Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996aas...189.6709b&link_type=abstract
American Astronomical Society, 189th AAS Meeting, #67.09; Bulletin of the American Astronomical Society, Vol. 28, p.1358
Astronomy and Astrophysics
Astronomy
Scientific paper
Half of ordinary E and E/S0 galaxies have been claimed as weak detections from IRAS observations at 60mu m and 100mu m, indicating that cold gas is common, although no correlation was found between the optical and far infrared fluxes. We reconsider this issue and after excluding AGNs, peculiar systems, and background contamination, only 15 RSA E and E/S0 galaxies are detected above the 98% confidence level, about 10% of the sample. An unusually high percentage of these 15 galaxies possess cold gas (HI, CO) and optical emission lines (Hα ), supporting the presence of gas cooler than 10(4) K; the dust temperature lies in the range 23--38 K. We find a correlation between the far IR and B fluxes (and between their luminosities), indicating that opically bright objects are also brighter in the far infrared, although with considerable dispersion. The dust masses inferred from the far IR are an order of magnitude greater than those from extinction observations, except for the recent merger candidate NGC 4125, where they are equal. Most of the results are consistent with a model where the dust comes from stellar mass loss and the heating is by stellar photons, provided that there are large dust grains composed of amorphous carbon plus silicates.
Bregman Joel N.
Cox Caroline V.
No associations
LandOfFree
Far Infrared Emission From Early-Type Galaxies does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Far Infrared Emission From Early-Type Galaxies, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Far Infrared Emission From Early-Type Galaxies will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-817476