Low-Frequency Quasi-Periodic Oscillations in the X-ray Nova MAXI J1535-571 at the Initial Stage of Its 2017 Outburst
Abstract
We report the discovery of low-frequency quasi-periodic oscillations (QPOs) in the power spectrum of the X-ray nova MAXI J1535-571 at the initial stage of its outburst in September 2017. Based on data from the SWIFT and INTEGRAL instruments, we have traced the evolution of the QPO parameters (primarily their frequency) with time and their correlation with changes in the X-ray spectrum of the source (changes in the emission flux and hardness). We place constraints on the theoretical QPO generation models.
- Publication:
-
Astronomy Letters
- Pub Date:
- June 2018
- DOI:
- 10.1134/S106377371806004X
- arXiv:
- arXiv:1806.06025
- Bibcode:
- 2018AstL...44..378M
- Keywords:
-
- X-ray novae;
- black holes;
- disk accretion;
- X-ray emission;
- power spectra;
- low-frequency noise;
- quasi-periodic oscillations;
- Astrophysics - High Energy Astrophysical Phenomena
- E-Print:
- 12 pages, 7 figures