J/A+A/370/1071ivo://CDS.VizieR/J/A+A/370/1071doi:10.26093/cds/vizier.33701071CDSBinello A.M.Landi E.Mason H.E.Storey P.J.Brosius J.W.2001-04-30T10:15:15Z2001-04-30T10:13:55ZCDS support team

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

cds-question@unistra.fratomic-physicsspectroscopyultraviolet-astronomythe-sunA new set of radiative and electron collisional data for Fe XII was presented in two earlier papers. In the present work, we derive level populations and theoretical line intensities for a range of plasma densities and temperatures. Observations of Fe XII lines obtained with the Solar EUV Rocket Telescope and Spectrograph are analysed both as a check on the quality of the new atomic data and to determine the electron density in active regions and the quiet Sun. The discrepancy between the electron density values determined from Fe XII line intensity ratios and those obtained from other ions is investigated.2001A&A...370.1071Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/370/1071CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/A+AS/125/149 : CHIANTI -http://wwwsolar.nrl.navy.mil/chianti.html : CHIANTI homepagehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/370/1071https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/370/1071http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/370/1071https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/370/1071https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/370/1071http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/370/1071GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapUVdefaultJ/A+A/370/1071/table2Spontaneous transition probabilities for all electric dipole fine structure transitions between the ground 3s^2^ 3p^3^ and the first exited 3s 3p^4^ configurations in Fe XII.recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTransTransitionmeta.id;phys.atmol.transitionn_Trans[a] a: see textmeta.notecharlambdaWavelength (1)0.1nmem.wlfloatn_lambda[*] *: Wavelengths calculated from theoretical energy levels (1)meta.notecharAA coefficients**-1phys.atmol.transProbdoubleJ/A+A/370/1071/table3Spontaneous transition probabilities for all electric dipole fine structure transitions between the ground 3s^2^ 3p^3^ and the second excited configurations in Fe XIIrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTransTransitionmeta.id;phys.atmol.transitionn_Trans[a] a: see textmeta.notecharlambdaWavelength (1)0.1nmem.wlfloatn_lambda[*] *: Wavelengths calculated from theoretical energy levels (1)meta.notecharAA coefficients**-1phys.atmol.transProbdouble