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Supermassive Black Hole Spin Constraints from Polarimetry in an Equatorial Disk Model
Daniel C. M. Palumbo
The Event Horizon Telescope has released polarized images of the supermassive black holes Messier 87* (M87*) and Sagittarius A* (Sgr A*) accretion disks. As more images are produce…
Machine- and deep-learning-driven angular momentum inference from BHEX observations of the photon ring
Joseph R. Farah, Jordy Davelaar, Daniel Palumbo +2
The photon ring is an important probe of black hole (BH) properties and will be resolved by the Black Hole Explorer (BHEX) for the first time. However, extraction of black ho…
Photon ring polarimetry with next-generation black hole imaging I. M87*
Aditya Tamar, Daniel C. M. Palumbo
The near-horizon region of a black hole impacts linear (LP) and circular polarization (CP) through strong lensing of photons, adding large-scale symmetries and anti-symmetries to t…
Multi-messenger Probes of Supermassive Black Hole Spin Evolution
Angelo Ricarte, Priyamvada Natarajan, Ramesh Narayan +1
Using the semi-analytic model Serotina, we investigate the cosmic spin evolution of supermassive black holes incorporating recent results from general relativistic magnetohydrodyna…
First Very Long Baseline Interferometry Detections at 870μm
Alexander W. Raymond, Sheperd S. Doeleman, Keiichi Asada +276
The first very long baseline interferometry (VLBI) detections at 870m wavelength (345GHz frequency) are reported, achieving the highest diffraction-limited angular resolutio…
Prospects for the Detection of the Sgr A* Photon Ring with next-generation Event Horizon Telescope Polarimetry
Kaitlyn M. Shavelle, Daniel C. M. Palumbo
The Event Horizon Telescope (EHT) has imaged two supermassive black holes, Messier 87* (M87*) and Sagittarius A* (Sgr A*), using very-long-baseline interferometry (VLBI). The theor…