Astronomy and Astrophysics – Astrophysics
Scientific paper
Nov 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984afz....20..461k&link_type=abstract
(Astrofizika, vol. 20, Nov.-Dec. 1984, p. 461-474) Astrophysics (ISSN 0571-7132), vol. 20, no. 6, May 1985, p. 605-613. Translat
Astronomy and Astrophysics
Astrophysics
Cosmic Dust, Galactic Clusters, High Temperature Gases, Intergalactic Media, Radio Emission, Brightness Temperature, Radiant Flux Density
Scientific paper
The 0.04-50-cm emission of intergalactic dust grains (assumed to be similar to interstellar dust) in a spherically symmetrical cluster of galaxies (COG) is estimated theoretically, taking the Siuniaev-Zel'dovich effect and the thermal emission of intergalactic gas into account but neglecting the contribution of any discrete sources. Expressions for the brightness temperature and radiation intensity are derived, and the results of numerical computations of COGs in Com and Per are presented in tables and graphs. At the dust-grain concentrations employed (based on the observed reddening of the most distant galaxies in the COGs), it is predicted that the thermal emission of dust and gas cannot compensate for the Siuniaev-Zel'dovich effect in the cm wavelengths. In the mm and sub-mm ranges, dust should produce emission in excess of background, providing an observational test for the presence of dust.
Khersonskii V. K.
Voshchinnikov Nikolai V.
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