2005/10/31 by Jamshid Ghanbari, Ghanbari, J., Mohsen Shadmehri +3
Decision Sciences · Physics and Astronomy · #Astro and Planetary Science #Astrophysical Phenomena and Observations #Astrophysics (astro-ph) #Astrophysics and Star Formation Studies #FOS: Physical sciences #Scientific Measurement and Uncertainty Evaluation
paper · pdf · doi:10.48550/arxiv.astro-ph/0510840
openalex publication_date 2005/10/31 · openalex created_date 2020/01/30 · openalex updated_date 2026/07/28
We study the nonlinear dynamics of a warped or twisted accretion disc, in\nwhich the viscosity coefficients are assumed to be locally proportional to the\nrotational velocity (beta- prescription). Using asymptotic methods for thin\ndiscs, dynamical equations of the disc are obtained in a warped spherical polar\ncoordinates. These equations are solved by the method of the separation of the\nvariables. This analysis constitutes an analogous study of the nonlinear theory\nof an alpha model warped disc which has been studied by Ogilvie (1999). We have\ncompared our results with Ogilvie's analysis. The dynamical behaviors of these\nmodels have also been discussed. Our results show that different viscosity\nprescriptions and magnitudes (alpha and beta prescriptions) affect dynamics of\na warped accretion disc. Therefore it can be important in determining the\nviscosity law even for a warped disc.\n