You are currently viewing the figures only.
View Full TextLog in to view the full text
AAAS login provides access to Science for AAAS members, and access to other journals in the Science family to users who have purchased individual subscriptions.
Register for free to read this article
As a service to the community, this article is available for free. Existing users log in.
More options
Download and print this article for your personal scholarly, research, and educational use.
Buy a single issue of Science for just $15 USD.
Fig. 1 ENA spectra from several regions. Measurements were transformed into the rest frame of the Sun. Average fluxes from 24° longitude × 12° latitude areas in longitudinal slices centered on the heliospheric (A) nose (λ = 255°), (B) tail, and (C) right flank (60° from the nose) are shown. The green spectra are from low ecliptic latitudes (–30° ≤ β ≤ 30°), and the blue and red spectra are from northern (β ≥ 54°) and southern (β ≤ –54°) polar regions, respectively. The low-latitude spectra with the highest flux in (A) and (C) are from latitudes centered on –12° and –24° and contain the ribbon. The north latitude spectra with the highest flux in (B) also contain the ribbon. (D) Spectra from 20° × 20° regions centered on the nose (red) and tail (blue) and fit over nine energy passbands of IBEX. Typical error bars in (D) represent counting statistics and systematic errors of ±20% for IBEX-Hi and ±30% for IBEX-Lo.
Fig. 2 Global spectral variation with latitude and within the ribbon. The variance-weighted mean of κ for the ribbon (red) and globally distributed flux outside the ribbon (black) are calculated using three adjacent IBEX-Hi energy passbands centered on (A) 1.7 keV and (B) 2.7 keV. Error bars represent errors in the weighted mean. The 2.7-keV ENA flux map (C) is centered on ecliptic (λ, β) = (221°, 39°) and shows three regions of the ribbon. (D) Spectra from these three regions are derived from the average ENA flux in areas 6° in longitude by 18° in latitude centered on the ribbon.
Fig. 3 The product of the ion pressure ΔPion in the heliosheath and the radial thickness L of the ENA emission in units of pdynes cm−2 AU over the energy range from 0.2 to 6 keV that includes the 0.44-keV passband of IBEX-Lo and the 0.7-, 1.1-, 1.7-, 2.7-, and 4.3-keV passbands of IBEX-Hi. The black swath is data removed because of poor statistics in the IBEX-Lo energy passband.
