J 2013

Multi-Resonance Orbital Model Applied to High-Frequency Quasi-Periodic Oscillations Observed in Sgr A*

KOTRLOVÁ, Andrea, Zdeněk STUCHLÍK and Gabriel TÖRÖK

Basic information

Original name

Multi-Resonance Orbital Model Applied to High-Frequency Quasi-Periodic Oscillations Observed in Sgr A*

Authors

Edition

Acta Astronomica, PL - Polská republika, 2013, 0001-5237

Other information

Language

English

Type of outcome

Článek v odborném periodiku

Field of Study

10308 Astronomy

Confidentiality degree

není předmětem státního či obchodního tajemství

Organization unit

Faculty of Philosophy and Science in Opava

UT WoS

000323396300009

Keywords in English

Accretion; accretion disks; X-rays: general; Black hole physics; X-rays: individuals: Sgr A*

Tags

Tags

International impact, Reviewed

Links

GA202/09/0772, research and development project.
Změněno: 7/4/2021 15:10, Mgr. Pavlína Jalůvková

Abstract

V originále

The multi-resonance orbital model of high-frequency quasi-periodic oscillations (HF QPOs) enables precise determination of the black hole dimensionless spin a if observed set of oscillations demonstrates three (or more) commensurable frequencies. The black hole spin a is related to the frequency ratio only, while its mass M is related to the frequency magnitude. The model is applied to the triple frequency set of HF QPOs observed in Sgr A* source with frequency ratio 3 : 2: 1. Acceptable versions of themulti-resonance model are determined by the restrictions on the Sgr A* supermassive black hole mass. The version of strong resonances related to the black hole "magic" spin a = 0.983 is acceptable but the version demonstrating the best agreement with the mass restrictions predicts spin a = 0.980.