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We show how Event Horizon Telescope (EHT) observations of the supermassive object at the center of M87 can constrain deviations from General Relativity (GR) in a relatively model-independent way. We focus on the class of theories whose…

General Relativity and Quantum Cosmology · Physics 2020-08-26 Markus Rummel , C. P. Burgess

The Event Horizon Telescope recently observed the first shadow of a black hole. Images like this can potentially be used to test or constrain theories of gravity and deepen the understanding in plasma physics at event horizon scales, which…

High Energy Astrophysical Phenomena · Physics 2020-05-28 Jeffrey van der Gucht , Jordy Davelaar , Luc Hendriks , Oliver Porth , Hector Olivares , Yosuke Mizuno , Christian M. Fromm , Heino Falcke

Overlapping signals represent one of the major data analysis challenges in next-generation gravitational wave detectors. We leverage Transformers and Normalizing Flows, state-of-the-art machine learning algorithms, to address the parameter…

General Relativity and Quantum Cosmology · Physics 2025-05-06 Lucia Papalini , Federico De Santi , Massimiliano Razzano , Ik Siong Heng , Elena Cuoco

We propose a simple, analytic dual-cone accretion model for horizon scale images of the cores of Low-Luminosity Active Galactic Nuclei (LLAGN), including those observed by the Event Horizon Telescope (EHT). Our underlying model is of…

High Energy Astrophysical Phenomena · Physics 2025-11-27 Dominic O. Chang , Michael D. Johnson , Paul Tiede , Daniel C. M. Palumbo

Black holes hold a tremendous discovery potential. In this paper the extent to which the Event Horizon Telescope and its next generation upgrade can resolve their structure is quantified. Black holes are characterized by a perfectly…

General Relativity and Quantum Cosmology · Physics 2022-11-16 Raúl Carballo-Rubio , Vitor Cardoso , Ziri Younsi

This paper proposes a method for generating images of customized objects specified by users. The method is based on a general framework that bypasses the lengthy optimization required by previous approaches, which often employ a per-object…

Computer Vision and Pattern Recognition · Computer Science 2023-04-06 Xuhui Jia , Yang Zhao , Kelvin C. K. Chan , Yandong Li , Han Zhang , Boqing Gong , Tingbo Hou , Huisheng Wang , Yu-Chuan Su

Light passing near a black hole can follow multiple paths from an emission source to an observer due to strong gravitational lensing. Photons following different paths take different amounts of time to reach the observer, which produces an…

High Energy Astrophysical Phenomena · Physics 2024-11-25 George N. Wong , Lia Medeiros , Alejandro Cárdenas-Avendaño , James M Stone

This paper presents an interdisciplinary effort aiming to develop and share sustainable knowledge necessary to analyze, understand, and use published scientific results to advance reproducibility in multi-messenger astrophysics.…

Instrumentation and Methods for Astrophysics · Physics 2022-05-23 Ria Patel , Brandan Roachell , Silvina Caino-Lores , Ross Ketron , Jacob Leonard , Nigel Tan , Duncan Brown , Ewa Deelman , Michela Taufer

High-speed vision sensing is essential for real-time perception in applications such as robotics, autonomous vehicles, and industrial automation. Traditional frame-based vision systems suffer from motion blur, high latency, and redundant…

Computer Vision and Pattern Recognition · Computer Science 2025-07-10 Riadul Islam , Joey Mulé , Dhandeep Challagundla , Shahmir Rizvi , Sean Carson

General relativity predicts that images of optically thin accretion flows around black holes should generically have a ``photon ring,'' composed of a series of increasingly sharp subrings that correspond to increasingly strongly lensed…

High Energy Astrophysical Phenomena · Physics 2022-10-26 Paul Tiede , Michael D. Johnson , Dominic W. Pesce , Daniel C. M. Palumbo , Dominic O. Chang , Peter Galison

The Event Horizon Telescope Collaboration (EHTC) has presented first - dynamic-range limited - images of the black hole shadows in M87 and Sgr A*. The next generation Event Horizon Telescope (ngEHT) will provide higher sensitivity and…

High Energy Astrophysical Phenomena · Physics 2023-03-14 Bidisha Bandyopadhyay , Christian Fendt , Dominik R. G. Schleicher , Javier Lagunas , Javier Pedreros , Neil M. Nagar , Felipe Agurto

Autoencoders have been extensively used in the development of recent anomaly detection techniques. The premise of their application is based on the notion that after training the autoencoder on normal training data, anomalous inputs will…

Machine Learning · Computer Science 2024-03-29 Amin Ghafourian , Huanyi Shui , Devesh Upadhyay , Rajesh Gupta , Dimitar Filev , Iman Soltani Bozchalooi

Event Horizon Telescope (EHT) observations have revealed a bright ring of emission around the supermassive black hole at the center of the M87 galaxy. EHT images in linear polarization have further identified a coherent spiral pattern…

High Energy Astrophysical Phenomena · Physics 2023-11-21 The Event Horizon Telescope Collaboration

Recent observations by the Event Horizon Telescope (EHT) of supermassive black holes M87* and Sgr A* offer valuable insights into their spacetime properties and astrophysical conditions. Utilizing a library of model images (~2 million for…

High Energy Astrophysical Phenomena · Physics 2024-09-25 A. I. Yfantis , S. Zhao , R. Gold , M. Mościbrodzka , A. E. Broderick

The EHT has captured a series of images of black holes. These images could provide valuable information about the gravitational environment near the event horizon. However, accurate detection and parameter estimation for candidate black…

Instrumentation and Methods for Astrophysics · Physics 2024-08-16 Yeqi Fang , Wei Hong , Jun Tao

The Event Horizon Telescope (EHT) recently released the first linearly polarized images of the accretion flow around the supermassive black hole Messier 87*, hereafter \m{}. The spiraling polarization pattern found in EHT images favored…

High Energy Astrophysical Phenomena · Physics 2022-04-20 Daniel C. M. Palumbo , George N. Wong

While supermassive black hole masses have been cataloged across cosmic time, only a few dozen of them have robust spin measurements. By extending and improving the existing Event Horizon Telescope (EHT) array, the next-generation Event…

High Energy Astrophysical Phenomena · Physics 2022-11-09 Angelo Ricarte , Paul Tiede , Razieh Emami , Aditya Tamar , Priyamvada Natarajan

Event Horizon Telescope (EHT) observations at 230 GHz have now imaged polarized emission around the supermassive black hole in M87 on event-horizon scales. This polarized synchrotron radiation probes the structure of magnetic fields and the…

High Energy Astrophysical Phenomena · Physics 2021-05-06 The Event Horizon Telescope Collaboration

The Event Horizon Telescope (EHT) Collaboration has recently published the first horizon-scale images of the supermassive black holes M87* and Sgr A* and provided some first information on the physical conditions in their vicinity. The…

High Energy Astrophysical Phenomena · Physics 2023-11-20 Kotaro Moriyama , Alejandro Cruz-Osorio , Yosuke Mizuno , Christian M. Fromm , Antonios Nathanail , Luciano Rezzolla