Image features of spinning regular black holes based on a locality principle

To understand the true nature of black holes, fundamental theoretical developments should be linked all the way to observational features of black holes in their natural astrophysical environments. Here, we take several steps to establish such a link. We construct a family of spinning, regular black-hole spacetimes based on a locality principle for new physics and analyze their shadow images. We identify characteristic image features associated to regularity (increased compactness and relative stretching) and to the locality principle (cusps and asymmetry) that persist in the presence of a simple analytical disk model. We conjecture that these occur as universal features of distinct classes of regular black holes based on different sets of construction principles for the corresponding spacetimes.

Automated summary

Researchers establish a link between theoretical developments and observational features of black holes by constructing a family of spinning, regular black-hole spacetimes and analyzing their shadow images. They identify characteristic image features linked to regularity and the locality principle, and suggest these features as universal in distinct classes of regular black holes based on different sets of construction principles for the corresponding spacetimes.