Hot spots, or plasmoids, which form due to magnetic reconnection in current sheets, are
conjectured to power frequent X-ray and near-infrared flares from Sgr A*, the black hole in …

The accretion flow around the Galactic Centre black hole Sagittarius A*(Sgr A*) is expected
to have an electron temperature that is distinct from the ion temperature, due to weak …

Nonthermal electron acceleration via magnetic reconnection is thought to play an important
role in powering the variable X-ray emission from radiatively inefficient accretion flows …

One of the main dissipation processes acting on all scales in relativistic jets is thought to be
governed by magnetic reconnection. Such dissipation processes have been studied in …

We report the time-resolved spectral analysis of a bright near-infrared and moderate X-ray
flare of Sgr A⋆. We obtained light curves in the M, K, and H bands in the mid-and near …

High-resolution near-infrared observations with GRAVITY instrument have revealed rapid
orbital motions of a hotspot around Sagittarius A*(Sgr A*), the supermassive black hole in …

Magnetic reconnection is thought to be one of the main energy-dissipation mechanisms
fueling energy to the plasma in the vicinity of a black hole. Indeed, plasmoids formed …

In this work, a time-dependent modelling is developed to study the emission properties of
blazars in the low state. Motivated by various observations, we speculate and assume that …

Quasi-periodic eruptions (QPEs) are an extreme X-ray variability phenomenon associated
with low-mass (M BH< 10 7 M⊙) supermassive black holes (SMBHs). First discovered in the …

We report a timing analysis of near-infrared (NIR), X-ray, and submillimeter data during a 3
day coordinated campaign observing Sagittarius A*. Data were collected at 4.5 μm with the …