High Rydberg state carbon recombination lines from interstellar clouds
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Astronomical Society of the Pacific
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We report observations of carbon recombination lines near 34.5 MHz (qunatum number n=578) and 325 MHz (n=272) made towards Cas A, the Galactic centre and about ten other directions in the galactic plane. Constraints on the physical conditions in the line forming regions are derived from these and other existing observations. The CII regions that produce the low-frequency lines are most likely associated with the neutral HI component of the ISM.
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Restricted Access. An open access version is available at NASA ADS. New Perspectives on the Interstellar Medium, ASP Conference Series 168, Eds. A. R. Taylor, T. L. Landecker, and G. Joncas. Astronomical Society of the Pacific (San Francisco), 1999.
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New Perspectives on the Interstellar Medium, ASP Conference Series Vol.168, p197, 1999.
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1999 Astronomical Society of the Pacific