Gravitational instabilities in helicity-1 waves propagating through matter in equilibrium
Abstract
It is shown that the interaction of helicity-1 waves of gravity and matter in a thin slab configuration produces new types of instabilities. Indeed, a transverse spin-2 helicity-1 mode interacts strongly with the shear motion of matter. This mode is unstable above a critical wavelength which reminds the Jeans wavelength but with the speed of sound interchanged by the speed of light. The two instabilities are of course different. For the case analyzed, a plane parallel configuration, Jeans instability appears through a density wave perturbation, the material collapsing into a set of plane-parallel slabs. On the other hand, the helicity-1 wave instability induces a transverse motion in the fluid that tends to shear in the material along the node of the perturbation.
Cite
@article{arxiv.gr-qc/0008028,
title = {Gravitational instabilities in helicity-1 waves propagating through matter in equilibrium},
author = {Luis Bento and Jose P. S. Lemos},
journal= {arXiv preprint arXiv:gr-qc/0008028},
year = {2010}
}
Comments
12 pages, latex, 1 figure ps file, final version to appear in CQG