The bicoherence study of quasi-periodic oscillations in MAXI J1535-571

Autor:	Zhu, Ziyuan, Chen, Xiao, Wang, Wei
Rok vydání:	2024
Předmět:	Astrophysics - High Energy Astrophysical Phenomena Astrophysics - Solar and Stellar Astrophysics
Druh dokumentu:	Working Paper
Popis:	Bicoherence is a way to measure the phase coupling of triplets of Fourier frequencies. We use this method to analyze quasi-periodic oscillations (QPOs) in the black hole X-ray binary MAXI J1535$-$571 during its 2017 September-October outburst. The bicoherence provides an interesting new diagnostic to uncover QPO behaviour and the relationships between QPO harmonics and broadband noise. The bicoherence pattern of type-C QPOs starts as a 'web' pattern and changes to a 'hypotenuse' pattern after the presence of type-B QPOs, indicating that MAXI J1535$-$571 is a low-inclination source. The intensity of bicoherence also exhibits variations across different energy bands. We try to explain the bicoherence results in the scenario of a dual-corona geometry. Comment: 10 pages, 9 figures, accept for publication in MNRAS
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2403.13606 Zobrazit plný text záznamu View this record from Arxiv