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          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents



ID: 693892.0, MPI für Astronomie / Publikationen_mpia
Detection of a noble gas molecular ion, 36ArH+, in the Crab Nebula
Authors:Barlow, M. J.; Swinyard, B. M.; Owen, P. J.; Cernicharo, J.; Gomez, H. L.; Ivison, R. J.; Krause, O.; Lim, T. L.; Matsuura, M.; Miller, S.; Olofsson, G.; Polehampton, E. T.
Date of Publication (YYYY-MM-DD):2013
Title of Journal:Science
Volume:342
Issue / Number:6164
Start Page:1343
End Page:1345
Audience:Not Specified
Abstract / Description: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.
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für Astronomie
Identifiers:ISSN:0036-8075
URL:http://cdsads.u-strasbg.fr/abs/2013Sci...342.1343B
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