New Insights into Kerr-MOG Black Holes and Their Imaging

Recent research has focused on the imaging of Kerr-MOG black holes, which are surrounded by geometrically thick magnetized equilibrium tori. This study, conducted by Zelin Zhang, Songbai Chen, and Jiliang Jing, utilizes general relativistic ray-tracing (GRRT) techniques to analyze the visual characteristics of these black holes. The findings indicate that the inclusion of a dimensionless MOG parameter, which signifies a deviation from the traditional Kerr black hole model, results in smaller disk sizes while simultaneously increasing the total flux density and peak brightness of the images produced.

The research also integrates observational data from the black hole M87*, as captured by the Event Horizon Telescope (EHT). By doing so, the authors were able to constrain the parameters of the Kerr-MOG black hole model, revealing that the MOG parameter broadens the range of allowable black hole spin. This advancement in understanding could have significant implications for astrophysical models and the interpretation of black hole observations.

The paper, titled "Images of Kerr-MOG black holes surrounded by geometrically thick magnetized equilibrium tori," is available on arXiv under the identifier arXiv:2404.12223.