Intrinsic $\gamma$-ray luminosity, black hole mass, jet and accretion in Fermi blazars

Abstract

We have analyzed a large sample of clean blazars detected by Fermi Large Area Telescope (LAT). Using literature and calculation, we obtained intrinsic $\gamma$-ray luminosity excluding beaming effect, black hole mass, broad-line luminosity (used as a proxy for disk luminosity), jet kinetic power from "cavity" power and bulk Lorentz factor for parsec-scale radio emission, and studied the distributions of these parameters and relations between them. Our main results are as follows. (i) After excluding beaming effect and redshift effect, intrinsic $\gamma$-ray luminosity with broad line luminosity, black hole mass and Eddington ratio have significant correlations. Our results confirm the physical distinction between BL Lacs and FSRQs. (ii) The correlation between broad line luminosity and jet power is significant which supports that jet power has a close link with accretion. Jet power depends on both the Eddington ratio and black hole mass. We also obtain $Log{L}_{\mathrm{BLR}}\sim (0.98\pm 0.07)Log{P}_{\mathrm{jet}}$ for all blazars, which is consistent with the theoretical predicted coefficient. These results support that jets are powered by energy extraction from both accretion and black hole spin (i.e., not by accretion only). (iii) For almost all BL Lacs, $P_{\mathrm{jet}}>L_{\mathrm{disk}}$; for most of FSRQs, $P_{\mathrm{jet}}<L_{\mathrm{disk}}$. The "jet-dominance" (parameterized as $\frac{P_{\mathrm{jet}}}{L_{\mathrm{disk}}}$) is mainly controlled by the bolometric luminosity. Finally, the radiative efficiency of $\gamma$-ray and properties of TeV blazars detected by Fermi LAT were discussed.

24 pages, 1 table, 18 figures, Accepted for publication in MNRAS. arXiv admin note: text overlap with arXiv:1209.4702, arXiv:1012.0308 by other authors. text overlap with arXiv:1209.4702 by other authors

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