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Paper: Magnetic Field Strength in Parsec-Scale Blazar Jets
Volume: 427, Accretion and Ejection in AGN: a Global View
Page: 207
Authors: O’ Sullivan, S. P.; Gabuzda, D. C.
Abstract: We present magnetic field strength estimates from measurements of the frequency-dependent shift of the parsec-scale radio core of four blazar jets using VLBA observations from 4.6–43 GHz. We find field strengths of the order of 100’s of mG at 1 pc from the base of these jets. Extrapolation of our results (B ∝ r–1, where r is the distance from the base of the jet) to the jet launching regions leads to magnetic field strengths consistent with those expected from theoretical simulations of magnetically powered jets.
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