Statistics
Scientific paper
Sep 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005aipc..784..299f&link_type=abstract
MAGNETIC FIELDS IN THE UNIVERSE: From Laboratory and Stars to Primordial Structures. AIP Conference Proceedings, Volume 784, pp
Statistics
7
Interstellar Molecules, Turbulence, Magnetohydrodynamics, Hi Regions And 21-Cm Lines, Diffuse, Translucent, And High-Velocity Clouds, Physical Properties, Magnetohydrodynamics And Plasmas
Scientific paper
Several properties of the cold interstellar molecular gas may be interpreted as the signatures of the intermittency of turbulence. These are non-Gaussian statistics of the velocity field, plus ubiquitous traces of warm gas within the cold medium. The existence of the warm gas is attested to by observations of highly excited molecular hydrogen and by manifestations of a specific chemistry. Small-scale coherent magnetized vortices and low velocity magneto-hydrodynamical shocks are able to reproduce most of these properties. In both kinds of structure, and for different reasons, the neutrals decouple from the ions and magnetic fields. Interferometric observations seem to favor small scale vortices rather than shocks, involving timescales of only a few thousands years.
Falgarone Edith
Hily-Blant Pierre
Pety Jérôme
Pineau des Forêts Guillaume
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