B stars and the structure of the interstellar medium

Details B stars and the structure of the interstellar medium B stars and the structure of the interstellar medium

Feb 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976apl....17...81l&link_type=abstract

Astrophysical Letters, vol. 17, no. 2, 1976, p. 81-86.

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B Stars, Interstellar Gas, Space Environment Simulation, Stellar Envelopes, Astronomical Models, Electron Density (Concentration), Gas Density, H Ii Regions, Hydrodynamics, Hydrogen Ions

Scientific paper

If the low-density intercloud material is cold, as recent observations suggest, then the H II regions around B stars are very effective at moving the neutral gas about. A two-dimensional hydrodynamic simulation of such an interstellar medium was performed. On a short time scale, about 15 million yr, an initially uniform medium at a density of 1 per cu cm separates into low-density (not exceeding 0.1 per cu cm) and high-density (at least 3 per cu cm) regions. The low-density regions contain both hot ionized gas and cold unionized gas. The observed average electron density and the observed average statistics of clouds are well reproduced by the model.

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