# The Solar Wind Charge-eXchange Contribution to the Local Soft X-ray Background: Model to Data Comparison in the 0.1-1.0 keV Band

 Title: The Solar Wind Charge-eXchange Contribution to the Local Soft X-ray Background: Model to Data Comparison in the 0.1-1.0 keV Band Author: Koutroumpa, Dimitra; Lallement, Rosine; Kharchnko, Vasili; Dalgarno, Alexander Note: Order does not necessarily reflect citation order of authors. Citation: Koutroumpa, Dimitra, Rosine Lallement, Vasili Kharchenko, and Alex Dalgarno. 2008. The solar wind charge-eXchange contribution to the local soft X-ray background: model to data comparison in the 0.1-1.0 keV band. Space Science Reviews 143(1-4): 217-230. Full Text & Related Files: Delgarno - Solar Wind Charge-eXchange.pdf (279.5Kb; PDF) Abstract: The major sources of the Soft X-ray Background (SXRB), besides distinct structures as supernovae and superbubbles (e.g. Loop I), are: (i) an absorbed extragalactic emission following a power law, (ii) an absorbed thermal component $$(\sim 2×10^6)$$ K) from the galactic disk and halo, (iii) an unabsorbed thermal component, supposedly at 106 K, attributed to the Local Bubble and (iv) the very recently identified unabsorbed Solar Wind Charge-eXchange (SWCX) emission from the heliosphere and the geocorona We study the SWCX heliospheric component and its contribution to observed data. In a first part, we apply a SWCX heliospheric simulation to model the oxygen lines $$(\frac{3}{4} keV)$$ local intensities during shadowing observations of the MBM 12 molecular cloud and a dense filament in the south galactic hemisphere with Chandra, XMM-Newton, and Suzaku telescopes. In a second part, we present a preliminary comparison of SWCX model results with ROSAT and Wisconsin surveys data in the $$(\frac{1}{4} keV)$$ band. We conclude that, in the $$(\frac{3}{4} keV)$$ band, the total local intensity is entirely heliospheric, while in the $$(\frac{1}{4} keV)$$ band, the heliospheric component seems to contribute significantly to the local SXRB intensity and has potentially a strong influence on the interpretation of the ROSAT and Wisconsin surveys data in terms of Local Bubble hot gas temperature. Published Version: doi:10.1007/s11214-008-9381-9 Other Sources: http://arXiv.org/pdf/0805.3212 Terms of Use: This article is made available under the terms and conditions applicable to Open Access Policy Articles, as set forth at http://nrs.harvard.edu/urn-3:HUL.InstRepos:dash.current.terms-of-use#OAP Citable link to this page: http://nrs.harvard.edu/urn-3:HUL.InstRepos:5131506 Downloads of this work: