The dynamics of charged particles in electromagnetic fields is an essential component of
understanding the most extreme environments in our Universe. In electromagnetic fields of …

Abstract The Event Horizon Telescope (EHT) has mapped the central compact radio source
of the elliptical galaxy M87 at 1.3 mm with unprecedented angular resolution. Here we …

There is a broad consensus that accretion onto supermassive black holes and consequent
jet formation power the observed emission from active galactic nuclei (AGNs). However …

No. All theoretical predictions for the observational appearance of an accreting
supermassive black hole, as measured interferometrically by a sparse Earth-sized array at …

Since the invention of chirped pulse amplification, which was recognized by a Nobel Prize in
physics in 2018, there has been a continuing increase in available laser intensity. Combined …

Abstract The Event Horizon Telescope (EHT) provides the unprecedented ability to directly
resolve the structure and dynamics of black hole emission regions on scales smaller than …

Accreting black holes produce collimated outflows, or jets, that traverse many orders of
magnitude in distance, accelerate to relativistic velocities, and collimate into tight opening …

Black holes are known to launch powerful relativistic jets and emit highly variable gamma
radiation. How these jets are loaded with plasma remains poorly understood. Spark gaps …

Context. The origin of ultra-rapid flares of very high-energy radiation from active galactic
nuclei remains elusive. Magnetospheric processes, occurring in the close vicinity of the …

Context. Markarian 501 (Mrk 501) is a very high-energy (VHE) gamma-ray blazar located at
z= 0.034, which is regularly monitored by a wide range of multi-wavelength instruments …