Astronomy and Astrophysics – Astrophysics
Scientific paper
Sep 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981apj...248..945s&link_type=abstract
Astrophysical Journal, Part 1, vol. 248, Sept. 15, 1981, p. 945-955.
Astronomy and Astrophysics
Astrophysics
37
Flow Velocity, Interstellar Gas, Magellanic Clouds, Radial Velocity, Stellar Spectra, Absorption Spectra, Astronomical Models, Calcium, Line Spectra, Milky Way Galaxy
Scientific paper
An attempt is made to form a coherent picture of the velocity structure of gas along the line of sight constituted by the Small and Large Magellanic Clouds and foreground objects, by means of a survey of the Ca K and Na D visual absorption lines and existing UV and visual absorption-line data. It is confirmed that large sheets of intervening material at intermediate velocities are present, but ambiguities remain in the interpretation of this gas as a hot but cooling galactic halo whose properties are closely constrained. The line of sight to the Magellanic Clouds may contain material at intermediate velocities corresponding to gas perturbed by the gravitational field of the galaxy, but marginally bound to the Magellanic Clouds. Two lines of sight, toward the 30 Doradus region and toward the SNR N206, are singled out for special discussion because they show substantial velocity structure.
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