X-Rays from Accelerated Ion Interactions

Details X-Rays from Accelerated Ion Interactions X-Rays from Accelerated Ion Interactions

1998-04-24

arxiv.org/abs/astro-ph/9804269v1

ApJ 504 (1998)

Astronomy and Astrophysics

Astrophysics

26 pages, 14 figures

Scientific paper

10.1086/306118

We have developed in detail the theory of X-ray line and continuum production due to atomic interactions of accelerated ions, incorporating in our calculations information from a broad range of laboratory measurements. We applied our calculations to the Orion region from which nuclear gamma-ray lines were observed with the COMPTEL instrument on CGRO. The accelerated particles which produce this gamma-ray emission via nuclear reactions also produce X-ray lines via atomic interactions. We predict strong line emission in the range from 0.5 to 1 keV, mainly due to de-excitations in fast O ions. While much of the diffuse X-ray emission observed with ROSAT from Orion could be due to accelerated ions, the current X-ray data do not provide unambiguous signatures for such an origin. If future observations with high spectral resolution would confirm the predicted X-rays, the combined analysis of the X-ray and gamma-ray data will set important constraints on the origin of the accelerated particles and their interaction model.

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