Calculating black hole shadows: Review of analytical studies

V Perlick, OY Tsupko - Physics Reports, 2022 - Elsevier
In this article, we provide a review of the current state of the research of the black hole
shadow, focusing on analytical (as opposed to numerical and observational) studies. We …

[HTML][HTML] The origins of massive black holes

M Volonteri, M Habouzit, M Colpi - Nature Reviews Physics, 2021 - nature.com
Massive black holes (MBHs) inhabit galactic centres, and power luminous quasars and
active galactic nuclei, shaping their cosmic environment with the energy they produce. The …

First Sagittarius A* event horizon telescope results. VI. Testing the black hole metric

K Akiyama, A Alberdi, W Alef, JC Algaba… - The Astrophysical …, 2022 - iopscience.iop.org
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 …

Horizon-scale tests of gravity theories and fundamental physics from the Event Horizon Telescope image of Sagittarius A

S Vagnozzi, R Roy, YD Tsai, L Visinelli… - … and Quantum Gravity, 2023 - iopscience.iop.org
Horizon-scale images of black holes (BHs) and their shadows have opened an
unprecedented window onto tests of gravity and fundamental physics in the strong-field …

First Sagittarius A* event horizon telescope results. IV. Variability, morphology, and black hole mass

K Akiyama, A Alberdi, W Alef, JC Algaba… - The Astrophysical …, 2022 - iopscience.iop.org
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 …

[HTML][HTML] First Sagittarius A* Event Horizon Telescope results. I. The shadow of the supermassive black hole in the center of the Milky Way

K Akiyama, A Alberdi, W Alef, JC Algaba… - The Astrophysical …, 2022 - iopscience.iop.org
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 …

First Sagittarius A* event horizon telescope results. II. EHT and multiwavelength observations, data processing, and calibration

K Akiyama, A Alberdi, W Alef, JC Algaba… - The Astrophysical …, 2022 - iopscience.iop.org
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. VIII. Magnetic field structure near the event horizon

K Akiyama, JC Algaba, A Alberdi, W Alef… - The Astrophysical …, 2021 - iopscience.iop.org
Abstract Event Horizon Telescope (EHT) observations at 230GHz have now imaged
polarized emission around the supermassive black hole in M87 on event-horizon scales …

First M87 event horizon telescope results. VII. Polarization of the ring

K Akiyama, JC Algaba, A Alberdi, W Alef… - The Astrophysical …, 2021 - iopscience.iop.org
Abstract In 2017 April, the Event Horizon Telescope (EHT) observed the near-horizon region
around the supermassive black hole at the core of the M87 galaxy. These 1.3 mm …

A ring-like accretion structure in M87 connecting its black hole and jet

RS Lu, K Asada, TP Krichbaum, J Park, F Tazaki… - Nature, 2023 - nature.com
The nearby radio galaxy M87 is a prime target for studying black hole accretion and jet
formation,. Event Horizon Telescope observations of M87 in 2017, at a wavelength of 1.3 …