Charge exchange between highly charged ions and atomic H for modelling comet C/1999 S4 X-ray emission
Monthly Notices of the Royal Astronomical Society, vol. 520, pp. 1417–1420
Abstract
ABSTRACT Solar wind (SW) charge exchange (CX) is an important mechanism responsible for X-ray emissions in comets’ coma and many other astrophysical environments. By incorporating the experimentally derived total cross-sections and the tested state-selectivity models into the Kronos program, we generate X-ray spectra in H-like and fully stripped C, N, O ion CX collision with atomic H. Using these data, we revisit the fitting of Chandra X-ray data of Comet C/1999 S4 by considering the typical SW collision energies of 0.8 and 3 keV/u, respectively. Our results are in an excellent agreement with the astrophysical observation. We find that charge exchange between C5+,6+, N6+,7+, O7+,8+ and H significantly contributes to the comet’s spectrum ranging from 300 to 800 eV for both slow and fast SW ions, where N7+ abundance is underestimated in previous studies.
Authors 9
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R. T. Zhang corresponding
Chinese Academy of Sciences · Institute of Modern Physics · University of Chinese Academy of Sciences
Affiliation as printed
Institute of Modern Physics, Chinese Academy of Sciences , Lanzhou 730000, China
University of Chinese Academy of Sciences , Beijing 100049, China
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Affiliation as printed
Sino-French Institute of Nuclear Engineering and Technology, Sun Yat-sen University , Zhuhai 519082, China
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Chinese Academy of Sciences · Institute of Modern Physics · University of Chinese Academy of Sciences
Affiliation as printed
Institute of Modern Physics, Chinese Academy of Sciences , Lanzhou 730000, China
University of Chinese Academy of Sciences , Beijing 100049, China
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Chinese Academy of Sciences · Institute of Modern Physics · University of Chinese Academy of Sciences
Affiliation as printed
Institute of Modern Physics, Chinese Academy of Sciences , Lanzhou 730000, China
University of Chinese Academy of Sciences , Beijing 100049, China
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Chinese Academy of Sciences · Institute of Modern Physics · University of Chinese Academy of Sciences
Affiliation as printed
Institute of Modern Physics, Chinese Academy of Sciences , Lanzhou 730000, China
University of Chinese Academy of Sciences , Beijing 100049, China
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Space Research Organisation Netherlands
Affiliation as printed
SRON Netherlands Institute for Space Research , Niels Bohrweg 4, 2333 CA Leiden, the Netherlands
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Chinese Academy of Sciences · Institute of Modern Physics · University of Chinese Academy of Sciences
Affiliation as printed
Institute of Modern Physics, Chinese Academy of Sciences , Lanzhou 730000, China
University of Chinese Academy of Sciences , Beijing 100049, China
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Chinese Academy of Sciences · Institute of Modern Physics · University of Chinese Academy of Sciences
Affiliation as printed
Institute of Modern Physics, Chinese Academy of Sciences , Lanzhou 730000, China
University of Chinese Academy of Sciences , Beijing 100049, China
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X. Ma corresponding
Chinese Academy of Sciences · Institute of Modern Physics · University of Chinese Academy of Sciences
Affiliation as printed
Institute of Modern Physics, Chinese Academy of Sciences , Lanzhou 730000, China
University of Chinese Academy of Sciences , Beijing 100049, China
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