We discuss mass transfer in eccentric binaries containing a white dwarf and a neutron star (WD--NS binaries). We show that such binaries are produced from field binaries following a series of mass transfer episodes that allow the white dwarf to form before the neutron star. We predict the orbital properties of binaries similar to the observed WD--NS binary J1141+6545, and show that they will undergo episodic mass transfer from the white dwarf to the neutron star. Furthermore, we describe oil-on-water, a two-phase SPH formalism that we have developed in order to model mass transfer in such binaries.
@article{arxiv.1110.4214,
title = {Interacting compact binaries: modeling mass transfer in eccentric systems},
author = {Ross P. Church and Melvyn B. Davies and Alexey Bobrick and Christopher A. Tout},
journal= {arXiv preprint arXiv:1110.4214},
year = {2011}
}
Comments
4 pages, 2 figures, to appear in the ASP conference series proceedings of "Advances in Computational Astrophysics: methods, tools, and outcomes" in Cefalu', Italy, June 13-17, 2011