2004/11/23 by Eduardo Rubio-Herrera, E. Rubio-Herrera, William H. Lee · 5 citations
Physics and Astronomy · #Astrophysical Phenomena and Observations #Laser-Plasma Interactions and Diagnostics #Pulsars and Gravitational Waves Research #astro-ph
paper · pdf · doi:10.1111/j.1745-3933.2005.00011.x
published as Mon.Not.Roy.Astron.Soc. 357 (2005) L31-L34 · 4 pages, 4 figures, accepted for publication as a letter in the Monthly Notices of the Royal Astronomical Society
arxiv created 2004/11/23 · openalex publication_date 2005/02/01 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Abstract We present a numerical study of the response of a thick accretion disc to a localized, external perturbation with the aim of exciting internal modes of oscillation. We find that the perturbations efficiently excite global modes recently identified as acoustic p-modes, and closely related to the epicyclic oscillations of test particles. The two strongest modes occur at eigenfrequencies which are in a 3:2 ratio. We have assumed a constant specific angular momentum distribution within the disc. Our models are in principle scale-free and can be used to simulate accretion tori around stellar or super-massive black holes.