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Signatures of Black Hole Spin in Horizon-Scale Polarimetry
George N. Wong, Daniel C. M. Palumbo, Zachary Gelles +1
The angular momentum of a black hole, usually expressed in terms of a dimensionless "spin," both shapes the strong-field spacetime and provides a reservoir of rotational energy tha…
Black Hole Polarimetry: Universal Polarization of Synchrotron Radiation at the Horizon
Andrew Chael, Alexandru Lupsasca, George N. Wong +2
Polarized images of a black hole encode the direction of electromagnetic energy flow near its event horizon. Measuring polarization from near-horizon emission can help determine wh…
Signatures of Black Hole Spin and Plasma Acceleration in Jet Polarimetry II: Off-Axis Jets
Zachary Gelles, Andrew Chael, Eliot Quataert
We analyze the polarization of optically thin, stationary, axisymmetric black hole jets at scales of order the light cylinder radius. Our work generalizes the face-on results of Ge…
Limb-Brightened Jet in M87 from Anisotropic Nonthermal Electrons
Yuh Tsunetoe, Dominic W. Pesce, Ramesh Narayan +5
Very long baseline interferometry observations reveal that relativistic jets like the one in M87 have a limb-brightened, double-edged structure. Analytic and numerical models strug…
Signatures of Black Hole Spin and Plasma Acceleration in Jet Polarimetry
Zachary Gelles, Andrew Chael, Eliot Quataert
We study the polarization of black hole jets on scales of and show that large spatial swings in the polarization occur at three characteristic distances from the…
Relativistic Signatures of Flux Eruption Events Near Black Holes
Zachary Gelles, Koushik Chatterjee, Michael Johnson +2
Images of supermassive black holes produced using very long baseline interferometry provide a pathway to directly observing effects of a highly curved spacetime, such as a bright `…
Bayesian Accretion Modeling: Axisymmetric Equatorial Emission in the Kerr Spacetime
Daniel C. M Palumbo, Zachary Gelles, Paul Tiede +4
The Event Horizon Telescope (EHT) has produced images of two supermassive black holes, Messier~87* (M 87*) and Sagittarius~A* (Sgr A*). The EHT collaboration used these images to i…
Orbital motion near Sagittarius A* -- Constraints from polarimetric ALMA observations
Maciek Wielgus, Monika Moscibrodzka, Jesse Vos +6
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/submillim…
The Polarized Image of a Synchrotron Emitting Ring of Gas Orbiting a Black Hole
Ramesh Narayan, Daniel C. M. Palumbo, Michael D. Johnson +237
Synchrotron radiation from hot gas near a black hole results in a polarized image. The image polarization is determined by effects including the orientation of the magnetic field i…
First M87 Event Horizon Telescope Results. VIII. Magnetic Field Structure near The Event Horizon
The Event Horizon Telescope Collaboration
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 synchrotr…
The Role of Adaptive Ray Tracing in Analyzing Black Hole Structure
Z. Gelles, B. S. Prather, D. C. M. Palumbo +3
The recent advent of the Event Horizon Telescope (EHT) has made direct imaging of supermassive black holes a reality. Simulated images of black holes produced via general relativis…