Abstract Details

Name: Bhargav Vaidya
Affiliation: IIT Indore
Conference ID: ASI2020_188
Title : Dissecting AGN jets through simulations in the era of multi-messenger Astronomy
Authors and Co-Authors : Bhargav Vaidya
Abstract Type : Invited
Abstract Category : Plenary
Abstract : Jets from Active Galactic nuclei (AGNs) are important from the point of view of feedback they provide to their surrounding. Further, emission from such jets cover a multi-wavelength band from radio to energetic gamma rays. Understanding the spectral distribution will enable us to get a comprehensive picture of physical processes in these jets and provide clues of their launching mechanism and their collimated nature . Recently, a breakthrough in the discovery of neutrinos from a blazar source using the IceCube experiments (IceCube Collaboration et al., 2018) has ushered the research of AGNs into a new era of multi-messenger astronomy. Such a discovery has far reaching implications in our understanding of the jet composition. By gathering information from multiple messengers, one could develop a more coherent physical picture of these sources. Thus, from the perspective of multi-messenger astronomy, jets from AGNs form an ideal laboratory. An appropriate bridge between models and observations is imperative to connect the pieces of information and gather physical insights from multiple messengers associated with these jets. The biggest challenge in the numerical simulation of AGN jets is its multi-scalar nature and it requires computational approach for a deeper understanding of complex interplay between various micro-physical processes that contribute in these astrophysical systems at various scales. In this talk, I will our describe our recent results on simulating AGN jets at various lengths scales with a focus on bridging the small scale plasma processes to macro-physical scales relevant for astrophysical systems. The talk will also focus on different processes that play a crucial role in accelerating particles in these systems viz. diffusive shock acceleration. stochastic acceleration and magnetic re-connection. Further, I will demonstrate the applicability of a hybrid framework to explain non-thermal emission and polarisation signatures from relativistic jets typically observed from AGNs.