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Propeller activated resonances and the fate of short period cataclysmic variables

Autor: Matthews, O. M., Wheatley, P. J., Wynn, G. A., Truss, M. R.

Publikováno v: Mon.Not.Roy.Astron.Soc.372:1593-1601,2006

We show that the combination of a weak magnetic propeller and accretion disc resonances can effectively halt accretion in short period cataclysmic variables for large fractions of their lifetimes. This may help to explain the discrepancy between the

Externí odkaz: http://arxiv.org/abs/astro-ph/0608458

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The steady-state structure of accretion discs in central magnetic fields

Autor: Matthews, O. M., Speith, R., Truss, M. R., Wynn, G. A.

Publikováno v: Mon.Not.Roy.Astron.Soc. 356 (2005) 66-76

We develop a new analytic solution for the steady-state structure of a thin accretion disc under the influence of a magnetic field that is anchored to the central star. The solution takes a form similar to that of Shakura and Sunyaev and tends to the

Externí odkaz: http://arxiv.org/abs/astro-ph/0410471

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Outbursts of WZ Sagittae

Autor: Matthews, O. M., Truss, M. R., Wynn, G. A., Speith, R.

The outbursts of the dwarf nova WZ Sagittae occur on timescales which are much longer than expected from the standard thermal viscous disc instability model, which correctly reproduces the outburst behaviour of many other dwarf novae. In addition sho

Externí odkaz: http://arxiv.org/abs/astro-ph/0410143

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Hydrodynamic modelling of accretion flows

Autor: Murray, J. R., Truss, M. R., Foulkes, S. B., Haswell, C. A., Manson, K.

In the proceedings of this, and of several recent close binary conferences, there have been several contributions describing smoothed particle hydrodynamics simulations of accretion disks. It is apposite therefore to review the numerical scheme itsel

Externí odkaz: http://arxiv.org/abs/astro-ph/0403434

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The behaviour of quiescent accretion discs in dwarf novae

Autor: Truss, M. R., Wynn, G. A., Wheatley, P. J.

Publikováno v: Mon.Not.Roy.Astron.Soc.347:569,2004

We propose a simple explanation for the constant mean brightness observed between outbursts in dwarf novae. Secular changes in the total energy dissipation rate of the accretion disc brought about by variations in surface density, temperature and dis

Externí odkaz: http://arxiv.org/abs/astro-ph/0309613

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