Inhibition of turbulent transfer in self-gravitating flows below the Jeans length.

Details Inhibition of turbulent transfer in self-gravitating flows below the Jeans length. Inhibition of turbulent transfer in self-gravitating flows below the Jeans length.

Aug 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997a%26a...324l..21g&link_type=abstract

Astronomy and Astrophysics, v.324, p.L21-L24

Astronomy and Astrophysics

Astrophysics

Gravitation, Hydrodynamics, Turbulence, Interstellar Matter: Kinematics And Dynamics, Methods: Numerical

Scientific paper

Turbulent flows within clouds with Jeans numbers of order unity are observed in the interstellar medium. In the absence of self-gravitation, compressible turbulent flows steepen, form shocks, and hence dissipate rapidly. We show here that, for wavelengths immediately below the gravitational instability threshold, this nonlinear steepening does not occur, and dissipation is drastically reduced. This result might alleviate somewhat the problem of feeding the turbulence in marginally stable clouds (with Jeans number slightly below unity).

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