Radio and gamma-ray loud narrow-line Seyfert 1 galaxies in the spotlight

Abstract

Narrow-line Seyfert 1 (NLS1) galaxies provide us with unique insights into the drivers of AGN activity under extreme conditions. Given their low black hole (BH) masses and near-Eddington accretion rates, they represent a class of galaxies with rapidly growing supermassive BHs in the local universe. Here, we present the results from our multi-frequency radio monitoring of a sample of γ-ray loud NLS1 galaxies (γNLS1s), including systems discovered only recently, and featuring both the nearest and the most distant γNLS1s known to date. We also present high-resolution radio imaging of 1H 0323+342, which is remarkable for its spiral or ring-like host. Finally, we present new radio data of the candidate γ-emitting NLS1 galaxy RX J2314.9+2243, characterized by a very steep radio spectrum, unlike other γNLS1s.

4 pages, 1 figure. Accepted for publication in the Proceedings of the IAU Symposium No. 324: New Frontiers in Black Hole Astrophysics

References in corpus (8)

• MOJAVE: Monitoring of Jets in AGN with VLBA Experiments. V. Multi-epoch VLBA Images
• A Comprehensive Study of 2 000 Narrow Line Seyfert 1 Galaxies from the Sloan Digital Sky Survey: I. The Sample
• Radio-loud Narrow-Line Type 1 Quasars
• On the nature of Seyfert galaxies with high [OIII]5007 blueshifts
• A narrow line Seyfert 1--blazar composite nucleus in 2MASX J0324+3410
• RoboPol: The optical polarization of gamma-ray--loud and gamma-ray--quiet blazars
• The host-galaxy of the gamma-ray Narrow-line Seyfert 1 galaxy 1H~0323+342
• Multifrequency studies of the narrow-line Seyfert 1 galaxy SBS 0846+513