Spin of the M87 black hole

Abstract

Spin measurement of the 6.5 billion solar mass black hole in M87 from the Event Horizon Telescope image is the latest in a series that span a wide range in values, but that tend to share the feature of co-rotation between the accretion flow and black hole. The spin paradigm for black holes predicts very high black hole spin which in that framework was produced in its last significant merger. High black hole spin appears to be ruled out in the gap paradigm, however, which predicts early formation with a mass already in excess of 4 billion solar masses. In this picture, the black hole experienced slow evolution as it departed from its original radio quasar phase and over billions of years not only failed to double its mass but also fell short of regaining its original high spin, such that it is now compatible with a co-rotating accreting black hole whose dimensionless spin fits best in the range 0.2 < a < 0.5.

References in corpus (10)

• First M87 Event Horizon Telescope Results. VI. The Shadow and Mass of the Central Black Hole
• Radio-Loudness of Active Galactic Nuclei: Observational Facts and Theoretical Implications
• Jet Launching Structure Resolved Near the Supermassive Black Hole in M87
• The Black Hole Mass, Stellar M/L, and Dark Halo in M87
• Magnetorotational Turbulence and Dynamo in a Collisionless Plasma
• Trapping of magnetic flux by the plunge region of a black hole accretion disk
• The Radiative Efficiency and Spectra of Slowly Accreting Black Holes from Two-Temperature GRRMHD Simulations
• Constraint on the black-hole spin of M87 from the accretion-jet model
• Spins of the supermassive black hole in M87: new constraints from TeV observations
• Magnetic Fields Threading Black Holes: restrictions from general relativity and implications for astrophysical black holes

Cited by in corpus (8)

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• Thermodynamics of Black String from Rényi entropy in de Rham-Gabadadze-Tolley Massive Gravity Theory
• The Lense-Thirring effect at work in M87${}^{\ast }$
• Greybody Factor for massive scalar field in charged black hole
• The no-hair theorems at work in M87${}^{\ast }$