Interstellar gas in the GUM Nebula

Details Interstellar gas in the GUM Nebula Interstellar gas in the GUM Nebula

Sep 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980apj...240..834w&link_type=abstract

Astrophysical Journal, Part 1, vol. 240, Sept. 15, 1980, p. 834-845.

Astronomy and Astrophysics

Astronomy

45

Gum Nebula, Interstellar Gas, Optical Measurement, Ultraviolet Astronomy, Astronomical Catalogs, Calcium, Gas Ionization, H Ii Regions, Line Spectra, Sodium

Scientific paper

A survey of the interstellar gas near the Gum Nebula by optical observation of 67 stars at Ca II, 42 stars at Na I, and 14 stars in the UV with the Copernicus satellite provided radial velocities and column densities for all resolved absorption components. Velocity dispersions for gas in the Gum Nebula are not significantly larger than in the general interstellar medium; the ionization structure is predominantly that of an H II region with moderately high ionization. Denser, more highly ionized clouds are concentrated toward the Gum Nebula; these clouds do not show the anomalously high ionization observed in the Vela remnant clouds.

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