Multiwavelength Spectral Study of 3C 279 in the Internal Shock Scenario

TL;DR

This study models the spectral energy distributions of 3C 279 during flaring and quiescent states using a multi-slice leptonic jet model within the internal shock scenario, integrating multiwavelength data to understand emission mechanisms.

Contribution

It introduces a detailed, time-dependent leptonic jet model guided by VLBA data to analyze 3C 279's emission states within the internal shock framework, highlighting the role of intrinsic parameters and radiation processes.

Findings

Successful simulation of 3C 279's SED in different states

Insights into synchrotron and inverse Compton contributions

Understanding of intrinsic jet parameters' effects

Abstract

We have observed 3C~279 in a gamma-ray flaring state in November 2008. We construct quasi-simultaneous spectral energy distributions (SEDs) of the source for the flaring period of 2008 and during a quiescent period in May 2010. Data have been compiled from observations with Fermi, Swift, RXTE, the VLBA, and various ground-based optical and radio telescopes. The objective is to comprehend the correspondence between the flux and polarization variations observed during these two time periods by carrying out a detailed spectral analyses of 3C~279 in the internal shock scenario, and gain insights into the role of intrinsic parameters and interplay of synchrotron and inverse Compton radiation processes responsible for the two states. As a first step, we have used a multi-slice time-dependent leptonic jet model, in the framework of the internal shock scenario, with radiation feedback to simulate the SED of 3C~279 observed in an optical high state in early 2006. We have used physical jet parameters obtained from the VLBA monitoring to guide our modeling efforts. We briefly discuss the effects of intrinsic parameters and various radiation processes in producing the resultant SED.