A novel black-hole mass scaling relation based on coronal gas, and its dependence with the accretion disc

M. Almudena Prieto; Alberto Rodríguez-Ardila; Swayamtrupta Panda; Murilo Marinello

doi:10.1093/mnras/stab3414

paper

A novel black-hole mass scaling relation based on coronal gas, and its dependence with the accretion disc

arXiv:2111.10465 · doi:10.1093/mnras/stab3414

Abstract

Using bona-fide black hole (BH) mass estimates from reverberation mapping and the line ratio [SiVI] 1.963 $μ$ m/Br $γ_{broad}$ as tracer of the AGN ionising continuum, a novel BH-mass scaling relation of the form log( $M_{BH}) = (6.40 \pm 0.17) - (1.99 \pm 0.37) \times$ log ([SiVI]/Br $γ_{broad})$ , dispersion 0.47 dex, over the BH mass interval, $1 0^{6} - 1 0^{8}$ M $_{⊙}$ is found. Following on the geometrically thin accretion disc approximation and after surveying a basic parameter space for coronal lines production, we believe one of main drivers of the relation is the effective temperature of the disc, which is effectively sampled by the [SiVI] 1.963 $μ$ m coronal line for the range of BH masses considered. By means of CLOUDY photoionisation models, the observed anti-correlation appears to be formally in line with the thin disc prediction T_disc $\propto M_{BH}^{- 1/4}$ .

arXiv comment22 pages, 16 figures. Accepted for publication in MNRAS. arXiv admin note: text overlap with arXiv:2010.00075

A novel black-hole mass scaling relation based on coronal gas, and its dependence with the accretion disc

Abstract

References in corpus (59)

Cited by in corpus (10)