Very high resolution profiles of four diffuse interstellar bands

Astronomy and Astrophysics – Astronomy

Scientific paper

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Ism: Clouds, Ism: Molecules

Scientific paper

Ultra-high-resolution (R~ 300000) profiles of four diffuse interstellar bands (DIBs) are presented. The λλ 5797-, 5850-, 6196- and 6379-Å DIBs were observed towards the reddened supergiant HD 24398, a line of sight free of Doppler splitting; thus the observed profiles can be considered as intrinsic to the DIB carriers. Three of the profiles show substructure which supports the hypothesis of a molecular origin for these DIBs.

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