J/A+A/437/345ivo://CDS.VizieR/J/A+A/437/345doi:10.26093/cds/vizier.34370345CDSNahar S.N.Pradhan A.K.2005-06-14T16:49:22Z2005-06-14T16:48:06ZCDS support team

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

cds-question@unistra.fratomic-physicsWe present new calculations for transition probabilities of FeIV, with much more extensive datasets than heretofore available, for a variety of astrophysical applications. The large-scale close coupling R-matrix calculations yield 1798 LS bound states with n<=11 and l<=9, and corresponding 138121 dipole allowed transitions in the form of oscillator strengths f, line strengths S, and A-coefficients. This represents the largest R-matrix dataset in LS coupling for any ion under either the Opacity Project or the Iron Project. Through algebraic transformation of the LS multiplets, a total of 712120 dipole allowed fine structure transitions for FeIV are obtained. Observed transition energies, whenever available, are used together with the energy independent line strengths to derive the f- and the A-values for improved accuracy; the adopted algorithm used calculated energies for the remainder. Present results show significantly better accuracy for the important low-lying states than previous calculations. Monochromatic and mean opacities for FeIV are computed and compared with those obtained using the Opacity Project data. We find differences which could have important consequences for several astrophysical applications involving low ionization stages of iron.2005A&A...437..345Nhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/437/345CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/A+AS/103/273 : IRON Project II IR collision strengths of C-like ionsJ/A+A/283/319 : IRON Project III B-like ionsJ/A+AS/108/1 : IRON Project V Collision strengths of O-like ionsJ/A+A/293/953 : IRON Project VI Fe II collision strengthsJ/A+A/293/967 : IRON Project VII Fe II radiative transitionsJ/A+AS/109/193 : IRON Project VIII Electron excitation of Ti-like ionsJ/A+AS/119/509 : IRON Project XVII Radiative transition in Fe IIIJ/A+AS/119/523 : IRON Project XVIII Electron impact for Fe IIIJ/A+AS/120/361 : IRON Project XIX Fe II radiative transitionsJ/A+AS/123/159 : IRON Project XXII C and O radiative ratesJ/A+AS/123/575 : IRON Project XXIII Fe XXII excitation rate coefficientsJ/A+AS/126/373 : IRON Project XXVII Fe IV collision strengthsJ/A+AS/131/499 : IRON Project XXIX Boron isoelectronic sequenceJ/A+AS/131/153 : IRON Project XXXI Fe XII electron excitationJ/A+AS/135/347 : IRON Project XXXV Fe XXIV & Fe XXV oscillator strengthsJ/A+AS/136/395 : IRON Project XXXVII Fe VI collision strengthsJ/A+AS/137/165 : IRON Project XXXVIII Fe XV fine-structure transitionsJ/A+AS/143/483 : IRON Project XLII Fe XXI electron impact excitationJ/A+AS/144/141 : IRON Project XLIII Fe V transition probabilitiesJ/A+AS/147/111 : IRON Project XLIV Fe VI trans. prob. & line ratioJ/A+AS/147/253 : IRON Project XLV Ar XIII, Fe XXI trans. probabilitiesJ/A+A/365/268 : IRON Project XLVII Ni III electron impact excitationJ/A+A/372/1078 : IRON Project XLIX Fe XX electron impact excitationJ/A+A/372/1083 : IRON Project L Fe XIX electron impact excitationJ/A+A/394/753 : IRON Project LI Fe IX electron impact excitationJ/A+A/408/789 : IRON Project LIII Fe XVII transition probabilitiesJ/A+A/413/779 : IRON Project LIV Fe XX transition probabilitiesJ/A+A/420/763 : IRON Project LV Ni II electron impact excitationJ/A+A/448/779 : IRON Project LXI Fe IV radiative transitionsJ/A+A/457/721 : IRON Project LXII Fe XVIII allowed and forbidden trans.J/A+A/466/763 : IRON Project LXIII Fe^19+^ electron impact excitationhttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/437/345https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/437/345http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/437/345https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/437/345https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/437/345http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/437/345GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapdefaultJ/A+A/437/345/table3*Fe IV energy levelsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintConfigConfigurationcharSLpiSLpi termcharECalculated absolute energyRydoubleJ/A+A/437/345/table4Fe IV Oscillator strengths for LS multipletsfiff valuedoublen_S[I] I for InfinitycharEfEnergy of the f stateRydoublerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSiS parameter of the ith state of the transitional symmetry (1)intLiL parameter of the ith state of the transitional symmetry (1)intPiParity parameter of the ith state of the transitional symmetry (1)intiEnergy position of the initial state (1)intSfS parameter of the jth state of the transitional symmetry (1)intLfL parameter of the jth state of the transitional symmetry (1)intPfParity parameter of the jth state of the transitional symmetry (1)intfEnergy position of the final state (1)intEiEnergy of the i stateRydoubleS? Line strength (no value when S=Infinity)doublenullableAfiA-values**-1double