We postulate that supermassive black-holes grow in the centers of galaxies until they unbind the galactic gas that feeds them. We show that the corresponding self-regulation condition yields a correlation between black-hole mass (Mbh) and galaxy velocity dispersion (σ) as inferred in the local universe, and recovers the observed optical and X-ray luminosity functions of quasars at redshifts up ...

Motivated by recent observational results that focus on high-redshift black holes, we explore the effect of scatter and observational biases on the ability to recover the intrinsic properties of the black hole population at high redshift. We find that scatter and selection biases can hide the intrinsic correlations between black holes and their hosts, with ‘observable’ subsamples of the whole p...

From a sample of 50 predominantly inactive galaxies with direct supermassive black hole mass measurements, it has recently been established that barred galaxies tend to reside rightward of the Mbh-σ relation defined by non-barred galaxies. Either black holes in barred galaxies tend to be anaemic or the central velocity dispersions in these galaxies have a tendency to be elevated by the presence...

Aims. Type II AGNs with polarimetric broad emission line provided strong evidence for the orientation-based unified model for AGNs. We want to investigate whether the polarimetric broad emission line in type II AGNs can be used to calculate their central supermassive black hole (SMBH) masses, like that for type I AGNs. Methods. We collected 12 type II AGNs with polarimetric broad emission line ...

We develop an orbital-dependent potential to describe electron-hole interaction in materials with structural 2D character, i.e. quasi-2D materials. The modulated orbital-dependent potentials are also constructed with non-local screening, multi-layer screening, and finite gap due to the coupling with substrates. We apply the excitonic Hamiltonian in coordinate-space with developed effective elec...

We present black hole mass–bulge velocity dispersion relation for a complete sample of 75 soft X-ray selected AGNs: 43 broad line Seyfert 1s and 32 narrow line Seyfert 1s. We use luminosity and FWHM(Hβ) as surrogates for black hole mass and FWHM([OIII]) as a surrogate for the bulge velocity dispersion. We find that NLS1s lie below the MBH–σ relation of BLS1s, confirming the Mathur et al. (2001)...

We show that under variation of moduli fields φ the first law of black hole thermodynamics becomes dM = κdA 8π + ΩdJ +ψdq+χdp−Σdφ, where Σ are the scalar charges. We also show that the ADM mass is extremized at fixed A, J , (p, q) when the moduli fields take the fixed value φfix(p, q) which depend only on electric and magnetic charges. It follows that the least mass of any black hole with fixed...