Trapped, Two-Armed, Nearly Vertical Oscillations in Disks with Toroidal Magnetic Fields II: Effects of Finite Thickness

Abstract

We examine radial trapping of two-armed ($m=2$) vertical p-mode oscillations in geometrically thin relativistic disks which are vertically isothermal but terminated at a certain height by the presence of hot and low-density corona. The disks are assumed to be subject to toroidal magnetic fields. The oscillations are classified by $n$, a number related to the node number of oscillations in the vertical direction and starting from $n=1$. In modes with $n=1$, the frequencies of trapped oscillations depend little on the height of termination, but in modes with $n=2,3,...$ the frequencies decrease and the radial extends of trapped region become wide, as the termination height decreases. This study is a preparation to examine whether these oscillations can describe kilo-hertz quasi-periodic oscillations (kHz QPOs), horizontal branch oscillation (HBOs), and their correlations.

19 pages, 9 figures; 2012, PASJ Vol. 64

References in corpus (4)

• Normal Modes of Black Hole Accretion Disks
• An Attempt to Describe Frequency Correlations among kHz QPOs and HBOs by Two-Armed Nearly Vertical Oscillations
• Trapped, Two-Armed, Nearly Vertical Oscillations in Disks with Toroidal Magnetic Fields
• Correlated Frequency-Changes of Trapped Vertical p-mode Oscillations and kHz QPOs

Cited by in corpus (3)

• A Resonantly-Excited Disk-Oscillation Model of High-Frequency QPOs of Microquasars
• An Attempt to Describe Frequency-Correlations among kHz QPOs and HBOs by Two-Armed Vertical p-mode Oscillations: Case of No Magnetic Field
• Resonant Excitation of Tilt Mode in Tidally Deformed Disks