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Diffuse Interstellar Band Formation in Dense Clouds

Snow, Theodore P., Jr. and Cohen, Judith G. (1976) Diffuse Interstellar Band Formation in Dense Clouds. In: Solid State Astrophysics. Astrophysics and Space Science Library. No.55. Springer , Dordrecht, pp. 33-38. ISBN 9789401018869.

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Measurements of the strengths of the diffuse interstellar bands at 4430, 5780 and 5797 Å show that the bands tend to be weak with respect to extinction in dense interstellar clouds. Data on 10 stars in the Q Ophiuchi cloud complex show further that the diffuse band-producing efficiency of the grains decreases systematically with increasing grain size. It is concluded that the diffuse bands are not formed in the mantles which accrete on the grains in interstellar clouds, but that they could be produced in the cores of grains or in some molecular species.

Item Type:Book Section
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Cohen, Judith G.0000-0002-8039-4673
Additional Information:© D. Reidel Publishing Company, Dordrecht, Holland 1976. We acknowledge with pleasure the kind assistance of Dr S. E. Strom, who provided diffuse band data on 5 stars, and Dr G. Wallerstein, who provided plates of some of the (Q Oph cloud stars. One of us (T.P.S.) carried out a portion of this study while he was a Predoctoral Research Associate at the University of Washington, where this work was supported in part by the Graduate School Research Fund of the University of Washington, and in part by National Science Foundation grant GP28881. The work done at Princeton was supported by National Aeronautics and Space Administration contract NAS5-1810.
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University of WashingtonUNSPECIFIED
Subject Keywords:Equivalent Width; Outer Portion; Dense Cloud; Interstellar Cloud; Maximum Polarization
Series Name:Astrophysics and Space Science Library
Issue or Number:55
Record Number:CaltechAUTHORS:20190529-161904766
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:95926
Deposited By: George Porter
Deposited On:31 May 2019 15:46
Last Modified:16 Nov 2021 17:16

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