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The predicted 1s 2-1s6p H− auto-ionization resonance observed as a diffuse interstellar line at 7581 Å

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Abstract

The 1s 2-1s6p H− auto-ionization resonance has been observed as a diffuse interstellar line in several highly reddened O and B stars. The identification based on its wavelength has been confirmed by its equivalent width in HD 183143. The addition of the 1s 2-1snp diffuse-line series raises the total H− oscillator strength of absorption to a value close to 2.

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Authors and Affiliations

  1. Astronomical Institute, University of Aarhus, Denmark

    P. Gammelgaard & M. Rudkjøbing

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  1. P. Gammelgaard
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  2. M. Rudkjøbing
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Gammelgaard, P., Rudkjøbing, M. The predicted 1s 2-1s6p H− auto-ionization resonance observed as a diffuse interstellar line at 7581 Å. Astrophys Space Sci 72, 319–322 (1980). https://doi.org/10.1007/BF00639141

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  • DOI: https://doi.org/10.1007/BF00639141

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