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5 papers

astro-ph.HE2026

Signatures of Black Hole Spin in Horizon-Scale Polarimetry

George N. Wong, Daniel C. M. Palumbo, Zachary Gelles +1

The paper investigates how the spin of a black hole influences polarized emission observed at event‑horizon scales with VLBI, separating effects due to photon propagation in Kerr s…

astro-ph.HE2026

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…

astro-ph.HE2025

Black Hole Polarimetry II: The Connection Between Spin and Polarization

George N. Wong, Andrew Chael, Alexandru Lupsasca +1

We study synchrotron polarization in spatially resolved horizon-scale images, such as those produced by the Event Horizon Telescope (EHT). In both general relativistic magnetohydro…

astro-ph.HE2025

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…

astro-ph.GA2025

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…