Table · dataset · 2008
Atomic Data from the Iron Project LXVI. Fe^18+^
Listed in IVOA Registry (Virtual Observatory)
Accurate electron collisional data are required for the analysis of the Fe XIX astrophysical spectrum, in particular in the Sun.
Description
Such an analysis can provide information on the physical characteristics of the coronal plasma. An extensive target is used in an R-matrix scattering calculation to provide the necessary data for Fe^18+^.
The use of the R-matrix method includes the resonance contribution lacking in the distorted wave approach and the large target improves the accuracy of the close-coupling approximation. The R-Matrix package described by Berrington et al. (1995) as provided by the UK RmaX project has been used to calculate electron collisional data among 342 levels of Fe^18+^. We have used the intermediate-coupling frame-transformation (ICFT) method (Griffin et al., 1998) to transform data obtained in a 166 term LS-coupling calculation.
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Contributions from the mass and Darwin interactions have also been included in the Hamiltonian. Collision strengths for all transitions between the 342 levels of Fe^18+^ are presented. They are tabulated over a wide range of electron temperatures of astrophysical interest.
The results are compared with the earlier Iron Project work of Butler & Zeippen (2001, Cat. <J/A+A/372/1078>) and also with that of McLaughlin et al. (2001MNRAS.328..442M) and Landi & Gu (2006ApJ...640.1171L). The agreement is reasonable for the low-lying transitions. Larger differences are found for the more highly excited states.
The file structure is described in detail in adas.ac.uk/man/appxa-04.pdf A sample program to extract a single upsilon is provided.
Links
Where it is published
- Reference page cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/489/1369 ↗
landing page · from IVOA Registry
Documentation and papers
- ADS 2008A&A...489.1369B ui.adsabs.harvard.edu/abs/2008A%26A...489.1369B ↗
publication · from IVOA Registry
Catalogue records · 2
- VOResource record dc.g-vo.org/oai.xml?verb=GetRecord&metadataPrefix=ivo_vor&identifier=ivo%3… ↗
metadata API · from IVOA Registry
- Registry record (GAVO) dc.g-vo.org/I/cds.vizier/j/a%2Ba/489/1369 ↗
catalogue entry · from IVOA Registry
Topics
- From keywords
- Astronomy & Astrophysics
- Inferred from text
- Astronomical sciences 69%
Provenance · 1 source records, 8 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| IVOA Registry (Virtual Observatory) | ivo://cds.vizier/j/a+a/489/1369 | 12 d ago | JSON v1 |
| Field | Assertion | Extractor | Evidence |
|---|---|---|---|
| access_level | source · IVOA Registry | connector:ivoa_registry@1.0.0 | |
| concepts[field].anzsrc:group:5101 | enrichment · IVOA Registry | taxonomy-embedding@1.1.0 | title+keywords+description (69%) |
| concepts[field].local:field:astronomy | mapping · IVOA Registry | connector:ivoa_registry@1.0.0 | |
| description | source · IVOA Registry | connector:ivoa_registry@1.0.0 | rr.resource.res_description |
| license_text | source · IVOA Registry | connector:ivoa_registry@1.0.0 | |
| publication_date | source · IVOA Registry | connector:ivoa_registry@1.0.0 | |
| title | source · IVOA Registry | connector:ivoa_registry@1.0.0 | rr.resource.res_title |
| updated_date | source · IVOA Registry | connector:ivoa_registry@1.0.0 |