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Title:
The diffuse interstellar bands. V - High-resolution observations
Authors:
Herbig, G. H.; Soderblom, D. R.
Affiliation:
AA(Lick Observatory, Santa Cruz, CA), AB(Lick Observatory, Santa Cruz, CA)
Publication:
Astrophysical Journal, Part 1, vol. 252, Jan. 15, 1982, p. 610-615. (ApJ Homepage)
Publication Date:
01/1982
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
A STARS, ASTRONOMICAL SPECTROSCOPY, B STARS, INTERSTELLAR MATTER, LINE SPECTRA, SUPERGIANT STARS, ATMOSPHERIC ATTENUATION, ATMOSPHERIC MOISTURE, POTASSIUM, RED SHIFT, SPECTRAL RESOLUTION
Comment:
A&AA ID. AAA031.131.014
DOI:
10.1086/159588
Bibliographic Code:
1982ApJ...252..610H

Abstract

The diffuse interstellar bands at 6195 and 6613 A and two new features at 6993 and 7223 A are observed with an echelle scanner in several reddened B-type and early A-type supergiants. The resolution is either 2.6 or 4.6 km/sec at 6613 A. When interfering atmospheric H2O lines are removed, no evidence is found in any of these features for any fine structure, although at 6613 A there is unsharp structure on the shortward side and an extended wing to longer wavelengths. The interstellar K I lines are also compared with that of the diffuse features. The sharpest diffuse band at 6195 A (full width at half-depth, 0.34 A) is in HD 183143 partially resolvable into two lines having the same splitting as K I. In similar fashion, the structure at 6613 A in HD 183143 is a blurred version of that seen in single-cloud stars; it also can be decomposed into two equal components having the K I separation.

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