Barlow, M. J., Swinyard, B. M., Owen, P. J., Cernicharo, J., Gomez, Haley Louise ![]() ![]() |
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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 36ArH+ 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 36ArH+ emission lines is electron collisions in partially ionized regions with electron densities of a few hundred per centimeter cubed.
Item Type: | Article |
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Date Type: | Publication |
Status: | Published |
Schools: | Physics and Astronomy |
Subjects: | Q Science > QB Astronomy Q Science > QC Physics |
Publisher: | American Association for the Advancement of Science |
ISSN: | 0036-8075 |
Last Modified: | 17 Nov 2024 03:30 |
URI: | https://orca.cardiff.ac.uk/id/eprint/53925 |
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