Density Spectrum in the Diffuse Interstellar Medium and Solar Wind

descriptionPublicationkeyboard_double_arrow_right Article 29 Jan 2004 English Publisher:American Astronomical SocietyJournal:The Astrophysical Journal, volume 602, pages L29-L32 (issn: 0004-637X, eissn: 1538-4357,

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Authors: S. Dastgeer; G. P. Zank;

doi: 10.1086/382275

Density Spectrum in the Diffuse Interstellar Medium and Solar Wind

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Abstract

Inertial range turbulence properties are investigated for nearly incompressible density fluctuations using two-dimensional nonlinear fluid simulations. We find that density fluctuations behave as a passive scalar and do not satisfy the pseudosound approximation. As a result, the density fluctuations follow a Kolmogorov-like spectrum, and this is a possible explanation for the observed diffuse interstellar and solar wind density fluctuation spectrum.

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University of California, Riverside
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