Intergalactic dust

Details Intergalactic dust Intergalactic dust

Oct 1974

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1974mnras.169p..19n&link_type=abstract

Monthly Notices of the Royal Astronomical Society, vol. 169, Oct. 1974, p. 19P-26P.

Astronomy and Astrophysics

Astronomy

14

Cosmic Dust, Intergalactic Media, Interstellar Extinction, Quasars, Red Shift, Colorimetry, Continuous Radiation, Emission Spectra, Galactic Clusters, Galactic Evolution, Luminous Intensity

Scientific paper

The obscuration of extragalactic objects by intergalactic dust has been calculated as a function of redshift for three received frequencies assuming that the dust particles obey the typical interstellar extinction law. The effect of the 2200 A feature, characteristic of interstellar extinction, is to produce board maxima in the resulting intergalactic reddening vs redshift curves. The redshift variation of the colours of quasars, corrected for emission lines and galactic reddening, cannot be explained by luminosity evolution but can be interpreted in terms of reddening by intergalactic dust whose extinction properties show the ultraviolet peak near 2200 A. An upper limit of the mass density of this dust has been estimated.

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