Estimating the black hole mass of NGC 1313 X-1 based on the spectral and timing properties
Abstract
The discovery of 3:2 quasi-periodic oscillations (QPOs) in the ultraluminous X-ray source NGC 1313 X-1 suggests it harbors an intermediate-mass black hole (IMBH). We test this numerically by modelling the 3:2 QPOs and the associated X-ray spectrum based on the epicyclic resonance model and a disk-corona model with large-scale magnetic fields generated by the Cosmic Battery mechanism. The combined QPO-frequency and spectral fitting indicates that the BH mass ranges from 2524M⊙ to 6811M⊙ confirming its IMBH nature, and the BH spin is probably higher than ∼ 0.3.
- Publication:
-
Contributions of the Astronomical Observatory Skalnate Pleso
- Pub Date:
- April 2019
- DOI:
- 10.48550/arXiv.1901.01480
- arXiv:
- arXiv:1901.01480
- Bibcode:
- 2019CoSka..49....7H
- Keywords:
-
- accretion;
- accretion disks;
- black hole physics;
- magnetic fields;
- stars: individual: NGC 1313 X-1;
- Astrophysics - High Energy Astrophysical Phenomena
- E-Print:
- 12 pages, 2 figures