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

Abstract

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.

13 pages, 9 figures. v3: references added

References in corpus (5)

• Constraints on the spacetime geometry around 10 stellar-mass black hole candidates from the disk's thermal spectrum
• Analytic treatment of complete and incomplete geodesics in Taub-NUT space-times
• Particle Motion and Electromagnetic Fields of Rotating Compact Gravitating Objects with Gravitomagnetic Charge
• Attempt to find a correlation between the spin of stellar-mass black hole candidates and the power of steady jets: relaxing the Kerr black hole hypothesis
• General Relativistic Effect of Gravitomagnetic Charge on Pulsar Magnetosphere and Particle Acceleration in a Polar Cap

Cited by in corpus (2)

• Observed jet power and radiative efficiency of black hole candidates in Kerr + PFDM model
• Observational constraints on the Kerr and its several single-parameter modified spacetimes using quasi-periodic oscillation data