Abstract
view Abstract Citations (70) References (46) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Compact Radio Cores in Seyfert Galaxies Roy, A. L. ; Norris, R. P. ; Kesteven, M. J. ; Troup, E. R. ; Reynolds, J. E. Abstract We have observed a sample of 157 Seyfert galaxies with a 275 km baseline radio interferometer to search for compact, high brightness temperature radio emission from the active nucleus. We obtain the surprising result that compact radio cores are much more common in Seyfert 2 than in Seyfert 1 galaxies, which at first seems to be inconsistent with orientation unification schemes. We propose a model, involving optical depth effects in the narrow-line region, which can reconcile our result with the standard unified scheme. Publication: The Astrophysical Journal Pub Date: September 1994 DOI: 10.1086/174589 arXiv: arXiv:astro-ph/9404080 Bibcode: 1994ApJ...432..496R Keywords: Active Galactic Nuclei; Brightness Temperature; Radio Emission; Radio Sources (Astronomy); Seyfert Galaxies; Astronomical Models; Line Spectra; Optical Thickness; Radio Interferometers; Very Long Base Interferometry; Astrophysics; GALAXIES: ACTIVE; GALAXIES: NUCLEI; GALAXIES: SEYFERT; RADIO CONTINUUM: GALAXIES; Astrophysics E-Print: 21 pages and 7 figures, uuencoded tar-compressed postscript files, ATP189 full text sources arXiv | ADS | data products SIMBAD (159) NED (159)
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