Statistics – Computation
Scientific paper
Apr 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980nciml..27..472a&link_type=abstract
Nuovo Cimento, Lettere, Serie 2, vol. 27, Apr. 5, 1980, p. 472-474.
Statistics
Computation
2
Background Radiation, Cosmic Dust, Galactic Evolution, Astronomical Spectroscopy, Grains, Silicates
Scientific paper
The paper focuses on a comparison between the cosmic-background spectrum and the emission by a dust cloud of silicate grains. The similarity between the emission from a cloud of silicate grains and the observed cosmic-background spectrum is clearly shown schematically. However, for a quantitative comparison a more detailed computation is required. An expression is written for the observed cosmic-background spectrum in terms of the deceleration parameter, the grain extinction cross section, the number density of grains at the present epoch, and the rate of grain production in the pregalactic epoch /f(z)/. A complete analysis of the problem requires the computation of the optical depth for different values of f(z), for different grain materials, and for various distributions of grain radii. All these computations are reported by Aiello et al. (1979). The paper presents only preliminary results.
Aiello Santi
Cecchini Simone
Mandolesi Nazareno
Melchiorri Francesco
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