Singularity-free black holes in conformal gravity: New observational constraints
Menglei ZhouCenter for Field Theory and Particle Physics and Department of Physics, Fudan University 200438 Shanghai, ChinaAskar B. AbdikamalovCenter for Field Theory and Particle Physics and Department of Physics, Fudan University 200438 Shanghai, ChinaDimitry AyzenbergCenter for Field Theory and Particle Physics and Department of Physics, Fudan University 200438 Shanghai, ChinaCosimo BambiCenter for Field Theory and Particle Physics and Department of Physics, Fudan University 200438 Shanghai, ChinaLeonardo ModestoDepartment of Physics, Southern University of Science and Technology (SUSTech) - Shenzhen 518055, ChinaSourabh NampalliwarTheoretical Astrophysics, Eberhard-Karls Universität Tübingen - 72076 Tübingen, GermanyYerong XuCenter for Field Theory and Particle Physics and Department of Physics, Fudan University 200438 Shanghai, China
2019en
ABI
Аннотация
We consider the family of singularity-free rotating black hole solutions in Einstein's conformal gravity found in Bambi, Modesto & Rachwal (2017) and we constrain the value of the conformal parameter $L$ from the analysis of a 30 ks 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 $L/M < 0.12$ (99% confidence level, statistical uncertainty only).
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