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On the Detection of HeH+ in the Interstellar Medium
R. Güsten, H. Wiesemeyer, D. Neufeld, K. M. Menten, U. U. Graf, K. Jacobs,
B. Klein, O. Ricken, C. Risacher, and J. Stutzki,
reported on the
Astrophysical detection of the helium hydride ion HeH<sup>+</sup>
Nature 568, 357 (2019).
The J = 1 − 0 transition at 2.0102 THz was detected
in emission toward the NGC 7027 photo-dissociation region (PDR) with the upGREAT
instrument using the SOFIA airplane. The column density is quite close to model
calculations; interestingly, about a factor of four was detected compared to
the expectations.
See also the MPIfR press release (in English; German version also available).
Contributor(s): H. S. P. Müller; 04, 2019