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March 29, 2026The Astrophysical JournalOpen Access

Ring Asymmetry and Spin in M87*

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Authors

VBVadim Y. BernshteynNCNicholas S. ConroyMBMichi Bauböck

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Overview

Observational data reveals spin constraints for M87*, indicating implications for black hole growth.

Key Points

  • The aim is to analyze the asymmetric ring of emission around M87* and its implications for black hole spin.
  • Utilized Event Horizon Telescope (EHT) images of M87*
  • Compared observed brightness asymmetry amplitudes with GRMHD model simulations
  • Assessed the effects of varying black hole spin on observed asymmetry
  • Three epochs of EHT data suggest a preference for ∣ a * ∣ ≳ 0.2 for strongly magnetized models.
  • Findings align with the Blandford–Znajek model indicating M87* has nonzero spin.
  • Future observations could yield improved constraints on black hole spin and jet-launching mechanisms.

Cite This Study

Bernshteyn et al. (2026) studied this question.

synapsesocial.com/papers/69c8c0b0de0f0f753b39b95ahttps://doi.org/10.3847/1538-4357/ae34af
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