EHT data show a 51.8 microarcsecond ring around Sgr A* consistent with the shadow of a 4 million solar mass Kerr black hole viewed at moderate inclination.
Gravitational Test beyond the First Post-Newtonian Order with the Shadow of the M87 Black Hole
4 Pith papers cite this work. Polarity classification is still indexing.
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Simulations show the singularity-free Kerr-Hayward metric yields EHT observables that are functionally indistinguishable from the Kerr metric.
In a viable f(R) model transitioning from early GR-like to late non-GR behavior, matter power spectra show higher monopole and quadrupole power at small scales with quadrupole elevated at large scales up to k~0.02, while scalaron mass decreases over time to GR limits on galactic scales.
No credible isolated black hole candidates were found in a Gaia DR3 search within 15 pc of the Sun after multi-wavelength checks dismissed five sources as probable artifacts.
citing papers explorer
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First Sagittarius A* Event Horizon Telescope Results. I. The Shadow of the Supermassive Black Hole in the Center of the Milky Way
EHT data show a 51.8 microarcsecond ring around Sgr A* consistent with the shadow of a 4 million solar mass Kerr black hole viewed at moderate inclination.
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On the observational distinguishability of the Kerr and Kerr-Hayward metrics to EHT
Simulations show the singularity-free Kerr-Hayward metric yields EHT observables that are functionally indistinguishable from the Kerr metric.
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Cosmological perturbations with $f(R)$ gravity scalarons : Galaxy power spectra and the scalaron mass
In a viable f(R) model transitioning from early GR-like to late non-GR behavior, matter power spectra show higher monopole and quadrupole power at small scales with quadrupole elevated at large scales up to k~0.02, while scalaron mass decreases over time to GR limits on galactic scales.
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Searching for Isolated Black Hole Candidates within 15 pc of the Solar System in Gaia DR3
No credible isolated black hole candidates were found in a Gaia DR3 search within 15 pc of the Sun after multi-wavelength checks dismissed five sources as probable artifacts.