The Open UniversitySkip to content
 

Three-dimensional smoothed particle hydrodynamics simulations of radiation-driven warped accretion discs

Foulkes, S. B.; Haswell, C. A. and Murray, James R. (2006). Three-dimensional smoothed particle hydrodynamics simulations of radiation-driven warped accretion discs. Monthly Notices of the Royal Astronomical Society, 366(4) pp. 1399–1409.

DOI (Digital Object Identifier) Link: https://doi.org/10.1111/j.1365-2966.2005.09910.x
Google Scholar: Look up in Google Scholar

Abstract

We present three-dimensional smoothed particle hydrodynamics calculations of warped accretion discs in X-ray binary systems. Geometrically thin, optically thick accretion discs are illuminated by a central radiation source. This illumination exerts a non-axisymmetric radiation pressure on the surface of the disc, resulting in a torque that acts on the disc to induce a twist or warp. Initially planar discs are unstable to warping driven by the radiation torque and, in general, the warps also precess in a retrograde direction relative to the orbital flow. We simulate a number of X-ray binary systems which have different mass ratios, using a number of different luminosities for each. Radiation-driven warping occurs for all systems simulated. For mass ratios q∼ 0.1 a moderate warp occurs in the inner disc while the outer disc remains in the orbital plane (cf. X 1916−053). For less extreme mass ratios, the entire disc tilts out of the orbital plane (cf. Her X–1). For discs that are tilted out of the orbital plane in which the outer edge material of the disc is precessing in a prograde direction, we obtain both positive and negative superhumps simultaneously in the dissipation light curve (cf. V603 Aql).

Item Type: Journal Item
ISSN: 1365-2966
Keywords: accretion: accretion discs – methods: numerical – binaries: close – X-rays: binaries.
Academic Unit/School: Faculty of Science, Technology, Engineering and Mathematics (STEM) > Physical Sciences
Faculty of Science, Technology, Engineering and Mathematics (STEM)
Item ID: 10934
Depositing User: Astrid Peterkin
Date Deposited: 02 Jul 2008
Last Modified: 07 Dec 2018 09:10
URI: http://oro.open.ac.uk/id/eprint/10934
Share this page:

Metrics

Altmetrics from Altmetric

Citations from Dimensions

Actions (login may be required)

Policies | Disclaimer

© The Open University   contact the OU