67 citations · 88 across the 11 of their papers we have counts for
12 papers
Shaping the future of Global Interferometric Arrays: Imaging Strong Gravity and Magnetic Fields
Venkatessh Ramakrishnan, Violette Impellizzeri, Chi-Kwan Chan +7
The observational validation of General Relativity (GR) has been propelled in recent years by recent breakthroughs in Very Long Baseline Interferometry (VLBI) augmented by ALMA. We…
Full-polarization millimeter wavelength variability of Sagittarius A* during the 2018 EHT campaign
Ezequiel Albentosa-Ruiz, Jasmin E. Washington, Nicola Marchili +272
Sagittarius A* (Srg A*), the supermassive black hole at the center of the Milky Way, provides a unique laboratory to study accretion dynamics and plasma processes near the event ho…
Ring Asymmetry and Spin in M87*
Vadim Bernshteyn, Nicholas S. Conroy, Michi Bauböck +263
Event Horizon Telescope (EHT) images of the supermassive black hole M87* depict an asymmetric ring of emission. General relativistic magnetohydrodynamic (GRMHD) models of M87* and…
Probing jet base emission of M87* with the 2021 Event Horizon Telescope observations
Saurabh, Hendrik Müller, Sebastiano D. von Fellenberg +282
We investigate the presence and spatial characteristics of the jet base emission in M87* at 230 GHz, enabled by the enhanced uv coverage in the 2021 Event Horizon Telescope (EHT) o…
Event Horizon Telescope Pattern Speeds in the Visibility Domain
Nicholas S. Conroy, Michi Bauböck, Vedant Dhruv +6
The Event Horizon Telescope is preparing to produce time sequences of black hole images, or movies. In anticipation, we developed an autocorrelation technique to measure apparent r…
Origin of the ring ellipticity in the black hole images of M87*
Rohan Dahale, Ilje Cho, Kotaro Moriyama +273
We investigate the origin of the elliptical ring structure observed in the images of the supermassive black hole M87*, aiming to disentangle contributions from gravitational, astro…
First polarization study of the M87 jet and active galactic nuclei at submillimeter wavelengths with ALMA
Ciriaco Goddi, Douglas F. Carlos
We present full-polarization observations at mm (345 GHz) conducted with the Atacama Large Millimeter/submillimeter Array (ALMA) toward Messier 87 (M87) and seven other r…
Novel Polarimetric Analysis of Near Horizon Flaring Episodes in M87* in Millimeter Wavelength
Razieh Emami, Matthew Liska, Koushik Chatterjee +15
Recent multi-wavelength observations of M87* \citep{2024A&A...692A.140A} revealed a high-energy -ray flare without a corresponding millimeter counterpart. We present a theoretic…
Dynamical Inference from Polarized Light Curves of Sagittarius A*
Angelo Ricarte, Nicholas S. Conroy, Maciek Wielgus +3
Polarimetric light curves of Sagittarius A* (Sgr A*) sometimes exhibit loops in the Stokes and plane over time, often interpreted as orbiting hotspot motion. In this work,…
The 230 GHz Variability of Numerical Models of Sagittarius A* II. The Physical Origins of the Variability
Ho-Sang Chan, Chi-kwan Chan
We continue our previous work, Chan et al. 2024, to investigate how variations in the electron temperature prescription parameter, , influence the -hour variability…
Not all spacetime coordinates for general-relativistic ray tracing are created equal
Gabriele Bozzola, Chi-kwan Chan, Vasileios Paschalidis
Models for the observational appearance of astrophysical black holes rely critically on accurate general-relativistic ray tracing and radiation transport to compute the intensity m…
Monitoring the Morphology of M87* in 2009-2017 with the Event Horizon Telescope
Maciek Wielgus, Kazunori Akiyama, Lindy Blackburn +26
The Event Horizon Telescope (EHT) has recently delivered the first resolved images of M87*, the supermassive black hole in the center of the M87 galaxy. These images were produced…