Title: The submillimeter spectral break in Seyfert galaxies
Abstract: view Abstract Citations (23) References (28) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS The Submillimeter Spectral Break in Seyfert Galaxies Engargiola, G. ; Harper, D. A. ; Elvis, Martin ; Willner, S. P. Abstract We have observed four Seyfert 1 galaxies at 155 microns and three at 370 microns. Two of the galaxies were detected at 155 microns, but none was detected at 370 microns. The 155 micron data and the strong upper limits at 370 microns show that the infrared continua decrease sharply beyond 100-155 microns. These observations depict a clear spectral difference between radio-loud and radio-quiet active galactic nuclei. The limits on the 100-370 micron spectral slope are consistent either with synchrotron self-absorption of a nonthermal source or with thermal dust emission similar to that arising from the disks of normal galaxies. The 155 micron flux from NGC 4151 is spatially extended through a radius of at least 48", arguing for substantial dust emission at λ > 80 microns and an even shorter cutoff wavelength for nonthermal emission from the active nucleus. The spectral breaks implied by our data suggest that the nuclear nonthermal sources must be smaller than ~10 light hours. Publication: The Astrophysical Journal Pub Date: September 1988 DOI: 10.1086/185257 Bibcode: 1988ApJ...332L..19E Keywords: Active Galactic Nuclei; Infrared Sources (Astronomy); Seyfert Galaxies; Submillimeter Waves; Accretion Disks; Emission Spectra; Spectral Energy Distribution; Astronomy; GALAXIES: SEYFERT; GALAXIES: NUCLEI; GALAXIES: INDIVIDUAL NGC NUMBER: NGC 4151; GALAXIES: INDIVIDUAL NGC NUMBER: NGC 4253; INFRARED: SOURCES full text sources ADS | data products SIMBAD (5) NED (5)
Publication Year: 1988
Publication Date: 1988-09-01
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 11
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