J/A+A/565/A77ivo://CDS.VizieR/J/A+A/565/A77doi:10.26093/cds/vizier.35650077CDSDel Zanna G.Storey P.J.Badnell N.R.Mason H.E.2014-11-09T17:30:11Z2014-05-14T09:46:46ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.fratomic-physicsWe present the results of a new large-scale intermediate-coupling frame transformation R-matrix scattering calculation for electron collisional excitation of Fe IX. The target includes all the main configurations up to n=5, to improve our earlier R-matrix and distorted-wave (DW) calculations for the n=3,4 levels. Unlike similar calculations which we carried out for the other coronal iron ions, in this case the larger target does not significantly affect the collision strengths of the strongest transitions to the n=3,4 levels. Some differences are however present for a few transitions, in particular for the 3d-4p line at 197.86{AA}. For the weaker transitions, significant enhancements due to extra resonances resulting from this much bigger target are found. Several new line identifications are suggested. We find excellent agreement between predicted and observed line intensities in the EUV (Hinode EIS) showing that Fe IX lines provide a reliable temperature diagnostic. We also show that the visible forbidden lines are a good diagnostic to measure electron densities.2014A&A...565A..77Dhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/565/A77CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/A+A/541/A90 : Fe X soft X-ray lines (Del Zanna+, 2012)J/A+A/543/A139 : Fe XII soft X-ray lines (Del Zanna+, 2012)J/A+A/543/A144 : Fe XIII soft X-ray lines (Del Zanna+, 2012)J/A+A/549/A42 : Fe XI soft X-ray lines (Del Zanna+, 2013)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/565/A77https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/565/A77http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/565/A77https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/565/A77https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/565/A77http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/565/A77GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapdefaultJ/A+A/565/A77/table1Level energies of the RM4 calculationL[0-7] L valuephys.atmol.qnintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIndex[1/865] Level indexmeta.idintLevelElectronic level descriptionmeta.note;phys.atmol.levelchar2S+1[1/7] 2S+1 multiplicityphys.atmol.qnintJ[0/8] J valuephys.atmol.qnfloatETarget energy (ab initio)cm**-1phys.energy;phys.atmol.leveldoubleJ/A+A/565/A77/table2Transition probabilities and thermally averaged collision strengths for the RM4 calculationrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordinti[2/865] Upper level index of the transitionmeta.idintj[1/864] Lower level index of the transitionmeta.idintAEinstein A coefficients**-1phys.atmol.transProbdoubleCS1Averaged collision strength at T=1.62x10^4^Kphys.atmol.collStrengthdoubleCS2Averaged collision strength at T=4.05x10^4^Kphys.atmol.collStrengthdoubleCS3Averaged collision strength at T=8.1x10^4^Kphys.atmol.collStrengthdoubleCS4Averaged collision strength at T=1.62x10^5^Kphys.atmol.collStrengthdoubleCS5Averaged collision strength at T=4.05x10^5^Kphys.atmol.collStrengthdoubleCS6Averaged collision strength at T=8.1x10^5^Kphys.atmol.collStrengthdoubleCS7Averaged collision strength at T=1.62x10^6^Kphys.atmol.collStrengthdoubleCS8Averaged collision strength at T=4.05x10^6^Kphys.atmol.collStrengthdoubleCS9Averaged collision strength at T=8.1x10^6^Kphys.atmol.collStrengthdoubleCS10Averaged collision strength at T=1.62x10^7^Kphys.atmol.collStrengthdoubleElimHigh-energy limitphys.energy;phys.atmol.leveldouble