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X-ray absorption via Kα resonance complexes in oxygen ions

Please use this identifier to cite or link to this item: http://hdl.handle.net/1811/44615

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Title: X-ray absorption via Kα resonance complexes in oxygen ions
Creators: Nahar, Sultana Nurun; Pradhan, Anil K.; Chen, Guo Xin; Delahaye, Franck; Oelgoetz, Justin
Keywords: atomic data
atomic processes
line -- profiles
galaxies -- Seyfert
X-rays -- galaxies
Issue Date: 2003-06
Citation: Pradhan, Anil K., Chen, Guo Xin, Delahaye, Franck, Nahar, Sultana Nurun, Oelgoetz, Justin. "X-ray absorption via Kα resonance complexes in oxygen ions," Monthly Notices of the Royal Astronomical Society, v. 341, no. 4, 2003, pp. 1268-1271.
DOI: 10.1046/j.1365-8711.2003.06513.x
Abstract: The Kα resonance complexes in oxygen ions OI–O VI are theoretically computed, and resonance oscillator strengths and wavelengths are presented. The highly resolved photoionization cross-sections, with relativistic fine structure, are computed in the coupled channel approximation using the Breit–Pauli R-matrix method. A number of strong Kα resonances are found to be appreciable, with resonance oscillator strengths f_r > 0.1. The Kα resonance wavelengths of OI–O VI lie in the relatively narrow wavelength range 22–23.5 Å, and the X-ray opacity in this region should therefore be significantly affected by K → L transitions in oxygen. The results should be useful in the interpretation of soft X-ray spectra observed from Chandra and XMM–Newton.
Description: Relevant data is available at: http://www.astronomy.ohio-state.edu/~nahar/nahar_radiativeatomicdata/index.html
The definitive version is available at www.blackwell-synergy.com. http://www3.interscience.wiley.com/journal/118873458/abstract
ISSN: 1365-2966
URI: http://hdl.handle.net/1811/44615
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