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Published April 15, 1974 | Published
Journal Article Open

On the velocity structure of the interstellar clouds near rho Ophiuchi

Abstract

Accurate radial velocities of the optical interstellar features for some of the B stars embedded in the ρ Oph complex are obtained by averaging results of several photographic high-dispersion spectra. In at least one case, there is a real difference between the radial velocity of the atomic features (Na i and Ca ii) and the molecular ones (CH and CN). We show that it is probable that the CH and CN are concentrated either in a separate cloud (i.e., region of space) from the Ca ii and Na i or in a cloud whose outer parts are expanding rather than in a single cloud which is contracting or rotating.

Additional Information

© American Astronomical Society • Provided by the NASA Astrophysics Data System. Received 1973 October 17; revised 1973 December 18. One of us (G. W.) acknowledges support under NSF grant GP-28882, Al. J. G. C. is pleased to thank the Miller Foundation and the Astronomy Department of the University of California at Berkeley for support and hospitality during the early stages of this research.

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August 19, 2023
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