Volume 652, August 2021
|Number of page(s)||2|
|Section||Letters to the Editor|
|Published online||04 August 2021|
Letter to the Editor
The unidentified infrared bands and the spectrum of atomic hydrogen
Fondation Louis de Broglie, 23 rue Marsoulan, 75012 Paris, France
Accepted: 20 July 2021
This letter compares the footprints on a spectral axis of the main unidentified infrared emission bands (UIBs) with the recombination lines of atomic hydrogen. The comparison shows striking correspondences, suggesting that atomic hydrogen may be involved in the production of UIBs.
Key words: ISM: lines and bands / ISM: general / astrochemistry
© ESO 2021
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