The jet–disc connection in blazars & blazars at high redshift

Talk at the Italian AGN meeting AGN10: "Dall’orizzonte degli eventi all’orizzonte cosmologico'', held in Rome (Italy)

Transcript

1. The jet‐disc connec.on in blazars & blazars at high redshi6 Tullia Sbarrato Universita’ degli Studi dell’Insubria INAF OABrera – Merate AGN10 ‐ Roma, 2012 September 10‐13
2. Jets and discs in blazars G. Ghisellini, L. Maraschi, M. Colpi
3. Blazar SED: jet dominance
4. Jet and disc tracers jet power (Pj ) disc emission (M, MBH ) LBLR Lγ •  SDSS DR7 Quasar Catalog (Schneider et al. 2010) analysed by Shen et al. (2011) •  Plotkin et al. (2011) •  SDSS DR6 (Adelman‐McCarthy et al. 2008) Clean 1LAC sample (Abdo et al. 2010)
5. BLR vs gamma‐ray luminosity 60 FSRQs opTcally selected from Ghisellini et al. 2011 and Shen et al. 2011 103 BL Lacs: 18 with both L det, 23 UL on LBLR , 62 UL on both L from Ghisellini et al. 2011, Plotkin et al. 2011 and Adelmann‐McCarthy et al. 2008 5 x 10‐4 Sbarrato et al. (2012a)
6. BLR vs gamma‐ray luminosity + 124 Fermi selected FSRQs spectroscopically analysed by Shaw et al. 2012
7. Ld = ηMc2 Is this correla.on expected? Good correla.on: Inverse Compton on BLR photons? deeper connecTon? accre.on? Mahadevan (1997)
8. Ld = ηMc2 Is this correla.on expected? Good correla.on: Inverse Compton on BLR photons? deeper connecTon? accre.on? M Mahadevan (1997)
9. Is this correla.on expected? Good correla.on: Inverse Compton on BLR photons? deeper connecTon? accre.on? Ghisellini et al. 2010
10. Is this correla.on expected? Good correla.on: Inverse Compton on BLR photons? deeper connecTon? accre.on? we expect a break! Log Pjet / Ledd
11. Is this correla.on expected? No Break! Pr = beYer proxy for Pj
13. Jets and discs at high redshi6 G. Ghisellini, M. Nardini, G. Tagliaferri, L. Foschini, G. Ghirlanda, F. Tavecchio, J. Greiner, A. Rau, N. Gehrels
14. Blazars at high redshi6 •  intrinsic high luminosity & beaming of jet likely visible at very high redshia •  each blazar counts for 2Γ2 (~400) analogous AGN not aligned •  most powerful quasars host most massive BH search of high‐z blazars is compe88ve with search of high‐z radio‐quiet AGN to study most massive early BH
15. The discovery of a blazar at z=5.3 Sbarrato et al. (2012b) MBH es8mate: see talk by Giorgio Calderone!
16.   LBLR ∝ Lγ (normalized to LEdd )   blazars’ divide: LBLR =5x10‐4LEdd (new classificaTon!)   different accre.on regimes responsible for the blazars’ divide?   search of high‐z blazars search of very massive early BH   we found a blazar at z=5.3 with a systema.c approach Conclusions