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Dukes C, Hurley D. Sampling the Moon's atmosphere. Science 2016; 351:230-1. [DOI: 10.1126/science.aad8245] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
In situ measurements reveal details of the production and evolution of the lunar exosphere
[Also see Report by
Colaprete
et al.
]
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Affiliation(s)
- Catherine Dukes
- Laboratory for Astrophysics and Surface Physics, University of Virginia, Charlottesville, VA 22904, USA
| | - Dana Hurley
- Applied Physics Laboratory, Johns Hopkins University, Laurel, MD 20723, USA
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Colaprete A, Sarantos M, Wooden DH, Stubbs TJ, Cook AM, Shirley M. Lunar atmosphere. How surface composition and meteoroid impacts mediate sodium and potassium in the lunar exosphere. Science 2015; 351:249-52. [PMID: 26678876 DOI: 10.1126/science.aad2380] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2015] [Accepted: 11/30/2015] [Indexed: 11/03/2022]
Abstract
Despite being trace constituents of the lunar exosphere, sodium and potassium are the most readily observed species due to their bright line emission. Measurements of these species by the Ultraviolet and Visible Spectrometer (UVS) on the Lunar Atmosphere and Dust Environment Explorer (LADEE) have revealed unambiguous temporal and spatial variations indicative of a strong role for meteoroid bombardment and surface composition in determining the composition and local time dependence of the Moon's exosphere. Observations show distinct lunar day (monthly) cycles for both species as well as an annual cycle for sodium. The first continuous measurements for potassium show a more repeatable variation across lunations and an enhancement over KREEP (Potassium Rare Earth Elements and Phosphorus) surface regions, revealing a strong dependence on surface composition.
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Affiliation(s)
- A Colaprete
- Space Science Division, NASA Ames Research Center, Moffett Field, Mountain View, CA, USA.
| | - M Sarantos
- Heliophysics Science Division, NASA Goddard Space Flight Center, Greenbelt, MD, USA. University of Maryland, Baltimore County, Baltimore, MD, USA
| | - D H Wooden
- Space Science Division, NASA Ames Research Center, Moffett Field, Mountain View, CA, USA
| | - T J Stubbs
- Solar System Exploration Division, NASA Goddard Space Flight Center, Greenbelt, MD, USA
| | - A M Cook
- Space Science Division, NASA Ames Research Center, Moffett Field, Mountain View, CA, USA. Millennium Engineering and Integration Services, Moffett Field, CA 94035, USA
| | - M Shirley
- Space Science Division, NASA Ames Research Center, Moffett Field, Mountain View, CA, USA
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Yakshinskiy BV, Madey TE. Electron- and photon-stimulated desorption of K from ice surfaces. ACTA ACUST UNITED AC 2001. [DOI: 10.1029/2000je001345] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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