J 2024

Photon Shells, Black Hole Shadows, and Accretion Toroids

PUGLIESE, Daniela and Zdeněk STUCHLÍK

Basic information

Original name

Photon Shells, Black Hole Shadows, and Accretion Toroids

Authors

PUGLIESE, Daniela (380 Italy, belonging to the institution) and Zdeněk STUCHLÍK (203 Czech Republic, belonging to the institution)

Edition

Astrophysical Journal Supplement Series, GB - Spojené království Velké Británie a, 2024, 0067-0049

Other information

Language

English

Type of outcome

Článek v odborném periodiku

Field of Study

10308 Astronomy

Country of publisher

United Kingdom of Great Britain and Northern Ireland

Confidentiality degree

není předmětem státního či obchodního tajemství

References:

Impact factor

Impact factor: 8.700 in 2022

Organization unit

Institute of physics in Opava

DOI

UT WoS

001370907800001

Keywords in English

M87 event horizon; results VII polarization;observational signatures;energy extraction;kerr;images;field; jets;emission

Tags

Tags

International impact, Reviewed
Změněno: 16/1/2025 13:45, Mgr. Pavlína Jalůvková

Abstract

V originále

We analyze the properties of the Kerr black hole (BH) photon shell, focusing on the influence of aggregates of corotating and counterrotating toroids (ringed accretion disks, hereafter RAD), orbiting in the BH photon shell (photon shell "obscuration"). The particular case of a corotating accretion disk orbiting in the BH ergoregion is also investigated. We study influence on the BH shadow boundary, fixing the conditions under which it is possible to observe the ergoregion and RAD "imprint" on the shadows boundary. In general, remarkable differences appear between the counterrotating photon components of the boundary with respect to the corotating ones. Various regions of the shadow boundary generated from orbital regions linked to the aggregates of orbiting structures have been analyzed. In particular, we investigate the bound unstable spherical photon orbits in the ergoregion, or at the inversion point, where (toroidal) phi=0 , or with the impact parameter & ell; = 0 to characterize the effects of the frame dragging on the boundary. Five main classes of BHs have been identified by distinguishable features of their photon shells (and shadow boundaries) in the context of the orbiting RAD.