Narrow-Line Seyfert 1 Galaxies Beyond the Local X-ray Universe: An X-ray spectral sample

Jiachen Jiang, Dominic J. Walton, Luigi C. Gallo +8

Narrow-line Seyfert 1 AGNs (NLS1s) represent a unique stage in the black hole growth history, characterised by low black hole masses of approximately $10^6$-$10^8$ solar masses…