Conferències al DAA. Xarrada a càrrec de l'investigador Patryk Mach, de la Universitat de Jaguelònica, Cracòvia (Polònia). Lloc: Seminari del Departament d'Astronomia i Astrofísica, 4a planta de l'Edifici d'Investigació, a Burjassot. Dia: dimarts 18 de febrer de 2020. Hora: 12:00
RESUM:
I will report recent results in modeling of self-gravitating perfect-fluid Keplerian tori around black holes. The emphasis will be put on geometric properties of the corresponding spacetimes and their connection with parametric bifurcation occurring in the solution space. I will discuss the nonmonotonicity of the circumferential radius and the breaking of the Pappus-Guldinus rule. If time permits, I should also comment on the occurrence of toroidal ergoregions and the properties of geodesics in the obtained spacetimes.
Imatges:
