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Chandra and XMM-Newton: Atomic Data Needs For X-ray AstronomyWith the launches of the Chandra X-ray Observatory and XM M-Newton, high resolution X-ray spectra of cosmic sources are broadening our understanding of the physical conditions, such as temperature, density, Ionization state, and elemental abundances. X-ray emitting astrophysical plasmas can be generally classified by their dominant ionization mechanism, either collisional ionization or X-ray photoionization. The atomic data needs are significantly different for these two cases; however, for both cases it is important that we identify robust and accurate diagnostics and that we verify completeness of the broadband models. We discuss the status of tile atomic data currently used in atomic databases for X-ray astronomy, in view of theoretical and experimental atomic physics considerations. We will also discuss the application of these models to new astrophysical data.
Document ID
20010071070
Acquisition Source
Marshall Space Flight Center
Document Type
Preprint (Draft being sent to journal)
Authors
Brickhouse, Nancy
(Smithsonian Astrophysical Observatory Cambridge, MA United States)
Date Acquired
August 20, 2013
Publication Date
January 19, 2000
Subject Category
Astronomy
Funding Number(s)
CONTRACT_GRANT: NAS8-39073
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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