Time-resolved XRISM spectroscopy of NGC 4395 reveals variable inner-disk Fe Kα emission interpreted as Lense-Thirring precession, favoring low black hole mass (~9e3 solar masses) and moderate spin (a≳0.6).
Tilted Accretion Disks[J/OL]
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Disk-induced dissipation drives rapid orbital plane alignment followed by slower eccentricity damping in extreme mass-ratio inspirals, with relativistic effects producing accumulating deviations from Keplerian orbits even at large separations.
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.
citing papers explorer
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XRISM Time-resolved Fe K$\alpha$ Spectroscopy of NGC 4395: Time-variable Inner-disk Emission
Time-resolved XRISM spectroscopy of NGC 4395 reveals variable inner-disk Fe Kα emission interpreted as Lense-Thirring precession, favoring low black hole mass (~9e3 solar masses) and moderate spin (a≳0.6).
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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.