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Ion storage ring measurements of low temperature dielectronic recombination rate coefficients for modeling x-ray photoionized cosmic plasmas
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Savin, D. W. Schwalm, D. Gwinner, G. Wolf, A. Mueller, A. Schippers, S. |
| Copyright Year | 2002 |
| Description | Low temperature dielectronic recombination (DR) is the dominant recombination mechanism for most ions in X-ray photoionized cosmic plasmas. Reliably modeling and interpreting spectra from these plasmas requires accurate low temperature DR rate Coefficients. Of particular importance are the DR rate coefficients for the iron L-shell ions (Fe XVII-Fe XXIV). These ions are predicted to play an important role in determining the thermal structure and line emission of X-ray photoionized plasmas, which form in the media surrounding accretion powered sources such as X-ray binaries (XRBs), active galactic nuclei (AGN), and cataclysmic variables (Savin et al., 2000). The need for reliable DR data of iron L-shell ions has become particularly urgent after the launches of Chandra and XMM-Newton. These satellites are now providing high-resolution X-ray spectra from a wide range of X-ray photoionized sources. Interpreting the spectra from these sources requires reliable DR rate coefficients. However, at the temperatures relevant, for X-ray photoionized plasmas, existing theoretical DR rate coefficients can differ from one another by factors of two to orders of magnitudes. |
| File Size | 93680 |
| Page Count | 2 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20030058910 |
| Archival Resource Key | ark:/13960/t0ht7km0g |
| Language | English |
| Publisher Date | 2002-11-01 |
| Access Restriction | Open |
| Subject Keyword | Astrophysics Temperature Distribution Recombination Coefficient Plasmas Physics Storage Rings Particle Accelerators Active Galactic Nuclei Cataclysmic Variables Photoionization X Ray Binaries X Ray Spectra Cosmic Plasma Electron-ion Recombination X Ray Sources Metal Ions Low Temperature Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
