Tidally-induced angular momentum transport in disks

Details Tidally-induced angular momentum transport in disks Tidally-induced angular momentum transport in disks

2000-08-31

arxiv.org/abs/astro-ph/0008514v1

Astronomy and Astrophysics

Astrophysics

4 pages, LaTeX, uses newpasp.sty, to be published in 'The Formation of Binary Stars', eds. R.D. Mathieu and H. Zinnecker (ASP

Scientific paper

We discuss the transport of angular momentum induced by tidal effects in a disk surrounding a star in a pre-main sequence binary system. We consider the effect of both density and bending waves. Although tidal effects are important for truncating protostellar disks and for determining their size, it is unlikely that tidally-induced angular momentum transport plays a dominant role in the evolution of protostellar disks. Where the disk is magnetized, transport of angular momentum is probably governed by MHD turbulence. In a non self-gravitating laminar disk, the amount of transport provided by tidal waves is probably too small to account for the lifetime of protostellar disks. In addition, tidal effects tend to be localized in the disk outer regions.

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