Warm hydrogen at high galactic latitudes

Details Warm hydrogen at high galactic latitudes Warm hydrogen at high galactic latitudes

Aug 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982apj...259..591h&link_type=abstract

Astrophysical Journal, Part 1, vol. 259, Aug. 15, 1982, p. 591-594.

Astronomy and Astrophysics

Astrophysics

2

Abundance, Equations Of State, Gas Ionization, Gas Temperature, Hydrogen Clouds, Milky Way Galaxy, Astronomical Models, Halos, Hydrogen Ions, Hydroxyl Radicals, Interstellar Matter

Scientific paper

The physical state of gas in the transition zones between halo clouds and the hot coronal gas is investigated, and the equation of state is calculated. If H2 forms efficiently on grain surfaces, its action as a coolant can maintain an observable amount of gas at a temperature near 1000 K for a number density of the order of 1 cu cm. It is suggested that the warm H I observed at high galactic latitudes resides in these warm transition zones. The abundances of H2, OH, and CH(+) in the transition zones are discussed.

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