Series Vol. 5 , 25 May 2023
* Author to whom correspondence should be addressed.
Despite the vast research on spinning black holes and jets, little is known about details of jet formation. This paper is aimed to study whether Penrose’s prediction that black hole spin power jets can be verified. Once proved, a deeper understanding of energy/momentum transfer near event horizon is to be achieved. This paper compares two dominant spin measuring methods. Thermal continuum fitting method makes use of thermal emission to measure the spin, where a theoretical flux profile is created by inputting parameters (inclination of X-ray binaries, distance of X-ray binaries from the earth, mass of black hole, etc). X-ray reflection method uses broadened Fe-line to measure the spin, and that corona geometry is often required. This paper also compares various definitions of jet power and spin-jets relation. In conclusion, transient jets are highly possible to be powered by black hole spin, but more evidence is required to confirm this. Steady jets remain in a vague relation with spin. It has also been found that different measuring methods of both spin and jets can affect the spin-jets relation.
Transient jet, black hole spin, x-ray binaries, jet power
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The datasets used and/or analyzed during the current study will be available from the authors upon reasonable request.