Reaching the Peak of the quasar spectral energy distribution - II. Exploring the accretion disc, dusty torus and host galaxy

Understand

We continue our study of the spectral energy distributions (SEDs) of 11 AGN at 1.5 < z < 2.2, with optical-NIR spectra, X-ray data and mid-IR photometry.

• In a previous paper we presented the observations and models; in this paper we explore the parameter space of these models.
• We first quantify uncertainties on the black hole masses (M$_{\rm BH}$) and degeneracies between SED parameters.
• The effect of BH spin is tested, and we find that while low to moderate spin values (a$_*$ $\leq$ 0.9) are compatible with the data in all cases, maximal spin (a$_*$ = 0.998) can only describe the data if the accretion disc is face-on.