Ambipolar diffusion in self-gravitating filaments

Details Ambipolar diffusion in self-gravitating filaments Ambipolar diffusion in self-gravitating filaments

Oct 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005a%26a...441..153f&link_type=abstract

Astronomy and Astrophysics, Volume 441, Issue 1, October I 2005, pp.153-158

Astronomy and Astrophysics

Astrophysics

Magnetohydrodynamics (Mhd), Stars: Formation, Ism: Clouds, Ism: Magnetic Fields

Scientific paper

One-dimensional similarity solutions for a collapsing, homogeneous, infinitely long cylinder that is subject to ambipolar diffusion are given. There is an analytical solution with infinite density being reached after 4.3 free-fall times. In that case the magnetic field strength Bz on the axis scales like B_z∝ρ2/3 with density ρ. The analytical solution proves “attractive”. Even if the initial conditions depart slightly from those of the analytical solution, that solution is nevertheless approached through damped oscillations.

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