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Mid-Range Science Objectives for the Event Horizon Telescope
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The first images of the black holes in Sagittarius A* and M87* have created a wide range of new scientific opportunities in gravitational physics, compact objects, and relativistic astrophysics. We discuss here the scientific opportunities that arise from the rich data sets that have already been obtained and the new data sets that will be obtained, exploiting a wide range of technical advances, including observational agility, receiver upgrades, and the addition of new stations. This document provides a 5-year framework for Event Horizon Telescope (EHT) science structured around four fundamental questions that are used to prioritize the analysis of existing data, guide technical upgrades, and determine the optimal use of future observational opportunities with EHT, ALMA, and multi-wavelength facilities. Through enhancements over this period, the EHT will create the first movie of M87* connecting black hole and jet physics, provide detailed studies of the structure and dynamics of Sgr A*, characterize the magnetospheres of both systems through polarimetric imaging, and explore the spacetime properties of black holes with greater precision and range.
Forward citations
Cited by 5 Pith papers
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Dynamics and geometry of the inner sub-parsec-scale jet in 3C 279 observed with the Event Horizon Telescope
EHT 2021 images of 3C 279 reveal an intrinsic, sideways-elongated jet base whose components move at apparent speeds up to 10c, implying a sub-parsec bend toward the observer and viewing angles below one degree.
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Deep learning inference with the Event Horizon Telescope II. The Zingularity framework for Bayesian artificial neural networks
Bayesian neural networks trained on synthetic EHT observations of Sgr A* and M87* recover spin and magnetic state well in cross-code tests, but give overconfident wrong estimates for temperature ratio and inclination ...
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Characteristic precessions of spherical orbit around a rotating braneworld black hole
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