2005/10/24 by Jiří Horák, Jiri Horak · 1 citation
Earth and Planetary Sciences · Physics and Astronomy · #Astrophysical Phenomena and Observations #Astrophysics and Star Formation Studies #High-pressure geophysics and materials #astro-ph
paper · pdf · doi:10.1002/asna.200510425
published as Astron.Nachr.326:845-848,2005 · 5 pages, 2 figures
openalex publication_date 2005/10/24 · arxiv created 2005/11/18 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Abstract It was pointed out by Paczyński (1987) that the X‐ray luminosity of accreting neutron stars is very sensitive to the physical properties of the accretion flow close to the innermost stable circular orbit. The X‐ray radiation is dominated by that emitted in the boundary layer, where accreted matter hits a star surface. The X‐ray luminosity of the boundary layer is proportional to the local accretion rate. In this note, we estimate a local accretion rate variations from the disk that undergoes non‐stationary axisymmetric perturbations. The perturbations are given by the poloidal‐velocity potential.We obtain a simple formula describing the modulation of the accretion rate for the particular case of global vertical disk oscillations that have been recently studied by Abramowicz et al. (2005). (© 2005 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)