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dc.contributor.authorBaring, Matthew G.
dc.contributor.authorBöttcher, Markus
dc.date.accessioned2020-03-31T13:49:24Z
dc.date.available2020-03-31T13:49:24Z
dc.date.issued2019
dc.identifier.citationBaring, M.G. & Böttcher, M. 2019. Time-dependent, multi-wavelength shock acceleration models for active flares of 3C 279. Proceedings of High Energy Phenomena in Relativistic Outflows VII (HEPRO VII), Barcelona (Spain), 9-12 July 2019. Proceedings of science, 354: #055. [https://doi.org/10.22323/1.354.0055]en_US
dc.identifier.issn1824-8039
dc.identifier.urihttp://hdl.handle.net/10394/34465
dc.identifier.urihttps://pos.sissa.it/354/055/pdf
dc.identifier.urihttps://doi.org/10.22323/1.354.0055
dc.description.abstractJets in blazars are an excellent forum for studying acceleration at relativistic shocks using the highly-variable emission seen across the electromagnetic spectrum. Our recent work on combining multi-wavelength leptonic emission models with simulated thermal+non-thermal distributions from shock acceleration theory has resulted in new insights into plasma conditions in blazars. This has demonstrated the ability to infer the cyclotron frequency, the plasma density and thus also the Alfven speed, thereby determining the rapidity of particle energization. An important inference was that MHD turbulence levels decline with remoteness from jet shocks. This paper outlines new results from our recent extension of this program to a two-zone, time-evolving construction, modeling together both extended, enhanced emission states from larger radiative regions, and prompt flare events from compact acceleration zones. These are applied to flares in the FSRQ blazar 3C 279 monitored by Fermi-LAT in gamma-rays in late 2013. With impulsive injection episodes from the shock zone, as the acceleration first proceeds and then abates, the radiative simulations obtain a pronounced spectral hardening in the optical and gamma-ray bands as the flare grows, followed by a softening during the decay phase. For 3C 279, while model radio and X-ray synchrotron flares are temporally correlated, there is a lag in both bands relative to GeV gamma rays and optical emission on timescales of a number of hours. This delay is governed by the short cooling time associated with the bright external Compton signalen_US
dc.language.isoenen_US
dc.publisherSissa Medialaben_US
dc.titleTime-dependent, multi-wavelength shock acceleration models for active flares of 3C 279en_US
dc.typePresentationen_US
dc.contributor.researchID24420530 - Böttcher, Markus


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