Revised Analysis of Fe vii

Alexander Kramida*, Alexander N. Ryabtsev, Peter R. Young

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


New spectrograms of multiply ionized iron have been recorded and analyzed, targeting the Fe vii spectrum. As a result, several previously unknown spectral lines and energy levels have been identified in this spectrum. These new data have been analyzed together with all previously published laboratory and astrophysical data on this spectrum. The energy levels have been interpreted using parametric calculations with Cowan codes. Radiative transition rates calculated in this work supplemented other previously published calculations in constructing a complete set of recommended transition probabilities. The ionization energy of Fe vii has been redetermined with a fivefold improvement in accuracy. Its new value is 1,007,928(20) cm−1, corresponding to 124.9671(25) eV.
Original languageEnglish
Article number37
Pages (from-to)1-20
Number of pages20
JournalAstrophysical Journal, Supplement Series
Issue number2
Early online date1 Feb 2022
Publication statusPublished - 3 Feb 2022
Externally publishedYes


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