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Formation, Evolution and Destruction of Possible DIB Carriers: Dirty Molecular Hydrogen Ice Clusters

Published online by Cambridge University Press:  21 February 2014

D. K. Lynch ,
L. S. Bernstein  and
F. O. Clark
D. K. Lynch
Affiliation:
Thule Scientific, P.O. Box 953, Topanga CA 90290, USA email: [email protected]
L. S. Bernstein
Affiliation:
Spectral Sciences Inc., 4 Fourth Avenue, Burlington, MA 01803, USA email: [email protected]
F. O. Clark
Affiliation:
Spectral Sciences Inc., 4 Fourth Avenue, Burlington, MA 01803, USA email: [email protected]
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Abstract

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We suggest that the diffuse interstellar bands (DIBs) are absorption lines arising from electronic transitions in molecular clusters primarily composed of a single molecule, atom, or ion (“seed”), embedded in a single-layer shell of H2 molecules (Bernstein et al. 2013). We refer to these clusters as CHCs (Contaminated H2 Clusters). CHCs arise from cm-sized, dirty H2 ice balls, called CHIMPs (Contaminated H2 Ice Macro-Particles), formed in cold, dense, Giant Molecular Clouds (GMCs), and later released into the interstellar medium (ISM) upon GMC disruption. Absorption by the CHIMP of a UV photon releases CHCs. CHCs produce DIBs when they absorb optical photons. When this occurs, the absorbed photon energy disrupts the CHC.

Keywords

ISM: cloudsISM: lines and bandsISM: molecules
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 9 , Symposium S297: The Diffuse Interstellar Bands , May 2013 , pp. 381 - 382
Copyright
Copyright © International Astronomical Union 2014 

References

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