The Event Horizon Telescope (EHT) recently released the first horizon-scale images of the black hole in M87. Combined with other astronomical data, these images constrain the mass and spin of the hole as well as the accretion rate and magnetic flux trapped on the hole. An important question for the EHT is how well key parameters, such as trapped magnetic flux and the associated disk models, can be extracted from present and future EHT VLBI data products. The process of modeling visibilities and analyzing them is complicated by the fact that the data are sparsely sampled in the Fourier domain while most of the theory/simulation is constructed in the image domain. Here we propose a data-driven approach to analyze complex visibilities and closure quantities for radio interferometric data with neural networks. Using mock interferometric data, we show that our neural networks are able to infer the accretion state as either high magnetic flux (MAD) or low magnetic flux (SANE), suggesting that it is possible to perform parameter extraction directly in the visibility domain without image reconstruction. We have applied VLBInet to real M87 EHT data taken on four different days in 2017 (April 5, 6, 10, 11), and our neural networks give a score prediction 0.52, 0.4, 0.43, 0.76 for each day, with an average score 0.53, which shows no significant indication for the data to lean toward either the MAD or SANE state.
Publications
Coherent control of a superconducting qubit using light.” https://arxiv.org/abs/2310.16155. Publisher's VersionAbstract
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Diné Entrepreneurship: Indigenous Contemporary Entrepreneurship.” Social Studies.Abstract
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Engineering Phonon-Qubit Interactions using Phononic Crystals.” https://arxiv.org/abs/2310.06236v1. Publisher's VersionAbstract
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High Q-factor diamond optomechanical resonators with silicon vacancy centers at millikelvin temperatures.” https://arxiv.org/abs/2310.18838. Publisher's VersionAbstract
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Learning Trust Over Directed Graphs in Multiagent Systems.” In 5th Annual Conference on Learning for Dynamics and Control, 211: Pp. 1-13.Abstract
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Submitted. Report of the Willows Impact Evaluation (WIE) Dissemination Meeting. Arusha, Tanzania: Kilimanjaro Christian Medical Center.
The effects of hemianopia on perception of mutual gaze.” Optom Vis Sci.
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Entanglement of Nanophotonic Quantum Memory Nodes in a Telecommunication Network.” https://arxiv.org/abs/2310.01316. Publisher's VersionAbstract
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Recommendations for the pharmacological management of neuropathic pain: an overview and literature update.” In Mayo Clinic Proceedings, 85: Pp. S3-S14. Elsevier.
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