Iron Mining Eta Carinae’s Archived Spectra and Benchmarking Atomic Data

Urech Alexander (1), Bautista M. (1), Gull T. R. (2), Hartman H. (3) and Fivet V. (1) ((1) Western Michigan University; (2) NASA Goddar Space Flight Center; (3) Lund Observatory, Sweden)

Fe II has proven to be one of the most conspicuous species in UV, visible, and IR spectra. The complexity of this atomic system still challenges current theoretical methods. Comparisons of available atomic data with different astronomical spectra is the focus of the current research. Spectra from the Orion and the Eta Carinae nebulae are being used in these studies. Orions spectrum contains over 70 emission line for [Fe II] which have been used in the systematical benchmarking of Einstein transition probabilities (A-values) for forbidden transitions of the interest species against calculations from literature and our own. The spectra from many other sources must be compared to end with accurate data, which is why examination of Eta Carinae is also taking place. The Weigelt blobs are close in ejectas thought to originate from the central star of Eta Carinae and are of particular interest in this study. IDL software is being used for measuring the forbidden [Fe II] transitions from these spectra collected with the Hubble Space Telescope/ Space Telescope Image Spectrograph.

See complete preprint –>…22143102U

Urech, Alexander; Bautista, M.; Gull, T. R.; Hartman, H.; Fivet, V.
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