Current Status of X-ray Spectroscopy and Relevant Atomic Data

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Title:		Current Status of X-ray Spectroscopy and Relevant Atomic Data
Authors:		Behar, E.
Publication:		High Resolution X-ray Spectroscopy with XMM-Newton and Chandra, Proceedings of the international workshop held at the Mullard Space Science Laboratory of University College London, Holmbury St Mary, Dorking, Surrey, UK, October 24 - 25, 2002, Ed. Branduardi-Raymont, G., published electronically and stored on CD., meeting abstract
Publication Date:		12/2002
Origin:		AUTHOR
Bibliographic Code:		2002hrxs.confE...3B

Abstract

With the advent of the high-resolution grating spectrometers on board the Chandra and XMM-Newton observatories, X-ray spectroscopy has become the most powerful tool for X-ray measurements in space. The increasing role of spectroscopy has naturally drawn attention to the relevant atomic physics and atomic data, as those are directly linked with our ability to draw meaningful conclusions from observed spectra. A review of the atomic data needs for analyzing cosmic X-ray spectra is presented including the various line-excitation mechanisms. The adequacy of the existing data is assessed. In general, a combination of state-of-the-art atomic codes and high precision laboratory measurements provide a reasonable description of the overwhelming majority of cosmic spectra. However, in a few intriguing cases, non-standard models and special laboratory measurements are still required, examples of which are the 2p - 3s lines of Fe-L ions and inner-shell absorption lines of low-Z elements.

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