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Extinction Correction and the [Fe ii] 1.26 μm/1.64 μm Intensity Ratio
Author(s) -
Adam E. Rubinstein
Publication year - 2021
Publication title -
research notes of the aas
Language(s) - English
Resource type - Journals
ISSN - 2515-5172
DOI - 10.3847/2515-5172/ac283f
Subject(s) - extinction (optical mineralogy) , intensity (physics) , environmental science , physics , optics , astrophysics
From imaging observations of [Fe  ii ] emission in Herbig–Haro objects, I find a lower limit to the zero-extinction [Fe  ii ] 1.26  μ m/1.64  μ m intensity ratio of 2.6 and argue that this lower limit must be close to the true zero-extinction intensity ratio. My extinction determinations using this zero-extinction value yields results on well-studied HH objects consistent with results from other ionic-line spectra, whereas using nearly all theoretical values of [Fe  ii ] 1.26  μ m/1.64  μ m in the literature gives rise to unphysical results.

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