Abstract
The Copernicus satellite now opens up the ultraviolet region for inspection, and the number of resonance lines which may be studied has increased from 6, seen in the visible, to more than 30. The distribution and properties of an important constituent of the interstellar gas, molecular hydrogen, can be studied in detail using this instrument. A more comprehensive picture may now be developed for element depletion factors, electron densities, and sources of ionization (UV photons, low energy cosmic and X-rays).
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Jenkins, E.B. (1974). Line Absorption Studies of the Interstellar Gas Near 1015 Hz. In: Kerr, F.J., Simonson, S.C. (eds) Galactic Radio Astronomy. International Astronomical Union/ Union Astronomique Internationale, vol 60. Springer, Dordrecht. https://doi.org/10.1007/978-94-010-2263-7_5
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DOI: https://doi.org/10.1007/978-94-010-2263-7_5
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