio Attenuation, Relic Radiation, Cosmic Background Explorer Satellite, Infrared Astronomy Satellite, Numerical Analysis, Spiral Galaxies, Stellar Luminosity
Scientific paper
The conventional interpretation of the cosmic background radiation (CBR) as a relic of the Big Bang assumes that the intergalactic medium (IGM) is highly transparent to radio frequency radiation. Previous work (Lerner, 1990) used the well-known correlation of IR and radio luminosities of spiral galaxies to test this assumption. That analysis, using 237 Shapley-Ames galaxies showed that radio luminosity (LR) for a given IR-luminosity, declines with distance, implying that the IGM strongly absorbs radio frequency radiation. That absorption has now been confirmed using a sample of 301 IR-bright galaxies. Using two independent methods of determining the correlation of IR and radio luminosities of spiral and interacting galaxies, the sample shows that for a given LIR, LR approximates to D-0.32 +/- 0.04 over a range of distances from 0.7-300 Mpc. (H0 = 75 km/s/Mpc). The correlation is significant at the 8 sigma or 10-14 level. Absorption by the IGM is the only reasonable explanation for this correlation. The existence of such absorption implies that neither the isotropy nor the spectrum of the CBR are primordial and that neither is evidence for a Big Bang.
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