Iras-allsky

Studies of IRAS sources at high galactic latitudes - III. Luminosity functions at 25, 60 and 100 mu.m and the correlation of optical and infrared luminosities.

August 1987 • 1987MNRAS.227..589R

Authors • Rowan-Robinson, M. • Helou, G. • Walker, D.

Abstract • Luminosity functions at 25, 60 and 100 microns for IRAS sources with galaxies brighter than 14.5 mag at b of greater than 60 deg are presented, together with simple model fits which are consistent with the observed source counts. Only the 60- and 100-micron luminosities are well correlated with the corrected absolute magnitude, and the ratio of the far-infrared luminosity to the optical luminosity is clearly correlated with 100/60-micron color, behavior which is consistent with a mixture of a normal disk component and a starburst component. Results indicate that the adopted internal extinction correction is a good approximation. The present optical luminosity functions are consistent with the Gaussian form for Virgo spirals adopted by Sandage et al. (1985).

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George Helou

IPAC Executive Director