New prediction of extragalactic GeV gamma-ray emission from radio lobes of young AGN jets

Abstract

We present a new prediction of GeV $\gamma$-ray emission from radio lobes of young AGN jets. In the previous work of Kino et al. (2007), MeV $\gamma$-ray bremsstrahlung emission was predicted from young cocoons/radio-lobes in the regime of no coolings. In this study, we include cooling effects of bremsstrahlung emission and adiabatic loss. With the initial conditions determined by observed young radio lobes, we solve a set of equations describing the expanding lobe evolution. Then we find that the lobes initially have electron temperature of $\sim$GeV, and they cool down to $\sim$MeV by the adiabatic loss. Correspondingly, the lobes initially yield bright bremsstrahlung luminosity in $\sim$GeV range and they fade out. We estimate these $\gamma$-ray emissions and show that nearby young radio lobes could be detected with Fermi Gamma-ray Space Telescope.

5 pages, 3 figures, MNRAS Letters, accepted

References in corpus (13)

• Sub-milliarcsecond Imaging of Quasars and Active Galactic Nuclei III. Kinematics of Parsec-Scale Radio Jets
• On the prevalence of radio-loud AGN in brightest cluster galaxies: implications for AGN heating of cooling flows
• Implications of very rapid TeV variability in blazars
• Rapid variability in TeV blazars: the case of PKS 2155-304
• On the Evolution of and High-Energy Emission from GHz-Peaked-Spectrum Sources
• X-ray Properties of the GigaHertz-Peaked and Compact Steep Spectrum Sources
• Constraining the nature of High Frequency Peakers. I. The spectral variability
• Electron-ion coupling upstream of relativistic collisionless shocks
• The Kinematic and Spectral Ages of the Compact Radio Source CTD 93
• The Fate of Young Radio Galaxies: Decelerations Inside Host Galaxies?
• Absence of Electron Surfing Acceleration in a Two-Dimensional Simulation
• Extragalactic MeV gamma-ray emission from cocoons of young radio galaxies
• XMM-NEWTON Detection of X-ray Emission from the Compact Steep Spectrum Radio Galaxy 3C303.1

Cited by in corpus (11)

• Compact steep-spectrum and peaked-spectrum radio sources
• TXS 0128+554: A Young Gamma-Ray Emitting AGN With Episodic Jet Activity
• Jet Properties of Compact Steep-Spectrum Sources and an Eddington-Ratio-Driven Unification Scheme of Jet Radiation in Active Galactic Nuclei
• Parsec-scale jet properties of the gamma-ray quasar 3C 286
• Spectroscopic classification, variability and SED of the Fermi-detected CSS 3C 286: the radio-loudest NLS1 galaxy?
• Mid-Infrared Diagnostics of the Circumnuclear Environments of the Youngest Radio Galaxies
• The MHz-peaked radio spectrum of the unusual gamma-ray source PMN J1603-4904
• Two-temperature Magnetohydrodynamic simulations for sub-relativistic AGN jets:Dependence on the fraction of the electron heating
• Highly Variable $\gamma$-Ray Emission of CTD 135 and Implications for its Compact Symmetric Structure
• The Quasar CTD 135 is Not a Compact Symmetric Object
• Multiwavelength and parsec-scale properties of extragalactic jets