The Radio and $\gamma$-ray Variability Analysis of S5 0716+714

TL;DR

This study analyzes the variability of the blazar S5 0716+714 at radio and gamma-ray frequencies, identifying potential periodicities and exploring emission mechanisms responsible for observed differences.

Contribution

It presents the first combined analysis of radio and gamma-ray variability for S5 0716+714, revealing possible periodicities and linking variability timescales to emission processes.

Findings

Possible periodicity of 266 days at 15 GHz radio band.

Possible periodicity of 344 days at gamma-ray band.

Different variability timescales suggest distinct emission mechanisms.

Abstract

We have studied the variability of \object{S5 0716+714} at radio 15 GHz and $\gamma$-ray band using three different methods. A possible periodicity of $P_{15 GHz}=266.0\pm11.5$ and $P_{\gamma}=344.0\pm16.4$ days are obtained for radio 15 GHz and $\gamma$-ray light curves, respectively. The variability may be related to the intrinsically emission mechanism. The difference between the variability timescales of radio 15 GHz and $\gamma$-ray may be due to that the emission of radio 15 GHz is produced via the synchrotron process, while the $\gamma$-ray is produced by both the SSC and EC processes.