Possible Proton Synchrotron Origin of X-Ray & Gamma Ray Emission in Large Scale Jet of 3C 273

Abstract

The large scale jet of quasar 3C 273 has been observed in radio to $\gamma$ ray frequencies. Earlier the X-ray emission from knot A of this jet has been explained with inverse Compton scattering of the cosmic microwave background radiations by the shock accelerated relativistic electrons in the jet. More recently it has been shown that this mechanism overproduces the gamma ray flux at GeV energy and violates the observational results from Fermi LAT. We have considered the synchrotron emission from a broken power law spectrum of accelerated protons in the jet to explain the observed X-ray to $\gamma$ ray flux from knot A. The two scenarios discussed in our work are (i) magnetic field is high, synchrotron energy loss time of the protons is shorter than their escape time from the knot region and the age of the jet (ii) their escape time is shorter than their synchrotron energy loss time and the age of the jet. These scenarios can explain the observed photon spectrum well for moderate values of Doppler factor. The required jet luminosity is high $\sim 10^{46}$ erg/sec in the first scenario and moderate $\sim 10^{45}$ erg/sec in the second, which makes the second scenario more favorable.

arXiv comment4 pages, 1 figure, Accepted in MNRAS Letters

References in corpus (16)

• Leptonic and Hadronic Modeling of Fermi-Detected Blazars
• TeV Gamma Rays from BL Lac Objects due to Synchrotron Radiation of Extremely High Energy Protons
• Multiwavelength Observations of Strong Flares From the TeV-Blazar 1ES 1959+650
• A survey of extended radio jets with Chandra and HST
• Proton synchrotron radiation of large-scale jets in active galactic nuclei
• Structure of the X-ray Emission from the Jet of 3C 273
• Chandra Observations of the X-Ray Jet of 3C273
• 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
• HST and MERLIN Observations of the Jet in 3C273
• Testing the beamed inverse-Compton model for jet X-ray emission: velocity structure and deceleration?
• The radio-ultraviolet spectral energy distribution of the jet in 3C273
• Fermi Rules Out the IC/CMB Model for the Large Scale Jet X-ray Emission of 3C 273
• Nonthermal Radiation Processes in X-ray Jets
• Astrophysical ZeV acceleration in the relativistic jet from an accreting supermassive blackhole
• Active Galactic Nuclei as High Energy Engines

Cited by in corpus (9)

• Ruling out IC/CMB X-rays in PKS 0637-752 and the Implications for TeV Emission from Large-Scale Quasar Jets
• Multiwavelength Analysis of the Variability of the Blazar 3C 273
• X-ray Intraday Variability and Power Spectral Density Profiles of the Blazar 3C 273 with XMM-Newton during 2000-2021
• Proton Synchrotron Radiation from Extended Jets of PKS 0637-752 and 3C 273
• Constraints on Proton Synchrotron Origin of Very High Energy Gamma Rays from the Extended Jet of AP Librae
• Leptonic or Hadronic Emission: X-Ray Radiation Mechanism of Large-scale Jet Knots in 3C 273
• Advection of Accelerated Electrons in Radio/X-ray Knots of AGN Jets
• On the Hadronic Origin of High Energy Emission of $\gamma$-ray Loud Narrow-Line Seyfert 1 PKS 1502+036
• A Two Population Electron Synchrotron Model For Knots of Extended Jets