Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990a%26a...227....6v&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 227, no. 1, Jan. 1990, p. 6-10.
Astronomy and Astrophysics
Astronomy
5
Far Infrared Radiation, Galactic Structure, Lenticular Bodies, Spiral Galaxies, Astronomical Catalogs, Cosmic Dust, Infrared Astronomy Satellite, Star Formation
Scientific paper
The far-infrared properties of an optically complete statistical sample of lenticular galaxies from the Revised Shapley-Ames Catalog of Bright Galaxies were analyzed using co-added IRAS observations. The sample consists of 32 S0(1), 6 S0(2), and 11 S0(3) galaxies, a sequence indicating the presence of optical dust lanes. The analysis is restricted to a sample of 27 optically nonpeculiar S0 galaxies brighter than B(T) = 12.5, with a flux density limit of 0.25 Jy at 60 microns and 0.68 Jy at 100 microns. No significant difference is found between the 100 and 60 microns flux density ratios (a function of dust temperature) of the detected S0(1) and S0(3) galaxies, a slightly higher far-infrared-to-blue luminosity ratio for the S0(3) galaxies, and a 5 times higher global dust content for the S0(3)s, which show faint optical dust arcs. The observed difference in dust content suggests that the face-on extinction correction amounts to about 0.2 and 0.8 mag in S0(1) and S0(3) galaxies, respectively, consistent with optical estimates.
de Jong Teije
Driel Wim van
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