The turbulent interstellar medium and pressure-bounded molecular clouds

Details The turbulent interstellar medium and pressure-bounded molecular clouds The turbulent interstellar medium and pressure-bounded molecular clouds

Nov 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apj...334..761m&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 334, Nov. 15, 1988, p. 761-770.

Astronomy and Astrophysics

Astrophysics

62

Interstellar Matter, Molecular Clouds, Turbulence Effects, Absorption Spectra, Gravitational Effects, Interstellar Magnetic Fields, Polytropic Processes, Pressure Distribution, Spectral Line Width

Scientific paper

The existence of turbulence throughout the interstellar medium suggests that an appropriate value for the average pressure may be P/K larger than about 10,000. Negative-index polytropic models of interstellar clouds in equilibrium with an external medium at these pressures are predicted to have sizes, line widths, masses, and size-line width and size-density relations in good agreement with those observed and inferred for dark clouds. Thus these observed features of interstellar clouds do not require that they be completely self-gravitating or 'virialized' in the commonly used sense.

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