NASA NTRS · 19720040997
Interferometric studies of interstellar calcium lines.
Abstract
Review of interferometric, photoelectric scans of the interstellar calcium K-lines in the spectra of 65 stars. The scans were obtained with a PEPSIOS spectrometer having a passband with a full half-intensity width of 1.0 km/sec or 0.013 A. The fivefold improvement in resolution over that used by Adams reveals numerous line components which correspond very well to those of the interstellar sodium lines, apart from frequent differences in relative intensities.
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Marschall, L. A., Hobbs, L. M.. 1972-04-01. Interferometric studies of interstellar calcium lines.. https://ntrs.nasa.gov/citations/19720040997
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