Linkage between accretion disks and blazars |
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| Authors: | Geoffrey V Bicknell Jianke Li |
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| Institution: | (1) Research School of Astronomy & Astrophysics, Australian National University, Cotter Rd., Weston, ACT, 2611, Australia |
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| Abstract: | The magnetic field in an accretion disk is estimated assuming that all of the angular momentum within prescribed accretion
disk radii is removed by a jet. The magnetic field estimated at the base of the jet is extrapolated to the blazar emission
region using a model for a relativistic axisymmetric jet combined with some simplifying assumptions based on the relativistic
nature of the flow. The extrapolated magnetic field is compared with estimates based upon the synchrotron and inverse Compton
emission from three blazars, MKN 501, MKN 421 and PKS 2155-304. The magnetic fields evaluated from pure synchrotron self-Compton
models are inconsistent with the magnetic fields extrapolated in this way. However, in two cases inverse Compton models in
which a substantial part of the soft photon field is generated locally agree well, mainly because these models imply magnetic
field strengths consistent with an important Poynting Flux component. This comparison is based on estimating the mass accretion
rate from the jet energy flux. Further comparisons along these lines will be facilitated by independent estimates of the mass
accretion rate in blazars and by more detailed models for jet propagation near the black hole. |
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| Keywords: | Accretion disks Black holes Blazars Jets |
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