In this paper we provide a first physical interpretation for the Event Horizon Telescopeʼs
(EHT) 2017 observations of Sgr A*. Our main approach is to compare resolved EHT data at …

In this chapter, we review some features of particle acceleration in astrophysical jets. We
begin by describing four observational results relating to the topic, with particular emphasis …

Astrophysical black holes are expected to be described by the Kerr metric. This is the only
stationary, vacuum, axisymmetric metric, without electromagnetic charge, that satisfies …

The magnetic-field conditions in astrophysical relativistic jets can be probed by
multiwavelength polarimetry, which has been recently extended to X-rays. For example, one …

Magnetic reconnection in strongly magnetized astrophysical plasma environments is
believed to be the primary process for fast energy release and particle energization …

In this study, the gravitational deflection angle of photons in the weak field limit (or the weak
deflection angle) and shadow cast by the electrically charged and spherically symmetric …

In this paper we provide a first physical interpretation for the Event Horizon Telescope's
(EHT) 2017 observations of Sgr A*. Our main approach is to compare resolved EHT data at …

We study the electrodynamics of a kinetically mixed dark photon cloud that forms through
superradiance around a spinning black hole, and design strategies to search for the …

Magnetized turbulence and magnetic reconnection are often invoked to explain the
nonthermal emission observed from a wide variety of astrophysical sources. By means of …

The Event Horizon Telescope (EHT) has opened a new window on supermassive black
holes. With the advent of millimeter and submillimeter very long baseline interferometry …