Laboratory studies of diffuse interstellar band carriers

Astronomy and Astrophysics – Astronomy

Scientific paper

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Diffuse Interstellar Bands

Scientific paper

Diffuse interstellar bands (DIBs) are unidentified absorption bands detected in the optical region toward diffuse clouds. During a laboratory experiment to reproduce the DIBs using a slit-type pulsed-discharge supersonic-jet system, a non-linear carbon chain molecule was accidentally detected by absorption spectroscopy. This molecule and its related species can be expected as carriers of the DIBs. Thus additional three non-linear carbon chain molecules were measured by the same apparatus. We have made attempts to assign the DIBs by the molecules. Upper limits of abundance for the molecules in diffuse clouds were determined.

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