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

by Swinyard, B. M. , Owen, P. J. , Gomez, H. L. , Ivison, R. J. , Polehampton, E. T. , Miller, S. , Olofsson, G. , Cernicharo, J. , Lim, T. L. , Matsuura, M. , Krause, O. , Barlow, M. J.

in Argon / Astrobiology / Astrochemistry / Astronomy / Astrophysics / Carbon / Chemical elements / Crab nebula / Crabs / Earth, ocean, space / Electrons / Emission spectra / Emissions / Exact sciences and technology / Explosions / Explosive forming / hydrogen / Interstellar medium (ism) and nebulae in milky way / Line spectra / Nebulae / nitrogen / oxygen / Phosphorus / Radial velocity / Space based observatories / spectroscopy / Stars / Stars & galaxies / Stellar systems. Galactic and extragalactic objects and systems. The universe / Sulfur / Supernova remnants / telescopes / Velocity

2013

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

by Swinyard, B. M. , Owen, P. J. , Gomez, H. L. , Ivison, R. J. , Polehampton, E. T. , Miller, S. , Olofsson, G. , Cernicharo, J. , Lim, T. L. , Matsuura, M. , Krause, O. , Barlow, M. J.

2013

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

by Swinyard, B. M. , Owen, P. J. , Gomez, H. L. , Ivison, R. J. , Polehampton, E. T. , Miller, S. , Olofsson, G. , Cernicharo, J. , Lim, T. L. , Matsuura, M. , Krause, O. , Barlow, M. J.

2013

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Journal Article

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

Swinyard, B. M.,

Owen, P. J.,

Gomez, H. L.,

Ivison, R. J.,

Polehampton, E. T.,

Miller, S.,

Olofsson, G.,

Cernicharo, J.,

Lim, T. L.,

Matsuura, M.,

Krause, O.,

Barlow, M. J.

2013

Overview

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.

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Publisher

American Association for the Advancement of Science,The American Association for the Advancement of Science

Subject

/ Carbon