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Probing Physics of Relativistic Jets and High Energy Emission Mechanisms through Multi-wavelength Data and Modeling

Dr. Pankaj Kushwaha (Faculty Candidate), ARIES, Nainital, India

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Relativistic plasma jets are ubiquitous in astrophysical systems hosting accreting black holes and have been observed in a wide range of systems from mildly- or highly-relativistic jets in micro-quasars and active galactic nuclei to ultra-relativistic ones in gamma-ray bursts. The most powerful, persistent, and dynamic jets are hosted by active galactic nuclei (AGNs) called blazars – a subclass of AGNs with a relativistic jet oriented at small angles to our line of sight. They are known for their extreme and high activities in all the domains of observations with emission from radio to GeV/TeV gamma-rays (~ 17-20 orders of magnitude), variable on timescales from minutes and even less to decades (~ 6-7 orders of magnitude), high and variable radio and optical polarization (~0-50%), and jets extending up to Mpc scales (~ 9-13 orders of magnitude). Though we have a general understanding of relevant physical processes and emission mechanisms, almost all the fundamental aspects from jet launching, collimation, to propagation and particle acceleration to ultra-relativistic energies are poorly understood and constrained. I will present my work exploring jet physics through studies focused on high energy emission mechanisms, statistical properties of variability, jet dynamics, and particle acceleration, and connection between the central engine and the jet using multi-wavelength data and modeling. Finally, I will discuss the potential of these sources in cross-domain studies, .e.g cosmology, astroparticle physics, and cosmic-rays, and discuss a few of our ongoing projects in this direction.

Meeting ID: 969 8056 5950
Passcode: 632619
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