X‐Rays from Accelerated Ion Interactions | Zendy

V. Tatischeff | Zendy; R. Ramaty | Zendy; Benzion Kozlovsky | Zendy

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X‐Rays from Accelerated Ion Interactions

Author(s) -

V. Tatischeff,

R. Ramaty,

Benzion Kozlovsky

Publication year - 1998

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/306118

Subject(s) - physics , rosat , gamma ray , ion , observatory , astrophysics , range (aeronautics) , line (geometry) , spectral line , atomic physics , x ray , nuclear physics , astronomy , materials science , geometry , mathematics , quantum mechanics , composite material

We have developed in detail the theory of X-ray line and continuum productiondue to atomic interactions of accelerated ions, incorporating in ourcalculations information from a broad range of laboratory measurements. Weapplied our calculations to the Orion region from which nuclear gamma-ray lineswere observed with the COMPTEL instrument on CGRO. The accelerated particleswhich produce this gamma-ray emission via nuclear reactions also produce X-raylines via atomic interactions. We predict strong line emission in the rangefrom 0.5 to 1 keV, mainly due to de-excitations in fast O ions. While much ofthe diffuse X-ray emission observed with ROSAT from Orion could be due toaccelerated ions, the current X-ray data do not provide unambiguous signaturesfor such an origin. If future observations with high spectral resolution wouldconfirm the predicted X-rays, the combined analysis of the X-ray and gamma-raydata will set important constraints on the origin of the accelerated particlesand their interaction model.Comment: 26 pages, 14 figure

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