Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985mnras.213p..67a&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 213, March 15, 1985, p. 67P-74P.
Astronomy and Astrophysics
Astronomy
50
Galaxies, H Alpha Line, Infrared Astronomy Satellite, Infrared Spectrophotometers, Luminosity, Active Galaxies, Histograms, Red Shift, Seyfert Galaxies, Spiral Galaxies, Starburst Galaxies, Wavelengths
Scientific paper
Optical spectroscopy and near-infrared photometry of 19 optically faint galaxies which have been discovered as intense 100-micron sources by IRAS are reported. All have low-excitation emission lines with redshifts up to 0.2, and some exceed 10 to the 12th solar luminosity in their infrared luminosities. No evidence of Seyfert-like spectra is found, but instead starburst activity is suspected to power the infrared emission. Many of the galaxies are clearly disturbed or show evidence of interaction with neighbors; the highest redshift source consists of a trio of emission galaxies. By selecting IRAS galaxies with faint optical counterparts, a subset of infrared-luminous galaxies which do not show the Seyfert characteristics seen in surveys of extragalactic IRAS sources identified with optically brighter objects is isolated. The intrinsic luminosities of some of the sample are higher than those of any previously known active galaxies, and are comparable to those of many quasars.
Allen David A.
Norris Ray P.
Roche Patrick F.
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