CHIBI is a new hierarchical Bayesian method for multifrequency synthesis radio imaging based on synchrotron spectral parametrization, demonstrated on VLBA MOJAVE data and simulated EHT observations of M87*.
Key Science Goals for the Next-Generation Event Horizon Telescope
8 Pith papers cite this work, alongside 112 external citations. Polarity classification is still indexing.
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GRMHD models show PA1 aligns with the approaching limb for high spins, enabling mild disfavoring of low spins and strong disfavoring of Earth-pointing spins in M87* from EHT data, with similar potential for Sgr A*.
Evolved stars with radii ≳500 R_⊙ in nuclear star clusters can eclipse mm radio cores of nearby radio-loud AGN with ~10% relative depth, recurrence times ≳10 years, and durations ~10 days, enabling inference of SMBH masses and NSC composition.
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.
GRMHD simulations at spins 0.9375 and 0.998 yield similar fluid properties and full-Stokes EHT images, indicating prior lower-spin runs remain representative for a ≳ 0.9375.
GPUmonty delivers a 12x speedup over grmonty by parallelizing superphoton operations on GPUs while keeping errors below 1% in tests against analytic solutions and prior codes.
Light deflection and photon orbits around Kerr-Sen black holes are modified by homogeneous and inhomogeneous plasma, with explicit comparisons to the vacuum case.
citing papers explorer
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Multifrequency Synthesis via CHIBI: Colorful Hierarchical Interferometric Bayesian Imaging
CHIBI is a new hierarchical Bayesian method for multifrequency synthesis radio imaging based on synchrotron spectral parametrization, demonstrated on VLBA MOJAVE data and simulated EHT observations of M87*.
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Ring Position Angles and Spin in M87* and Sgr A*
GRMHD models show PA1 aligns with the approaching limb for high spins, enabling mild disfavoring of low spins and strong disfavoring of Earth-pointing spins in M87* from EHT data, with similar potential for Sgr A*.
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Eclipses of Nearby Radio-Loud Galactic Nuclei by Stars in Nuclear Star Clusters
Evolved stars with radii ≳500 R_⊙ in nuclear star clusters can eclipse mm radio cores of nearby radio-loud AGN with ~10% relative depth, recurrence times ≳10 years, and durations ~10 days, enabling inference of SMBH masses and NSC composition.
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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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Observational Properties of Near-Maximally Spinning Supermassive Black Holes
GRMHD simulations at spins 0.9375 and 0.998 yield similar fluid properties and full-Stokes EHT images, indicating prior lower-spin runs remain representative for a ≳ 0.9375.
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$\texttt{GPUmonty}$: A GPU-accelerated relativistic Monte Carlo radiative transfer code
GPUmonty delivers a 12x speedup over grmonty by parallelizing superphoton operations on GPUs while keeping errors below 1% in tests against analytic solutions and prior codes.
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Gravitational lensing around a Kerr-Sen black hole in plasma background
Light deflection and photon orbits around Kerr-Sen black holes are modified by homogeneous and inhomogeneous plasma, with explicit comparisons to the vacuum case.
- Sensitivities of Black Hole Images from GRMHD Simulations