Black hole accretion flows can be divided into two broad classes: cold and hot. Whereas
cold accretion flows consist of cool optically thick gas and are found at relatively high mass …

The spin of a black hole retains the memory of how the black hole grew, and can be a potent
source of energy for powering relativistic jets. To understand the diagnostic power and …

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 …

First Sagittarius A* Event Horizon Telescope Results. III. Imaging of the Galactic Center
Supermassive Black Hole - IOPscience Skip to content IOP Science home Accessibility Help …

In this paper we quantify the temporal variability and image morphology of the horizon-scale
emission from Sgr A*, as observed by the EHT in 2017 April at a wavelength of 1.3 mm. We …

First Sagittarius A* Event Horizon Telescope Results. I. The Shadow of the Supermassive
Black Hole in the Center of the Milky Way - IOPscience Skip to content IOP Science home …

Abstract We present Event Horizon Telescope (EHT) 1.3 mm measurements of the radio
source located at the position of the supermassive black hole Sagittarius A*(Sgr A*) …

First M87 Event Horizon Telescope Results. III. Data Processing and Calibration - IOPscience
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Abstract The Event Horizon Telescope (EHT) is a very long baseline interferometry (VLBI)
array that comprises millimeter-and submillimeter-wavelength telescopes separated by …

We present Event Horizon Telescope (EHT) 1.3 mm measurements of the radio source
located at the position of the supermassive black hole Sagittarius A*(Sgr A*), collected …