Possible gamma-ray emission of radio intermediate AGN III Zw 2 and its implication on the evolution of jets in AGNs - Astrophysics > High Energy Astrophysical PhenomenaReport as inadecuate




Possible gamma-ray emission of radio intermediate AGN III Zw 2 and its implication on the evolution of jets in AGNs - Astrophysics > High Energy Astrophysical Phenomena - Download this document for free, or read online. Document in PDF available to download.

Abstract: AGNs with hard $\gamma$-ray emission identified so far are radio-loud. III Zw2 is a radio intermediate AGN with a relativistic jet. We study its spectralenergy distribution SED and find that the broad band emissions are dominatedby the non-thermal emissions from the jet. We model its SED through asynchrotron + inverse Compton IC model. The results show that the ICcomponent of III Zw 2 peaks at a few MeV, and the flux density drops rapidly athigher energy with photon index $\Gamma\approx3.3$ above 0.1 GeV. The predictedflux is slightly over the sensitivity of $Fermi$-LAT, but it is not included inthe first $Fermi$-LAT AGN catalog. The reason for this may be: 1 that the ICpeak is low and the spectrum is very steep above 0.1 GeV, 2 that III Zw 2 isin the low state during the period of the $Fermi$-LAT operation. We also findthat III Zw 2 follows similar jet processes as those in $\gamma$-ray AGNs,e.g., the relation between jet power and radiation power, called the blazarsequence. We suggest that III Zw 2 may be a young source at an earlier stage ofjet activity.



Author: Liang Chen, J. M. Bai, Jin Zhang, H. T. Liu

Source: https://arxiv.org/







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