Accurate Wavenumbers for Mid-Infrared Fine-Structure Lines
Open Access
- 1 December 1995
- journal article
- research article
- Published by American Astronomical Society in The Astrophysical Journal
- Vol. 454 (2) , L161
- https://doi.org/10.1086/309795
Abstract
We present accurate new wavenumbers for a set of 13 mid-infrared fine-structure lines. The wavenumbers were determined from observations of the planetary nebula NGC 7027 and of the red supergiant α Scorpii. Most of the new wavenumbers are good to within 0.0025%, or 8 km s-1. We provide details on the measurements and present an analysis of the errors. In addition, we present the first observations of hyperfine splitting in the [Na IV] 1106 cm-1 line.Keywords
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