Singularity-free black holes in conformal gravity: New observational constraints
2019
We consider the family of singularity-free rotating black hole solutions in Einstein's conformal gravity found in Bambi C. et al., JCAP , 05 (2017) 003 and we constrain the value of the conformal parameter L from the analysis of a NuSTAR observation of the stellar-mass black hole in GS 1354–645 during its outburst in 2015. Our new constraint is much stronger than that found in previous work. Here we obtain (99% confidence level, statistical uncertainty only).
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