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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Be discs in binary systems - II. Misaligned orbits

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Author(s):
Cyr, I. H. ; Jones, C. E. ; Panoglou, D. ; Carciofi, A. C. ; Okazaki, A. T.
Total Authors: 5
Document type: Journal article
Source: Monthly Notices of the Royal Astronomical Society; v. 471, n. 1, p. 596-605, OCT 2017.
Web of Science Citations: 2
Abstract

We use a smoothed particle hydrodynamics (SPH) code to examine the effects of misaligned binary companions on Be star discs. We systematically vary the degree of misalignment between the disc and the binary orbit, as well as the disc viscosity and orbital period to study their effects on the density in the inner and outer parts of the disc. We find that varying the degree of misalignment, the viscosity and the orbital period affects both the truncation radius and the density structure of the outer disc, while the inner disc remains mostly unaffected. We also investigate the tilting of the disc in the innermost part of the disc and find the tilt increases with radius until reaching a maximum around 5 stellar radii. The direction of the line of nodes, with respect to the equator of the central star, is found to be offset compared to the orbital line of nodes, and to vary periodically in time, with a period of half a orbital phase. We also compare the scaleheight of our discs with the analytical scaleheight of an isothermal disc, which increases with radius as r(1.5). We find that this formula reproduces the scaleheight well for both aligned and misaligned systems but underestimates the scaleheight in regions of the disc where density enhancements develop. (AU)

FAPESP's process: 13/16801-2 - Modelling the formation and evolution of inflowing and outflowing gaseous disks around stars
Grantee:Despina Panoglou
Support type: Scholarships in Brazil - Post-Doctorate
FAPESP's process: 15/17967-7 - Viscous decretion disks: theory and observations
Grantee:Alex Cavaliéri Carciofi
Support type: Regular Research Grants
FAPESP's process: 09/54006-4 - A computer cluster for the Astronomy Department of the University of São Paulo Institute of Astronomy, Geophysics and Atmospheric Sciences and for the Cruzeiro do Sul University Astrophysics Center
Grantee:Elisabete Maria de Gouveia Dal Pino
Support type: Multi-user Equipment Program