Abstract Details
| Name: Pranjupriya Goswami Affiliation: Tezpur University, Sonitpur Conference ID: ASI2019_490 Title : Synchrotron spectral curvature of blazars as probe to understand electron diffusion Authors and Co-Authors : Pranjupriya Goswami(1), Sunder Sahayanathan(2), Ranjeev Misra(3), Atreyee Sinha(4) and Rupjyoti Gogoi(1) ; (1) Tezpur University, Napaam-784028, India (2) Bhabha Atomic Research Centre, Mumbai-400085, India (3) Inter-University Centre for Astronomy and Astrophysics, Pune-411007, India (4) APC, AstroParticule et Cosmologie, Université Paris Diderot,75205 Paris Cedex 13, France Abstract Type : Poster Abstract Category : Extragalactic Astronomy Abstract : X-ray spectra of blazars show significant spectral curvature and have been a matter of considerable interest in recent years. For high energy peaked blazars(HBLs), the spectral component at X-ray energies are often well fitted by a log parabolic model. However, log-parabola model fails to explain the low energy spectra as we extend the energies towards optical. We report the study of synchrotron spectral curvature of HBL object Mkn421 using simultaneous observations from Swift-XRT -- NuSTAR and XMM-Newton observations. We investigate whether this smooth curvature can be attributed to the energy dependence of the escape timescale from the main acceleration region. The semi-analytical model developed under this scenario can fit the observed synchrotron spectra in a wide range of energies. Notably, our results show a clear anti-correlation between the energy dependence parameter and the spectral index which can have interesting implications regarding the acceleration processes and the inherent properties within the jet environment. The physical interpretation on the model parameters is extensively discussed in this work. |