Barlow, MJ;
Swinyard, BM;
Owen, PJ;
Cernicharo, J;
Gomez, HL;
Ivison, RJ;
Krause, O;
... Polehampton, ET; + view all
(2013)
Detection of a noble gas molecular ion, 36ArH+, in the Crab Nebula.
Science
, 342
(6164)
1343 - 1345.
10.1126/science.1243582.
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Abstract
Noble gas molecules have not hitherto been detected in space. From spectra obtained with the Herschel Space Observatory, we report the detection of emission in the 617.5- and 1234.6-gigahertz J = 1-0 and 2-1 rotational lines of (36)ArH(+) at several positions in the Crab Nebula, a supernova remnant known to contain both molecular hydrogen and regions of enhanced ionized argon emission. Argon-36 is believed to have originated from explosive nucleosynthesis in massive stars during core-collapse supernova events. Its detection in the Crab Nebula, the product of such a supernova event, confirms this expectation. The likely excitation mechanism for the observed (36)ArH(+) emission lines is electron collisions in partially ionized regions with electron densities of a few hundred per centimeter cubed.
| Type: | Article |
|---|---|
| Title: | Detection of a noble gas molecular ion, 36ArH+, in the Crab Nebula |
| Location: | United States |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1126/science.1243582 |
| Publisher version: | http://dx.doi.org/10.1126/science.1243582 |
| Language: | English |
| Additional information: | This is the author’s version of the work. It is posted here by permission of the AAAS for personal use, not for redistribution. The definitive version was published in Science in Vol. 342 no. 6164 12/2013, DOI: 10.1126/science.1243582. |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Science and Technology Studies |
| URI: | https://discovery.ucl.ac.uk/id/eprint/1415687 |
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