Inertial-acoustic oscillations of black hole accretion discs with large-scale poloidal magnetic fields

	Inertial-acoustic oscillations of black hole accretion discs with large-scale poloidal magnetic fields
	Yu C(余聪)1,2,3 ; Lai, D 2
刊名	MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
	2015-07
卷号	450 期号:3 页码:2466-2472
关键词	accretion accretion discs hydrodynamics magnetic field waves
ISSN号	0035-8711
通讯作者	Yu, C (reprint author), Chinese Acad Sci, Yunnan Observ, Kunming 650011, Peoples R China.
产权排序	第一完成单位
英文摘要	We study the effect of large-scale magnetic fields on the non-axisymmetric inertial-acoustic modes (also called p modes) trapped in the innermost regions of accretion discs around black holes (BHs). These global modes could provide an explanation for the high-frequency quasi-periodic oscillations (HFQPOs) observed in BH X-ray binaries. There may be observational evidence for the presence of such large-scale magnetic fields in the discs since episodic jets are observed in the same spectral state when HFQPOs are detected. We find that a large-scale poloidal magnetic field can enhance the corotational instability and increase the growth rate of the purely hydrodynamic overstable p modes. In addition, we show that the frequencies of these overstable p modes could be further reduced by such magnetic fields, making them agree better with observations.
学科主题	Astronomy & Astrophysics
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	QUASI-PERIODIC OSCILLATIONS ; ROSSBY-WAVE INSTABILITY ; COROTATIONAL INSTABILITY ; EJECTION INSTABILITY ; MAGNETOHYDRODYNAMIC SIMULATIONS ; DIFFUSION-COEFFICIENTS ; VERTICAL STRUCTURE ; COLLAPSING STAR ; DISKS ; MODES
收录类别	SCI
原文出处	http://mnras.oxfordjournals.org/content/450/3/2466
语种	英语
WOS记录号	WOS:000356339300019
内容类型	期刊论文
源URL	[http://ir.ynao.ac.cn/handle/114a53/4594]
专题	云南天文台_大样本恒星演化研究组云南天文台_中国科学院天体结构与演化重点实验室
作者单位	1.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650011, China 2.Department of Astronomy, Cornell University, Ithaca, NY 14853, USA 3.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650011, China
推荐引用方式 GB/T 7714	Yu C,Lai, D. Inertial-acoustic oscillations of black hole accretion discs with large-scale poloidal magnetic fields[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2015,450(3):2466-2472.
APA	Yu C,&Lai, D.(2015).Inertial-acoustic oscillations of black hole accretion discs with large-scale poloidal magnetic fields.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,450(3),2466-2472.
MLA	Yu C,et al."Inertial-acoustic oscillations of black hole accretion discs with large-scale poloidal magnetic fields".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 450.3(2015):2466-2472.