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Collisional Plasma Models with APEC/APED: Emission-Line Diagnostics of Hydrogen-like and Helium-like Ions
Open accessAbstract
New X-ray observatories ( Chandra and XMM-Newton ) are providing a wealth of high-resolution X-ray spectra in which hydrogen- and helium-like ions are usually strong features. We present results from a new collisional-radiative plasma code, the Astrophysical Plasma Emission Code (APEC), which uses atomic data in the companion Astrophysical Plasma Emission Database (APED) to calculate spectral models for hot plasmas. APED contains the requisite atomic data such as collisional and radiative rates, recombination cross sections, dielectronic recombination rates, and satellite line wavelengths. We compare the APEC results to other plasma codes for hydrogen- and helium-like diagnostics and test the sensitivity of our results to the number of levels included in the models. We find that dielectronic recombination with hydrogen-like ions into high ( n = 6-10) principal quantum numbers affects some helium-like line ratios from low-lying ( n = 2) transitions.
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Self-citationMazzotta, P., Mazzitelli, G., Colafrancesco, S., & Vittorio, N. (1998) · Astronomy & Astrophysics Supplement Series · doi:10.1051/aas:1998330 · Cited by 957
New calculations of Fe L-shell X-ray spectra in high-temperature plasmas
Liedahl, D. A., Osterheld, A. L., & Goldstein, W. H. (1995) · The Astrophysical Journal · doi:10.1086/187729 · Cited by 822
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Merten, J., Coe, D., Dupke, R., Massey, R., Zitrin, A., Cypriano, E. S., Okabe, N., Frye, B., Braglia, F. G., Jiménez-Teja, Y., et al. (2011) · Monthly Notices of the Royal Astronomical Society · doi:10.1111/j.1365-2966.2011.19266.x · Cited by 270
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Metadata
- Authors
- Smith, R. K., Brickhouse, N. S., Liedahl, D. A., & Raymond, J. C.
- Venue
- The Astrophysical Journal
- Publisher
- American Astronomical Society
- Published
- 2001-08-01
- Volume
- 556
- Issue
- 2
- Pages
- L91-L95
- ISSN
- 0004-637X (ISSN-L)
- OpenAlex
- W1976671173
- Cited by
- 2,085
- References
- 4
- FWCI
- 23.10
- Type
- journal article
- Language
- en
- Open access
- bronze
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
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