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Proceedings Paper

Diffuse interstellar band from the spectrum of auto-ionizing helium
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Paper Abstract

We explore the possibility of using transition energies of a doubly excited helium atom to describe the absorption lines of interstellar medium. We follow the method of approximated separation of variables in hypersperical coordinate in solving the energy levels of doubly excited helium. Although the results do not exactly match with the absorption spectrum of the diffuse interstellar bands, they show some correlation. We have also shown that the distribution of the difference between observed spectrum and the calculated result can be fit by normal distribution with the mean value close to zero. Furthermore, we argued that the distribution obtained from randomly generated lines are significantly different from the calculated result.

Paper Details

Date Published: 11 March 2020
PDF: 7 pages
Proc. SPIE 11331, Fourth International Conference on Photonics Solutions (ICPS2019), 113310N (11 March 2020); doi: 10.1117/12.2550805
Show Author Affiliations
Aekawit Kittiya, Chiang Mai Univ. (Thailand)
Apimook Watcharangkool, National Astronomical Research Institute of Thailand (Thailand)
Suwicha Wannawichian, National Astronomical Research Institute of Thailand (Thailand)
Chiang Mai Univ. (Thailand)
Waranont Anukool, Chiang Mai Univ. (Thailand)

Published in SPIE Proceedings Vol. 11331:
Fourth International Conference on Photonics Solutions (ICPS2019)
Tetsuya Kawanishi; Surachet Kanprachar; Waranont Anukool; Ukrit Mankong, Editor(s)

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