The effect of inclination-dependent selection on IRAS galaxy detection rates

Abstract

view Abstract Citations (1) References (12) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS The Effect of Inclination-dependent Selection on IRAS Galaxy Detection Rates Connolly, A. J. ; Joseph, R. D. ; James, P. A. Abstract We have investigated the suggestion by Burstein and Lebofsky that Sc spiral galaxies are optically thick at 100 microns, when viewed edge- on. Having examined the inclination dependence of the 100 micron surface brightness and 100 to 60 micron color for a sample of UGC Sc spirals, we find no evidence to support large optical depth at 100 microns. By comparing the inclination distribution of these Sc spirals with a random distribution, we find an excess of edge-on [log (a/b) > 0.7] spirals. We interpret this as a systematic misclassification of edge-on spirals as Sc and an increase in diameter with inclination in the UGC. We therefore conclude that there is no evidence to support the notion that edge-on Sc galaxies are optically thick at 100 micron. Publication: The Astrophysical Journal Pub Date: March 1991 DOI: 10.1086/169798 Bibcode: 1991ApJ...370..140C Keywords: Galactic Structure; Infrared Sources (Astronomy); Spaceborne Astronomy; Spiral Galaxies; Brightness Distribution; Infrared Astronomy Satellite; Optical Thickness; Astrophysics; GALAXIES: STRUCTURE; INFRARED: SOURCES full text sources ADS |