Red quasars: estimation of SMBH spin, mass and accretion disk inclination angle

TL;DR

This study estimates the spin, mass, and inclination angles of 42 red quasars, revealing potential thick disks and retrograde rotation in some, and suggesting the population includes Seyfert galaxies and NLS1s.

Contribution

First to systematically estimate SMBH spin, mass, and inclination for a sample of 42 red quasars, identifying unique disk geometries and rotation directions.

Findings

Two quasars may have geometrically thick disks.

Six quasars may exhibit retrograde rotation.

Red quasar population includes Seyfert galaxies and NLS1s.

Abstract

We estimated values of spin, mass and inclination angle for sample of 42 red quasars. Our estimations show that 2 objects: F2MS~J1113+1244 and F2MS~J1434+0935 with highest Eddington ratios may have geometrically thick disk. Six objects: SDSS~J0036-0113, S82X~0040+0058, S82X~0118+0018, S82X~0303-0115, FBQS~J1227+3214, S82X~2328-0028 may have "retrograde" rotation. Analysis of estimated spin values shows that red quasar population may contain Seyfert galaxies and NLS1.