Kerr-Taub-NUT spacetime to explain the jet power and the radiative efficiency of astrophysical black holes

Ahmadjon Abdujabbarov; Bakhtiyor Narzilloev; Bobomurat Ahmedov; Cosimo Bambi

Kerr-Taub-NUT spacetime to explain the jet power and the radiative efficiency of astrophysical black holes

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arxiv 2310.10554 v3 pith:6CW3UT7I submitted 2023-10-16 gr-qc astro-ph.HE

Bakhtiyor Narzilloev , Ahmadjon Abdujabbarov , Bobomurat Ahmedov , Cosimo Bambi This is my paper

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keywords blackholeskerr-taub-nutspacetimeefficiencyexplainpowerradiative

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In this work, we investigate the electromagnetic energy released by astrophysical black holes within the Kerr-Taub-NUT solution, which describes rotating black holes with a nonvanishing gravitomagnetic charge. In our study, we consider the black holes in the X-ray binary systems GRS 1915+105, GRO J1655-40, XTE J1550-564, A0620-00, H1743-322, and GRS 1124-683. We show that the Kerr-Taub-NUT spacetime can explain the radiative efficiency of these sources inferred from the continuum fitting method (CFM). We also show that, in the framework of the Blandford-Znajeck mechanism, it is possible to reproduce the observed jet power. We unify the results of the two analyses for the selected objects to get more stringent constraints on the spacetime parameters. We show that, as in the case of the Kerr spacetime, the Kerr-Taub-NUT solution cannot simultaneously explain the observed jet power and radiative efficiency of GRS 1915+105.

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

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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