Radio-loud Narrow Line Seyfert 1 under a different perspective: a revised black hole mass estimate from optical spectropolarimetry

Ranieri D. Baldi, Alessandro Capetti, Andrew Robinson +2

Several studies indicate that radio-loud (RL) Active Galactic Nuclei (AGN) are produced only by the most massive black holes (BH), $M_{\mathrm{BH}}\sim 10^8$-$10^{10}{M}_{\odot }$. This id…