An infrared and optical investigation of galactic nuclei with compact radio sources

Abstract

view Abstract Citations (44) References (39) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS An infrared and optical investigation of galactic nuclei with compactRadio Source. Heckman, T. M. ; Lebofsky, M. J. ; Rieke, G. H. ; van Breugel, W. Abstract Infrared multicolor (JHKLN) photometry and optical spectrophotometry of a sample of bright (mv less than or = 18) galaxies with powerful compact nuclear radio sources (S greater than or = 200 mJy at 5 GHz) are presented. Nearly all of the objects (85 percent or more) have a nonstellar optical-infrared nuclear continuum whose strength is roughly proportional to that of the compact radio source. Except for their lower luminosities, the nuclei in these galaxies probably resemble radio-loud quasars. Compact nuclear radio sources with associated large-scale double radio lobes probably have enhanced nonstellar optical-infrared continua compared to the objects without such extended radio emission. The sample is diverse in its emission-line properties. Generally, the radio-loud objects have much stronger emission lines than do the nuclei of normal (radio-quiet) early-type galaxies. Publication: The Astrophysical Journal Pub Date: September 1983 DOI: 10.1086/161308 Bibcode: 1983ApJ...272..400H Keywords: Astronomical Spectroscopy; Galactic Nuclei; Infrared Astronomy; Optical Emission Spectroscopy; Quasars; Radio Sources (Astronomy); Emission Spectra; Line Spectra; Luminosity; Astrophysics full text sources ADS | data products SIMBAD (27) NED (26)