Detection of a Noble Gas Molecular Ion, {36}ArH^+, in the Crab Nebula

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 GHz and 1234.6 GHz 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 H2 molecules and regions of enhanced ionized argon emission. {36}Ar 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.

Published in Science on 13th December 2013; 14 pages, 2 figures, 1 table

References in corpus (12)

• Herschel Space Observatory - An ESA facility for far-infrared and submillimetre astronomy
• The Herschel-SPIRE instrument and its in-flight performance
• Black hole accretion and star formation as drivers of gas excitation and chemistry in Mrk231
• In-flight calibration of the Herschel-SPIRE instrument
• A Cool Dust Factory in the Crab Nebula: A Herschel Study of the Filaments
• Herschel/HIFI observations of interstellar OH+ and H2O+ towards W49N: a probe of diffuse clouds with a small molecular fraction
• MESS (Mass-loss of Evolved StarS), a Herschel Key Program
• Submillimetre line spectrum of the Seyfert galaxy NGC1068 from the Herschel-SPIRE Fourier Transform Spectrometer
• Properties and Spatial Distribution of Dust Emission in the Crab Nebula
• A Survey of Molecular Hydrogen in the Crab Nebula
• H2 Temperatures in the Crab Nebula
• The Nature of [Ar III] Bright Knots in the Crab Nebula

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• Exploring the Possibility of Identifying Hydride and Hydroxyl Cations of Noble Gas Species in the Crab Nebula Filament
• Extending the view of ArH+ chemistry in diffuse clouds
• The HIFI spectral survey of AFGL 2591 (CHESS). II. Summary of the survey
• Electron-impact excitation of diatomic hydride cations II: OH${}^{+}$ and SH${}^{+}$
• A recent update of gas-phase chemical reactions and molecular lines in CLOUDY: its effects on millimeter and sub-millimeter molecular line predictions
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• The ortho-to-para ratio of interstellar NH${}_2$: Quasi-classical trajectory calculations and new simulations
• Fate and detectability of rare gas hydride ions in nova ejecta: A case study with nova templates
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