Abstract
In this article, first the author present a short historical introduction to the discovery of extragalactic jets in active galactic nuclei (AGN), followed by a brief overview of their observational properties which lead to their various classifications and a unification scheme based on the viewing geometry of jets in the AGN. The author largely focus on the studies of multi-wavelength emissions and modeling of spectral energy distribution of AGN, which are dominated by emission from jets, namely, blazars. The author present a few new results from the studies of a few blazars based mostly on observations with the AstroSat. The author ends with an overview of the role played by the radio jets in clusters of galaxies in creating various interesting features in the hot gas, and feedback and regulation of heating and cooling in the cores of the hot gas.
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Acknowledgements
The author thank the authors of many publications cited here for the use of images and graphs shown here. He also thank G. C. Dewangan and S. Chandra for the plots provided by them ahead of their publications. The author thank the organisers of the Workshop on ‘Astrophysical jets and observational facilities: National perspective’ held on 5–9 April 2021 at ARIES, Nainital, for inviting the author to speak on the subject title, and on which this article is based. He thank the Indian National Science Academy for support under the INSA Senior Scientist Programme.
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This article is part of the Special Issue on “Astrophysical Jets and Observational Facilities: A National Perspective.”
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Singh, K.P. Jets from active galactic nuclei. J Astrophys Astron 43, 85 (2022). https://doi.org/10.1007/s12036-022-09861-4
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DOI: https://doi.org/10.1007/s12036-022-09861-4