A review of quasi-periodic oscillations from black hole X-ray binaries: observation and theory

AR Ingram, SE Motta - New Astronomy Reviews, 2019 - Elsevier
Black hole and neutron star X-ray binary systems routinely show quasi-periodic oscillations
(QPOs) in their X-ray flux. Despite being strong, easily measurable signals, their physical …

The quest for dual and binary supermassive black holes: A multi-messenger view

A De Rosa, C Vignali, T Bogdanović, PR Capelo… - New Astronomy …, 2019 - Elsevier
The quest for binary and dual supermassive black holes (SMBHs) at the dawn of the multi-
messenger era is compelling. Detecting dual active galactic nuclei (AGN)–active SMBHs at …

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 …

[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. 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 …

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 230 GHz have now imaged
polarized emission around the supermassive black hole in M87 on event-horizon scales …

Precessing jet nozzle connecting to a spinning black hole in M87

Y Cui, K Hada, T Kawashima, M Kino, W Lin, Y Mizuno… - Nature, 2023 - nature.com
The nearby radio galaxy M87 offers a unique opportunity to explore the connections
between the central supermassive black hole and relativistic jets. Previous studies of the …

[HTML][HTML] First M87 event horizon telescope results. IV. Imaging the central supermassive black hole

K Akiyama, A Alberdi, W Alef, K Asada… - The Astrophysical …, 2019 - iopscience.iop.org
We present the first Event Horizon Telescope (EHT) images of M87, using observations from
April 2017 at 1.3 mm wavelength. These images show a prominent ring with a diameter of∼ …

First M87 event horizon telescope results. V. Physical origin of the asymmetric ring

K Akiyama, A Alberdi, W Alef, K Asada… - The Astrophysical …, 2019 - iopscience.iop.org
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 …