Proton Synchrotron Radiation from Extended Jets of PKS 0637-752 and 3C 273

Abstract

Recently, the IC/CMB X-ray mechanism has been strongly disfavoured for 3C 273 and PKS 0637-752 since the anomalously hard and steady gamma-ray emission predicted by such models violates the observational results from Fermi-LAT. Here we propose the proton synchrotron origin of the X ray-gamma ray flux from the knots of PKS 0637-752 with a reasonable budget in luminosity, by considering synchrotron radiation from an accelerated proton population. Moreover, for the source 3C 273, some of the optical data points could not be explained by electron synchrotron (Meyer et al. 2015), which we have included in our updated proton synchrotron model. We also show that TeV emission from large scale quasar jets in principle, can arise from proton synchrotron, which we discuss in the context of knot wk8.9 of PKS 0637-752.

8 pages, 5 figures, accepted in The Astrophysical Journal

References in corpus (6)

• The multiwavelength variability of 3C 273
• New Chandra observations of the jet in 3C273. I. Softer X-ray than radio spectra and the X-ray emission mechanism
• Shedding New Light on the 3C 273 Jet with the Spitzer Space Telescope
• The radio-ultraviolet spectral energy distribution of the jet in 3C273
• Ruling out IC/CMB X-rays in PKS 0637-752 and the Implications for TeV Emission from Large-Scale Quasar Jets
• Possible Proton Synchrotron Origin of X-Ray & Gamma Ray Emission in Large Scale Jet of 3C 273

Cited by in corpus (9)

• Particle Acceleration in Mildly Relativistic Shearing Flows: the Interplay of Systematic and Stochastic Effects, and the Origin of the Extended High-energy Emission in AGN Jets
• Fermi non-detections of four X-ray jet sources and implications for the IC/CMB mechanism
• Detection of an optical/UV jet/counterjet and Multiple Spectral Components in M84
• Investigation of the Gamma-ray Spectrum of CTA 102 During the Exceptional Flaring State in 2016-2017
• A Photo-Hadronic Model of the Large Scale Jet of PKS 0637-752
• Constraints on Proton Synchrotron Origin of Very High Energy Gamma Rays from the Extended Jet of AP Librae
• A Two Population Electron Synchrotron Model For Knots of Extended Jets
• Determining the composition of radio plasma via circular polarization: the prospects of the Cygnus A hot spots
• A Photo-Hadronic Model of the Large Scale Jets of 3C 273 and PKS 1136-135