Opacity and conductivity measurements in noble gases at conditions of planetary and stellar interiors
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- R. Stewart McWilliams
- Geophysical Laboratory, Carnegie Institution of Washington, Washington, DC 20015;
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- D. Allen Dalton
- Geophysical Laboratory, Carnegie Institution of Washington, Washington, DC 20015;
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- Zuzana Konôpková
- Deutsches Elektronen-Synchrotron Photon Science, 22607 Hamburg, Germany;
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- Mohammad F. Mahmood
- Geophysical Laboratory, Carnegie Institution of Washington, Washington, DC 20015;
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- Alexander F. Goncharov
- Geophysical Laboratory, Carnegie Institution of Washington, Washington, DC 20015;
書誌事項
- 公開日
- 2015-06-16
- 権利情報
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- http://www.pnas.org/site/misc/userlicense.xhtml
- DOI
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- 10.1073/pnas.1421801112
- 公開者
- National Academy of Sciences
この論文をさがす
説明
<jats:title>Significance</jats:title> <jats:p>Planets and stars contain matter at extreme pressures and temperatures hidden deep beneath their opaque surfaces. Unable to see these states of matter directly, we instead produce them in laboratory experiments. Here a novel method of studying extreme states in a tabletop experiment is described and applied to common planet- and star-forming materials, the noble gases. Helium, neon, argon, and xenon transform in the experiments from transparent electrical insulators to opaque electrical conductors. In Saturn, rain composed of noble gas becomes conductive as it falls and can form a protective layer around the planetary core that prevents the core from dissolving into surrounding metallic hydrogen. White dwarf stars have unexpectedly opaque helium atmospheres, causing them to age slower than anticipated.</jats:p>
収録刊行物
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- Proceedings of the National Academy of Sciences
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Proceedings of the National Academy of Sciences 112 (26), 7925-7930, 2015-06-16
National Academy of Sciences
