Discovery of heavy negative ions in Titan's ionosphere
作者： A. J. Coates , F. J. Crary , G. R. Lewis , D. T. Young , J. H. Waite
DOI: 10.1029/2007GL030978
关键词: Electron spectrometer 、 Electron 、 Ion 、 Titan (rocket family) 、 Atomic physics 、 Population 、 Ionosphere 、 Physics 、 Tholin 、 Aerosol
摘要: [1] Titan's ionosphere contains a rich positive ion population including organic molecules. Here, using CAPS electron spectrometer data from sixteen Titan encounters, we reveal the existence of negative ions. These ions, with densities up to ∼100 cm−3, are in mass groups 10–30, 30–50, 50–80, 80–110, 110–200 and 200+ amu/charge. During one low encounter, ions per charge as high 10,000 amu/q seen. Due their unexpectedly at ∼950 km altitude, these must play key role chemistry they may be important formation organic-rich aerosols (tholins) eventually falling surface.
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