EFFECTS OF FAST AND SLOW SOLAR WIND ON THE ENERGETIC NEUTRAL ATOM (ENA) SPECTRA MEASURED BY THE INTERSTELLAR BOUNDARY EXPLORER (IBEX) AT THE HELIOSPHERIC POLES
作者： M. A. Dayeh , D. J. McComas , F. Allegrini , B. De Majistre , M. I. Desai
DOI: 10.1088/0004-637X/749/1/50
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摘要: We study the energy dependence of ~0.5-6 keV energetic neutral atom (ENA) spectra in southern heliospheric polar region obtained during five six-month sky maps measured by IBEX-Hi. calculate spectral slopes south pole four different bands, namely, ~0.7-1.1 keV, ~1.1-1.7 ~1.7-2.7 and ~2.7-4.3 keV. show (1) a persistent flattening ENA spectrum between ~1 2 (2) significantly modes (2.31, 1.58, 0.97, 1.44) for distributions (3) general decrease with increasing widths (FWHM) mode fluctuations (their spread) slope distributions. also compare averaged at mid-latitudes. conclude that (spectral break) is produced an enhancement ENAs created charge exchange interstellar neutrals pick-up ions fast solar wind.
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