Hotspots and photon rings in spherically-symmetric spacetimes
Sign Up to like & getrecommendations! Published in 2024 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/stae1321
Abstract: Future black hole (BH) imaging observations are expected to resolve finer features corresponding to higher-order images of hotspots and of the horizon-scale accretion flow. In spherical spacetimes, the image order is determined by the number… read more here.
Keywords: diameters widths; hotspots photon; order images; photon rings ... See more keywords
Interferometric signature of higher-order images in a parametrized framework
Sign Up to like & getrecommendations! Published in 2025 at "Physical Review D"
DOI: 10.1103/1gls-k3df
Abstract: This paper investigates gravitational lensing in the strong deflection limit, focusing particularly on higher-order images produced near compact objects such as black holes and their observable impact through the visibility function. Employing a robust parametrization… read more here.
Keywords: higher order; interferometric signature; framework; order images ... See more keywords