A 25-year Chandra catalog of 100 Sgr A* X-ray flares confirms that brighter flares are spectrally harder and strengthens prior correlations with duration and fluence.
Akiyama et al
10 Pith papers cite this work. Polarity classification is still indexing.
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Machine learning on simulated images identifies that flux eruption events cause more diffuse, polarized, lower-flux millimeter emission with decreased Q-U loop rotation rate, achieving ~80% accuracy with random forests on summary statistics.
A new complete gauge fixing at initial data via Hodge decomposition on complete Riemannian manifolds enables existence proofs for Hadamard states in the quantization of Maxwell theory on globally hyperbolic Lorentzian manifolds.
Derives an electrically charged generalization of the Kiselev black hole metric and studies charged particle orbits, finding prograde periapsis shifts for uncharged particles but possible retrograde shifts for charged ones.
Some opacity in black hole imaging methods is compatible with reliable inference under specified conditions, but GRMHD models of Sgr A* exhibit problematic opacity that signals model limitations.
Simulations of accreting black holes in standard and complex spacetimes indicate that magnetic geometry, quantum corrections, and binary dynamics influence flares, precession, photon rings, and multi-wavelength variability, with potential EHT constraints.
Synthetic EHT data from semi-analytic jet models show that the 2022 array configuration enables robust recovery of faint horizon-scale jet emission in M87* when jet intensity exceeds a determined lower limit.
EHT angular diameter data yield upper bounds on the holonomy correction b (e.g., b ≤ 0.1319M at a=0 for M87*) showing nonzero b remains consistent with observations for RHCBH spacetimes.
Bardeen-like black holes produce ℓ-dependent corrections to weak-field deflection and strong-field lensing observables that remain consistent with observations but may distinguish them from Schwarzschild black holes.
citing papers explorer
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The Demographics of Sagittarius A* X-ray Flares over 25 Years with Chandra
A 25-year Chandra catalog of 100 Sgr A* X-ray flares confirms that brighter flares are spectrally harder and strengthens prior correlations with duration and fluence.
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Identifying Observational Signatures of Flux Eruption Events in Supermassive Black Hole Accretion Flows with Machine Learning
Machine learning on simulated images identifies that flux eruption events cause more diffuse, polarized, lower-flux millimeter emission with decreased Q-U loop rotation rate, achieving ~80% accuracy with random forests on summary statistics.
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On the Quantisation of Linear Gauge Theories on Lorentzian Manifolds: Maxwell's Theory via Complete Gauge Fixing
A new complete gauge fixing at initial data via Hodge decomposition on complete Riemannian manifolds enables existence proofs for Hadamard states in the quantization of Maxwell theory on globally hyperbolic Lorentzian manifolds.
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Particle dynamics around an electrically charged Kiselev black hole embedded in quintessence
Derives an electrically charged generalization of the Kiselev black hole metric and studies charged particle orbits, finding prograde periapsis shifts for uncharged particles but possible retrograde shifts for charged ones.
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Black Boxes in Black Hole Imaging
Some opacity in black hole imaging methods is compatible with reliable inference under specified conditions, but GRMHD models of Sgr A* exhibit problematic opacity that signals model limitations.
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GRMHD and GRRT Simulations of Black Hole Accretion: Flares, Precession, and Complex Spacetimes
Simulations of accreting black holes in standard and complex spacetimes indicate that magnetic geometry, quantum corrections, and binary dynamics influence flares, precession, photon rings, and multi-wavelength variability, with potential EHT constraints.
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Constraining the jet base emission of M87* with past and future Event Horizon Telescope observations
Synthetic EHT data from semi-analytic jet models show that the 2022 array configuration enables robust recovery of faint horizon-scale jet emission in M87* when jet intensity exceeds a determined lower limit.
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Testing loop quantum gravity through EHT observations of M87* and Sgr A* using rotating holonomy-corrected black holes
EHT angular diameter data yield upper bounds on the holonomy correction b (e.g., b ≤ 0.1319M at a=0 for M87*) showing nonzero b remains consistent with observations for RHCBH spacetimes.
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Distinguish Bardeen-like black holes by Gravitational lensing
Bardeen-like black holes produce ℓ-dependent corrections to weak-field deflection and strong-field lensing observables that remain consistent with observations but may distinguish them from Schwarzschild black holes.
- Circular polarization images of Sgr A* for different magnetic field geometries