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- W4200629482 abstract "Black holes carrying a magnetic monopole charge are a subject of interest for a long time. In this work we explore the possibility of an observational evidence of such black holes carrying a magnetic monopole, namely the Bardeen rotating black holes. We derive the theoretical spectrum from the accretion disk surrounding a Bardeen black hole using the thin-disk approximation. We compare the theoretically derived spectrum in comparison to the optical data of eighty Palomar Green quasars to constrain the monopole charge parameter $g$ and the spin parameter $a$ of the quasars. From our analysis we note that the Kerr-scenario in gr is observationally more favored than black holes with a monopole charge. We arrive at such a conclusion using error estimators like $chi^2$, the Nash-Sutcliffe efficiency, the index of agreement and their modified forms. In particular, black holes with $g geq 0.03$ are outside $99%$ confidence interval. The implications are discussed." @default.
- W4200629482 created "2021-12-31" @default.
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- W4200629482 date "2021-12-10" @default.
- W4200629482 modified "2023-09-29" @default.
- W4200629482 title "Quasar continuum spectrum disfavors black holes with a magnetic monopole charge" @default.
- W4200629482 hasPublicationYear "2021" @default.
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