Leptonic modelling of Ton 599 in flare and quiescent states
| Autor: | V. R. Chitnis, S. R. Patel |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Physics
010308 nuclear & particles physics Astrophysics::High Energy Astrophysical Phenomena Astronomy and Astrophysics Astrophysics::Cosmology and Extragalactic Astrophysics Astrophysics 01 natural sciences law.invention Space and Planetary Science law 0103 physical sciences Ton 010303 astronomy & astrophysics Flare |
| Zdroj: | Monthly Notices of the Royal Astronomical Society. 492:72-78 |
| ISSN: | 1365-2966 0035-8711 |
| Popis: | The flat-spectrum radio quasar Ton 599 attained its highest ever γ-ray flux state during the first week of 2017 November. Observations of the source by the Swift satellite during this period made it possible to generate a simultaneous high flux state broad-band spectral energy distribution (SED). The high flux state activity of Ton 599 is modelled in this work for the first time. We modelled one high flux state and one quiescent state of the source in order to characterize the evolution of SEDs covering the entire dynamic range of γ-ray flux observed by Fermi-LAT. An attempt was made to model the 2017 November state of the source using an external Compton (EC) model in the leptonic scenario. We reproduce the broad-band flaring state SED using a two-component leptonic emission model. We considered one component as an EC+synchrotron self-Compton (SSC) component and the other as pure SSC, lying further down in the jet. The EC+SSC component was located outside the broad-line region (BLR). It mainly reproduces the GeV emission by an EC process with a dusty torus (DT) photon field providing seed photons. We reproduce the broad-band emission from Ton 599 satisfactorily during its peculiar flaring state with a leptonic two-component model. Besides this, we compare the model parameters of a quiescent-state SED with the available average state model parameters in the literature. |
| Databáze: | OpenAIRE |
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