The Radio-Loud Narrow-Line Quasar SDSS J172206.03+565451.6
作者： Stefanie Komossa , Wolfgang Voges , Hans‐Martin Adorf , Dawei Xu , Smita Mathur
DOI: 10.1086/499764
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摘要: We report identification of the radio-loud narrow-line quasar SDSS J172206.03+565451.6, which we found in course a search for active galactic nuclei (AGNs). J172206.03+565451.6 is only about fourth securely identified and second-most radio loud, with index R1.4 ≈ 100-700. Its black hole mass, MBH (2-3) × 107 M☉ estimated from Hβ line width 5100 A luminosity, unusually small given its loudness, combination mass puts scarcely populated region MBH-R diagrams. classical Seyfert 1-type object FWHMHβ 1490 km s-1, an intensity ratio [O ]/Hβ 0.7, Fe II emission complexes λ4570/Hβ 0.7. The ionization parameter region, ]/[O ], similar to Seyferts, high [Ne ]/[Ne ] indicates strong EUV-to-soft X-ray excess. advertise combined usage diagrams as useful diagnostic tool estimate parameters constrain EUV-soft continuum shape relatively independently other parameters.
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