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dc.contributor.authorChen, Xuhui
Fossati, Giovanni
Bottcher, Markus
Liang, Edison
dc.date.accessioned 2013-03-14T19:41:12Z
dc.date.available 2013-03-14T19:41:12Z
dc.date.issued 2012
dc.identifier.citation Chen, Xuhui, Fossati, Giovanni, Bottcher, Markus, et al.. "Time-dependent simulations of emission from the FSRQ PKS 1510−089: multiwavelength variability of external Compton and synchrotron self-Compton models." Monthly Notices of the Royal Astronomical Society, 424, (2012) Royal Astronomical Society: 789-799. http://dx.doi.org/10.1111/j.1365-2966.2012.21283.x.
dc.identifier.urihttps://hdl.handle.net/1911/70640
dc.description.abstract We present results of modelling the broad-band spectral energy distribution (SED) and multiwavelength variability of the bright flat spectrum radio quasars PKS 1510−089 with our time-dependent multizone Monte Carlo/Fokker–Planck code. As the primary source of seed photons for inverse Compton scattering, we consider radiation from the broad-line region (BLR), from the hot dust of the molecular torus and the local synchrotron radiation [synchrotron self-Compton (SSC)]. We evaluate the viability of different Compton models by comparing simulated multiwavelength light curves and SEDs with one of the best observed flares by PKS 1510−089, in 2009 March. The time dependence of our code and its correct handling of light travel time effects allow us to fully take into account the effect of the finite size of the active region, and in turn to fully exploit the information carried by time-resolved observed SEDs that are becoming increasingly available since the launch of Fermi. We confirm that the spectrum adopted for the external radiation field has an important impact on the modelling of the SED, in particular for the lower energy end of the Compton component which is observed in the X-ray band, which in turn is one of the most critical bands to assess the differences between external Compton and SSC emission. In the context of the scenario presented in this paper, where the flaring is caused by the increase of the number of relativistic electrons ascribed to the effect of the interaction of a portion of the jet (blob) with a shock, we cannot firmly discriminate the three main scenarios for γ -ray emission. However, results show clearly the differences produced by a more realistic treatment of the emitting source in the shape of SEDs and their time variability over relevant, observable time-scales, and demonstrate the crucial importance of time-dependent multizone models to advance our understanding of the physics of these sources, by taking full advantage of the wealth of information offered by the high-quality data of current multiwavelength Campaigns.
dc.language.iso eng
dc.publisher Royal Astronomical Society
dc.rights Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
dc.title Time-dependent simulations of emission from the FSRQ PKS 1510−089: multiwavelength variability of external Compton and synchrotron self-Compton models
dc.type Journal article
dc.contributor.funder National Aeronautics and Space Administration
dc.contributor.funder National Science Foundation
dc.contributor.funder Sun Microsystems
dc.contributor.funder Sigma Solutions, Inc.
dc.citation.journalTitle Monthly Notices of the Royal Astronomical Society
dc.subject.keywordradiation mechanisms: non-thermal
methods: numerical
galaxies: active
galaxies: jets
quasars: individual: PKS 1510-089
dc.citation.volumeNumber 424
dc.embargo.terms none
dc.type.dcmi Text
dc.identifier.doihttp://dx.doi.org/10.1111/j.1365-2966.2012.21283.x
dc.type.publication publisher version
dc.citation.firstpage 789
dc.citation.lastpage 799


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