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Interstellar bubbles
Castor, J.; McCray, R.; Weaver, R.
AA(Joint Institute for Laboratory Astrophysics, Boulder, Colo.), AB(Colorado, University, Boulder, Colo.), AC(Joint Institute for Laboratory Astrophysics, Boulder, Colo.)
Astrophysical Journal, vol. 200, Sept. 1, 1975, pt. 2, p. L107-L110. (ApJL Homepage)
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NASA/STI Keywords:
Bubbles, Early Stars, Interstellar Gas, Stellar Winds, Density Distribution, Gas Dynamics, Hydrogen Clouds, Interstellar Matter, Space Density, Stellar Envelopes, Stellar Evolution
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Early-type stars blow bubbles in the interstellar medium. The radii of the bubbles are typically 30 pc. Typical conditions in their interiors are temperatures of about 1 million K and densities of about 0.01 per cu cm. The dense shell of swept-up interstellar gas that surrounds them is likely to trap the ionization front and may also have an outer layer of H2. The column density of O VI in the interior is in accord with observations by the Copernicus ultraviolet telescope.

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