Radio absorption by the intergalactic medium

Details Radio absorption by the intergalactic medium Radio absorption by the intergalactic medium

Sep 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...361...63l&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 361, Sept. 20, 1990, p. 63-68.

Astronomy and Astrophysics

Astronomy

6

Intergalactic Media, Microwave Attenuation, Radiation Absorption, Infrared Sources (Astronomy), Luminosity, Relic Radiation, Spiral Galaxies

Scientific paper

The IR-radio correlation for spiral galaxies has been used to measure the absorption of 1.49-GHz radiation by the intergalactic medium. Contrary to conventional expectation, a sample of 237 galaxies shows a strong inverse correlation of radio luminosity (at a given IR luminosity) with distance, Lr = about D exp -0.4, over a range of distances from 0.7-55 Mpc. Strong absorption by the intergalactic medium is the only reasonable explanation of this correlation, which is statistically significant at the 2 x 10 to the -12th level.

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