We use local stratified shearing-box simulations to elucidate the impact of two-temperature
thermodynamics on the thermal structure of coronae in radiatively efficient accretion flows …

Abstract As Setti and Woltjer noted back in 1973, one can use quasars to construct the
Hubble diagram; however, the actual application of the idea was not that straightforward. It …

Surfaces of the Sun and other cool stars are filled with magnetic fields, which are either seen
as dark compact spots or more diffuse bright structures like faculae. Both hamper detection …

Abstract The AGN STORM 2 Collaboration targeted the Seyfert 1 galaxy Mrk 817 for a year-
long multiwavelength, coordinated reverberation mapping campaign including Hubble …

For many years we have known that dust in the form of a dusty-molecular torus is
responsible for the obscuration in active galactic nuclei (AGN) at large viewing angles and …

Abstract PG 1448+ 273 is a luminous, nearby (z= 0.0645), narrow-line Seyfert 1 galaxy,
which likely accretes close to the Eddington limit. XMM-Newton observations of PG 1448+ …

A decade ago, the archetypal Seyfert-1 galaxy NGC 5548 was discovered to have
undergone major spectral changes. The soft X-ray flux had dropped by a factor of 30 while …

In this paper, we study the role of radiative cooling (RC) in a two-fluid model consisting of
coupled neutrals and charged particles. We first analyse the linearized two-fluid equations …

Context. Accretion disk winds launched close to supermassive black holes (SMBHs) are a
viable mechanism providing feedback between the SMBH and the host galaxy. Aims. We …

Quasar winds can shock and sweep up ambient interstellar medium (ISM) gas, contributing
to galactic quenching. We combine and extend past models of energy-conserving shock …