PT Journal
AU Guerrero, M
   Olmo, GJ
   Rubiera-Garcia, D
   Saez-Chillon Gomez, D
TI Shadows and optical appearance of black bounces illuminated by a thin accretion disk
SO Journal of Cosmology and Astroparticle Physics
JI J. Cosmol. Astropart. Phys.
PY 2021
BP 036
EP 19pp
VL 08
IS 8
DI 10.1088/1475-7516/2021/08/036
LA English
DE GR black holes; Wormholes; modified gravity; accretion
AB We study the light rings and shadows of an uniparametric family of spherically symmetric geometries interpolating between the Schwarzschild solution, a regular black hole, and a traversable wormhole, and dubbed as black bounces, all of them sharing the same critical impact parameter. We consider the ray-tracing method in order to study the impact parameter regions corresponding to the direct, lensed, and photon ring emissions, finding a broadening of all these regions for black bounce solutions as compared to the Schwarzschild one. Using this, we determine the optical appearance of black bounces when illuminated by three standard toy models of optically and geometrically thin accretion disks viewed in face-on orientation.
ER