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Are Carbon Clusters the Cause of Interstellar Diffuse Bands?

Published online by Cambridge University Press:  07 August 2017

S P Tarafdar ,
K S Krishna Swamy ,
C. Badrinathan  and
D. Mathur
S P Tarafdar
Affiliation:
Tata Institute of Fundamental Research Homi Bhabha Road Bombay 400 005, INDIA
K S Krishna Swamy
Affiliation:
Tata Institute of Fundamental Research Homi Bhabha Road Bombay 400 005, INDIA
C. Badrinathan
Affiliation:
Tata Institute of Fundamental Research Homi Bhabha Road Bombay 400 005, INDIA
D. Mathur
Affiliation:
Tata Institute of Fundamental Research Homi Bhabha Road Bombay 400 005, INDIA

Abstract

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Theoretically determined vertical excitation energies of C5 and C7 molecules have been shown to agree with the strongest diffuse interstellar band at 4430Å. Several other weak diffuse bands can be identified with vibrational transitions, if 4430Å band is taken as 0-3 transition and vibrational constant have a value of 2190cm−1. The vertical excitation energy of a second electronic transition of C7 molecule agrees with diffuse band at 6177Å. This electronic band system may account for diffuse bands at 5778Å, 6660Å and other bands near them.

Type
Diffuse, Translucent and High-Latitude Clouds
Information
Symposium - International Astronomical Union , Volume 150: Astrochemistry of Cosmic Phenomena , 1992 , pp. 139 - 141
Copyright
Copyright © Kluwer 1992 

References

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