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

Impact factor

Impact factor: 1.955

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.