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 …

First Sagittarius A* event horizon telescope results. V. Testing astrophysical models of the galactic center black hole

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

First Sagittarius A* Event Horizon Telescope Results. VI: Testing the Black Hole Metric

Event Horizon Telescope Collaboration - arxiv preprint arxiv …, 2023 - arxiv.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 …

Orbital motion near Sagittarius A*-Constraints from polarimetric ALMA observations

M Wielgus, M Moscibrodzka, J Vos, Z Gelles… - Astronomy & …, 2022 - aanda.org
We report on the polarized light curves of the Galactic Center supermassive black hole
Sagittarius A*, obtained at millimeter wavelength with the Atacama Large Millimeter …

Millimeter light curves of Sagittarius A* observed during the 2017 Event Horizon Telescope campaign

M Wielgus, N Marchili, I Martí-Vidal… - The Astrophysical …, 2022 - iopscience.iop.org
Several years after its initial identification (Balick & Brown 1974), the radio source at the
center of our Galaxy, now associated with the supermassive black hole Sagittarius A*(Sgr …

Jets in magnetically arrested hot accretion flows: Geometry, power, and black hole spin-down

R Narayan, A Chael, K Chatterjee… - Monthly Notices of the …, 2022 - academic.oup.com
We present the results of nine simulations of radiatively inefficient magnetically arrested
discs (MADs) across different values of the black hole spin parameter a*:− 0.9,− 0.7,− 0.5 …

Formation of magnetically truncated accretion disks in 3D radiation-transport two-temperature GRMHD simulations

MTP Liska, G Musoke, A Tchekhovskoy… - The Astrophysical …, 2022 - iopscience.iop.org
Multiwavelength observations suggest that the accretion disk in the hard and intermediate
states of X-ray binaries (XRBs) and active galactic nucleus transitions from a cold, thin disk …

Flux eruption events drive angular momentum transport in magnetically arrested accretion flows

K Chatterjee, R Narayan - The Astrophysical Journal, 2022 - iopscience.iop.org
We evolve two high-resolution general relativistic magnetohydrodynamic simulations of
advection-dominated accretion flows around nonspinning black holes (BHs), each over a …

Precession-induced Variability in AGN Jets and OJ 287

S Britzen, M Zajaček, C Fendt, E Kun… - The Astrophysical …, 2023 - iopscience.iop.org
The combined study of the flaring of active galactic nuclei (AGNs) at radio wavelengths and
parsec-scale jet kinematics with Very Long Baseline Interferometry has led to the view that …

First Sagittarius A* Event Horizon Telescope Results. V. Testing Astrophysical Models of the Galactic Center Black Hole

V Ramakrishnan, T Savolainen… - Astrophysical Journal …, 2022 - research.aalto.fi
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 …