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1998ApJ...499..670B - Astrophys. J., 499, 670-676 (1998/June-1)
Far-infrared emission from E and E/S0 galaxies.
BREGMAN J.N., SNIDER B.A., GREGO L. and COX C.V.
Abstract (from CDS):
These detections define the upper envelope of the optical to far-infrared relationship, Ffir∝F0.24±0.08B, showing that optically bright objects are also brighter in the infrared, although with considerable dispersion. A luminosity correlation is present wth Lfir∝L1.65±0.28B, but the dust temperature is uncorrelated with luminosity. The dust masses inferred from the far-infrared measurements are 1 order of magnitude greater than those from extinction observations, except for the recent merger candidate NGC 4125, where they are equal. We suggest that the ratio of the far-infrared dust mass to the extinction dust mass may be an indicator of the time since the last spiral-spiral merger.
These results are compared to the model in which most of the dust comes from stellar mass loss and the heating is primarily by stellar photons. Models that contain large dust grains composed of amorphous carbon plus silicates come close to reproducing the typical 60-100 µm flux ratios, the far-infrared luminosity, and the Lfir-LB relationship.
Abstract Copyright: ∼
Journal keyword(s): galaxies: elliptical and lenticular, CD - Galaxies: ISM - Galaxies: Photometry - Infrared: Galaxies
Simbad objects: 61
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