Argon auroral emissions |
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| Authors: | G B Burns P F B Williams R P Lowe W J R French P A Greet D P Monselesan |
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| Institution: | 1. Department of Environmental Engineering, Kyungpook National University, 80 Daehak-ro, Buk-gu, Daegu 41566, Republic of Korea;2. Radioactive Waste Disposal R&D Department, Korea Radioactive Waste Agency, 174 Gajeong-ro, Yuseong-gu, Daejeon 34129, Republic of Korea;3. Department of Environmental Engineering, Kangwon National University, Chuncheon, Gangwon 24341, Republic of Korea;1. School of Physical Sciences, The Open University, Milton Keynes, UK;2. Space Science and Technology Department, STFC Rutherford Appleton Laboratory, Chilton, Oxfordshire OX11 0QX, UK;3. Jet Propulsion Laboratory, California Institute of Technology, Pasadena, 91109, USA;4. School of Life Sciences, University of Westminster, London, UK |
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| Abstract: | Argon is the third most abundant constituent of the atmosphere, but has not been previously detected by any ground-based optical remote sensing method. We report observation of argon emissions at λ840.82 and λ842.46 nm during intense aurora. These are most likely excited by direct electron impact. The maximum argon intensity observed is 270 R. Argon is the fifth elemental emission conclusively observed in geo-aurora, joining N, O, H and He. |
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| Keywords: | Argon aurora Hydroxyl airglow |
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