Wave motions in magnetic interstellar medium

Details Wave motions in magnetic interstellar medium Wave motions in magnetic interstellar medium

Aug 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000ap.....43..405b&link_type=abstract

Astrophysics (English translation of Astrofizika) Vol.43, p. 405-409 (2000)

Astronomy and Astrophysics

Astrophysics

2

Magneto-Mechanical Waves, Magnetic Interstellar Medium, Ferrograins, Gas-Based Ferrocolloidal Fluid

Scientific paper

This communication considers continuum approach modelling large-scale dynamics of non-conducting interstellar medium capable of sustaining long-ranged filamentary agglomeration of tiny superparamagnetic grains suspended in dense molecular cloud. The filamentary ordering of permanently magnetized grains, oriented in the direction of regular galactic field threading the cloud, is thought of as an effect of soft magnetic solidification of nonconducting gas-dust substance imparting to interstellar material the mechanical features of single-axis magnetoelastic insulators. We set up macroscopic equations furnishing opportunity to study dissipative free motions of superparamagentic gas-dust non-ionized matter in terms of continuum mechanics of magnetoelastic materials. Particular attention is given to oscillatory behavior of such a matter in the regime of strong magnetization-flow coupling. The most remarcable inference of the model is that magnetically polarized interstellar medium can transmit perturbations by transverse waves of magentization which can be regarded as a counterpart of Alfvenic waves generic to cosmic dusty plasma

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