Combined synchrotron and nonlinear synchrotron-self-Compton cooling of relativistic electrons

Schlickeiser, R.; Böttcher, M.; Menzler, U.

doi:10.1051/0004-6361/201014087

Cited by 23 publications

(29 citation statements)

References 18 publications

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“…The solution for Eq. (2.1) has been calculated by [10] and depends on the value of α. For α 1, aka linearly cooling sources, the solution becomes…”

Section: Time-dependent Ssc Coolingmentioning

confidence: 99%

Time-dependent injection as a model for rapid blazar flares

Zacharias¹

2016

Proceedings of the 34th International Cosmic Ray Conference — PoS(ICRC2015)

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The detection of very rapid flares on the order of minutes in blazars has spawned a lot of theoretical activity. Even though many models take time-dependent effects (such as varying magnetic fields, etc) into account, a time-dependent nature of the injection process is usually omitted. In this presentation it is shown using the standard one-zone model that time-dependent injection has strong effects on the resulting spectra of blazars. Due to the time-dependency of the injection the particles cannot reach an equilibrium state and the kinetic equation for the electron distribution function becomes non-linear. This leads to (i) much faster electron cooling and (ii) a change in the cooling process after some time depending on the injection parameters. This change in the cooling process has direct and very significant effects for the spectrum of a flaring blazar.

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“…The solution for Eq. (2.1) has been calculated by [10] and depends on the value of α. For α 1, aka linearly cooling sources, the solution becomes…”

Section: Time-dependent Ssc Coolingmentioning

confidence: 99%

Time-dependent injection as a model for rapid blazar flares

Zacharias¹

2016

Proceedings of the 34th International Cosmic Ray Conference — PoS(ICRC2015)

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“…It should be noted that α is independent of the magnetic field strength. The solution for Equation (1) has been calculated by [10], and depends on the value of α. For α 1 (i.e., linearly cooling sources), the solution becomes…”

Section: Time-dependent Ssc Coolingmentioning

confidence: 99%

“…The SED is then derived by a time-integration of the intensity. Details for all components can be found in [10,12,13].…”

Section: The Spectral Energy Distributionmentioning

confidence: 99%

Time-Dependent Injection as a Model for Rapid Blazar Flares

Zacharias

2016

Galaxies

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Time-dependent injection can cause non-linear cooling effects, which lead to a faster energy loss of the electrons in jets. The most obvious result is the appearance of unique breaks in the SED, which would normally be attributed to a complicated electron distribution. Knowledge of the observation time and duration is important for the interpretation of the observed spectra, because of the non-trivial evolution of the spectral energy distributions (SED). Intrinsic gamma-gamma absorption processes in the emission region are only of minor importance.

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“…This is particularly true for bright FSRQs and implies that in such sources the inverse Compton (SSC) losses are at least equal or greater than synchrotron losses. The Compton dominance can be measured as the ratio of SSC to synchrotron losses [7]. The SSC models usually fail to account for higher Compton dominance in many sources, suggesting that a higher order SSC cooling term must be used.…”

Section: Nonlinear Ssc Modelmentioning

confidence: 99%

“…The SSC models usually fail to account for higher Compton dominance in many sources, suggesting that a higher order SSC cooling term must be used. The time dependent nonlinear SSC cooling term in Thomson limit, as furnished by [8].…”

Section: Nonlinear Ssc Modelmentioning

confidence: 99%

Nonlinear synchrotron self-compton modelling of blazars

Anjum

Tammi

2015

2015 Fourth International Conference on Aerospace Science and Engineering (ICASE)

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Blazars are active galactic nuclei which emit powerful plasma jets close to our line of sight. The plasma emits radiation via synchrotron and inverse Compton processes. In inverse Compton models, it is generally assumed that the high energy emission is produced via external Compton where the radiation sources external-to-jet, such as accretion disk or broad line clouds provide the soft photons for inverse Compton scattering. Synchrotron self-Compton models generally underproduce the gamma-ray flux levels generally observed in bright sources.We report the implications of nonlinear cooling in synchrotron self-Compton models and suggest that the such a model can reproduce the entire spectral energy distribution of blazars selfconsistently. Our results imply that the synchrotron self-Compton cooling may turn nonlinear in powerful gamma-ray sources, especially during the high energy flares.

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Combined synchrotron and nonlinear synchrotron-self-Compton cooling of relativistic electrons

Cited by 23 publications

References 18 publications

Time-dependent injection as a model for rapid blazar flares

Time-dependent injection as a model for rapid blazar flares

Time-Dependent Injection as a Model for Rapid Blazar Flares

Nonlinear synchrotron self-compton modelling of blazars

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