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Observational Evidence for a Correlation Between Jet Power and Black Hole Spin

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arxiv 1112.0569 v1 pith:GIC3MM3E submitted 2011-12-02 astro-ph.HE gr-qc

Ramesh Narayan , Jeffrey E. McClintock This is my paper · ORCID
classification astro-ph.HEgr-qc
keywords blackholespincorrelationjetsballisticcontinuum-fittingevidence
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We show that the 5-GHz radio flux of transient ballistic jets in black hole binaries correlates with the dimensionless black hole spin parameter a* estimated via the continuum-fitting method. The data suggest that jet power scales either as the square of a* or the square of the angular velocity of the horizon. This is the first direct evidence that jets may be powered by black hole spin energy. The observed correlation validates the continuum-fitting method of measuring spin. In addition, for those black holes that have well-sampled radio observations of ballistic jets, the correlation may be used to obtain rough estimates of their spins.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Universality of the Blandford-Znajek emission in stationary and axisymmetric spacetimes

    gr-qc 2026-02 conditional novelty 7.0 of 10

    The Blandford-Znajek jet luminosity is universal (∝Ω_h²) at leading order across parametric black-hole spacetimes and spacetime-dependent at next order, breaking the low-spin degeneracy for rapidly rotating holes.

  2. Regular Rotating Black Hole: Probing the boundaries of the Radiative Signatures and Jet Power

    astro-ph.HE 2025-08 conditional novelty 5.0 of 10

    MOG regular rotating black holes are compatible with most X-ray binary data only for beta below about 0.38 to 0.4, and are excluded for the near-extremal source GRS 1915+105.

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