Understanding Simulations of Thin Accretion Disks by Energy Equation
Da-Bin Lin, Wei-Min Gu, Tong Liu, Mou-Yuan Sun, and Ju-Fu Lu
TL;DR
This paper provides an analytical understanding of the fluctuations in thin accretion disks by analyzing the energy equation, explaining simulation results related to time delays, power spectra, and energy correlations.
Contribution
It introduces a linear analysis of the energy equation to interpret simulation findings of thin accretion disk fluctuations.
Findings
Analytic explanation of time delays in simulations
Understanding of power spectral relationships
Correlation between magnetic and radiation energy
Abstract
We study the fluctuations of standard thin accretion disks by linear analysis of the time-dependent energy equation together with the vertical hydrostatic equilibrium and the equation of state. We show that some of the simulation results in Hirose et al. (2009b), such as the time delay, the relationship of power spectra, and the correlation between magnetic energy and radiation energy, can be well understood by our analytic results.
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