J 2024

Inter-disks inversion surfaces

PUGLIESE, Daniela and Zdeněk STUCHLÍK

Basic information

Original name

Inter-disks inversion surfaces

Authors

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

Edition

European Physical Journal C, New York (USA), SPRINGER, 2024, 1434-6044

Other information

Language

English

Type of outcome

Článek v odborném periodiku

Field of Study

10308 Astronomy

Country of publisher

United States of America

Confidentiality degree

není předmětem státního či obchodního tajemství

References:

Impact factor

Impact factor: 4.400 in 2022

Organization unit

Institute of physics in Opava

UT WoS

001339128100004

Keywords in English

supermassive black-holes;retrograde accreation;misaligned accreation;circularpolarization;tidal disruptions;jet connection;parsec-scale;spin;evolution;simulations

Tags

Tags

International impact, Reviewed
Změněno: 15/1/2025 11:18, Mgr. Pavlína Jalůvková

Abstract

V originále

We consider a counter-rotating torus orbiting a central Kerr black hole (BH) BH ) with dimensionless spin a , and its accretion flow into the BH , in an agglomerate of an outer counter-rotating torus and an inner co-rotating torus. This work focus is the analysis of the inter-disks inversion surfaces. Inversion surfaces are spacetime surfaces, defined by the condition u = 0 on the flow torodial velocity, located out of the BH ergoregion, and totally embedding the BH . They emerge as a necessary condition, related to the spacetime frame-dragging, for the counter-rotating flows into the central Kerr BH . In our analysis we study the inversion surfaces of the Kerr spacetimes for the counter-rotating flow from the outer torus, impacting on the inner co-rotating disk. Being totally or partially embedded in (internal to) the inversion surfaces, the inner co-rotating torus (or jet) could be totally or in part "shielded", respectively, from the impact with flow with au < 0. We prove that, in general, in the spacetimes with a < 0.551 . 551 the co-rotating toroids are always external to the accretion flows inversion surfaces. For 0.551 . 551 < a < 0.886, . 886, co-rotating toroids could be partially internal (with the disk inner region, including the inner edge) in the flow inversion surface. For BHs with a > 0.886, . 886, a co-rotating torus could be entirely embedded in the inversion surface and, for larger spins, it is internal to the inversion surfaces. Tori orbiting in the BH outer ergoregion are a particular case. Further constraints on the BHs spins are discussed in the article.