Two-Component Model for the AGN Broad Line Region

AbstractWe modeled the single-peaked Broad Emission Lines (BELs) with two-component model (accretion disk, with surrounding spherical region), comparing it with observational line profiles for a number of Active Galactic Nuclei (AGN). We find that the accretion in the Broad Line Region (BLR) can be present even if the profiles of BELs are single-peaked.

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LOCATING THE BLAZAR EMISSION SITE WITH FERMI VARIABILITY

International Journal of Modern Physics Conference Series ◽

10.1142/s2010194512004394 ◽

2012 ◽

Vol 08 ◽

pp. 37-42

Author(s):

MARKOS GEORGANOPOULOS ◽

AMANDA DOTSON ◽

DEMOSTHENES KAZANAS ◽

ERIC PERLMAN

Keyword(s):

Energy Dissipation ◽

Broad Line ◽

Jet Formation ◽

Spectral Variability ◽

Ongoing Debate ◽

Broad Line Region ◽

Photon Field ◽

First Case ◽

Line Region

This work presents a method for settling the following ongoing debate: is the GeV emission of powerful blazars produced inside the sub-pc size broad line region (BLR) or further out at scales of ~ 10 pc where the IR photon field of the dusty molecular torus dominates over that the UV field of the BLR? In the first case the GeV emission is most probably external Compton (EC) scattering of the ~ 10 eV BLR photons21, while in the second the seed photons for the EC GeV emission are the ~ 0.1 eV photons of the dust9 in the molecular torus8. The issue of the energy dissipation location is connected to the jet formation and collimation process25 and, as we argue here, can be resolved with Fermi spectral variability observations.

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Hadronuclear interpretation of the possible neutrino emission from PKS B1424-418, GB6 J1040+0617 and PKS 1502+106

Research in Astronomy and Astrophysics ◽

10.1088/1674-4527/21/12/305 ◽

2022 ◽

Vol 21 (12) ◽

pp. 305

Author(s):

Ze-Rui Wang ◽

Rui Xue

Keyword(s):

Detection Rate ◽

Spectral Energy Distribution ◽

Spectral Energy ◽

Broad Line ◽

Central Black Hole ◽

Proton Proton ◽

Broad Line Region ◽

Neutrino Detection ◽

Line Region ◽

Jet Power

Abstract In addition to neutrino event IceCube-170922A which is observed to be associated with a γ-ray flare from blazar TXS 0506+056, there are also several neutrino events that may be associated with blazars. Among them, PKS B1424-418, GB6 J1040+0617 and PKS 1502+106 are low synchrotron peaked sources, which are usually believed to have the broad line region in the vicinity of the central black hole. They are considered as counterparts of IceCube event 35, IceCube-141209A and IceCube-190730A, respectively. By considering the proton-proton (pp) interactions between the dense gas clouds in the broad line region and the relativistic protons in the jet, we show that the pp model that is applied in this work can not only reproduce the multi-waveband spectral energy distribution but also suggest a considerable annual neutrino detection rate. We also discuss the emission from the photopion production and Bethe-Heitler pair production with a sub-Eddington jet power that is suggested in our model and find that it has little effect on the spectrum of total emission for all of three sources.

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