The Spectrum of the Solar Wind Charge Exchange Emission: Contribution to the Soft X-ray Background
Résumé
Solar Wind Charge-Exchange (SWCX) is nowadays recognised as a non-negligible source of soft X-ray emission, contributing to an unknown degree to the diffuse soft X-ray background (SXRB). In this paper, we relate the general characteristics of the SWCX emission spectrum between 0.1 and 1 keV and its contribution to the local interstellar SXRB emission in comparison with the unabsorbed thermal component attributed to the supposedly hot (~106 K) Local Bubble. At low galactic latitudes (below ~30 degrees) our computed SWCX brightness reaches a level comparable to the observed signal, suggesting the absence or a very low pressure of the hot gas close to the disk