(netzer chapter 6) - wordpress.com · · 2014-12-012014-12-01 · questions to be considered for...
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AGN 1.2 - AGN Classification and Unification (Netzer chapter 6)
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Questions to be considered for AGN classification
Group 1
• What is the power-house of the source? • What is the SED of the source? • What are the properties of the host galaxy? • What is the inlination of the source to the observer´s line iof sight? • What is the phase of activity and the amount of gas supply to the center?
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Group 2
• What is the BH mass? • What is the spin of the BH? • What is the accretion rate? • What is the gas and dust content, and the metallicity, in the nuclear
region? • What are the properties of the host galaxy?
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Group 3
• What is the intensity and EW of the observed emission lines? • What is the typical width of the observed emission lines? • What is the level of ionization of the line-emitting gas? • How strong is the radio source? • Can we see beamed, nonthermal radiation, and at what energies? • Is there evidence for central obscuration? • What are the variability amplitude and time scale?
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1.2.1 – Diagnostic Diagrams
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1.2.2 - Type I and Type II AGNs
• Spectropolarimetry • X-ray absorption • Ionization cones • Real type-II?
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Spectro -polarimetry
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X-Ray absorption
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Ionization cones
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1.2.3 – Radio-loud and gamma-ray loud AGN
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FRI and FRII radiogalaxies Faranoff & Riley (FR) classification
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1.2.4 Lineless AGNs
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1.2.5 – Low luminosity AGN (LLAGN) and LINERs
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1.2.6 – Narrow and broad absorption-line AGNs
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BAL AGN
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1.2.7 – AGN Unification
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AGN Unified Model
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The AGN zoo:
• QSO • Quasar • Radio-galaxy • NLRG • NLXG • Blazar (BL Lac object) • OVV • Seyfert Galaxy (type 1 and type 2) • LINER