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arXiv · 1909.01444

Gamma-ray Emitting Narrow-Line Seyfert 1 Galaxies: Past, Present, and Future

Vaidehi S. Paliya
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Abstract

This article reviews our current understanding about $γ$-ray detected narrow-line Seyfert 1 ($γ$-NLSy1) galaxies. The detection with the Large Area Telescope onboard {\it Fermi}~Gamma-ray Space Telescope has provided the strongest evidence for the presence of closely aligned relativistic jet in these intriguing active galactic nuclei (AGN) and opened up a realm to explore the physical conditions needed to launch the jet in a different central engine and host galaxy environment than that is known for blazars. Promising results acquired from various multi-wavelength campaigns are converging to a scenario in which the $γ$-NLSy1 galaxies can be considered as `young' blazars. These enigmatic sources hold the key to unravel the jet triggering mechanism and evolution of the AGN phase of a galaxy, in general. As such, $γ$-NLSy1s should be considered as one of the top priority targets for next generation observational facilities.

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Vaidehi S. Paliya. 2019-09-03. Gamma-ray Emitting Narrow-Line Seyfert 1 Galaxies: Past, Present, and Future. https://doi.org/10.1007/s12036-019-9604-3

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