High-resolution Infrared Spectrum Of The Diatomic Vanadium Oxide

Döring, Eileen

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https://hdl.handle.net/2142/116971 Copy

Description

Title

High-resolution Infrared Spectrum Of The Diatomic Vanadium Oxide

Author(s)

Döring, Eileen

Contributor(s)

• Fuchs, Guido W.
• Giesen, Thomas
• Breier, Alexander A.
• Blum, Luisa

Issue Date

2022-06-24

Keyword(s)

Astronomy

Abstract

Small molecules made of refractory materials are thought to play an important role in the dust formation processes around late-type stars. Likewise, they take part in the opacity process of variable late-type stars, as has been shown for the molecule TiO.\footnote{M.J. Reid \& J.E. Goldston, The Astrophysical Journal \textbf{568}, 931 (2002)} Because of similar formation conditions, the diatomic molecule vanadium oxide (VO) is thought to occur in similar locations around stars as TiO.\footnote{L.K. McKemmish \textit{et al.}, Monthly Notices of the Royal Astronomical Society \textbf{463}, 771 (2016)} VO has already been detected in the near-infrared region in the envelope of the red hypergiant VY CMa\footnote{J. Bernal \textit{et al.}, 74th International Symposium on Molecular Spectroscopy (2019)}, but due to the lack of high-resolution laboratory spectra, no astrophysical search of VO in the mid-IR region has been performed. In this work, we report the ro-vibrational absorption spectrum of \(X^4\Sigma^-\) VO, including its hyperfine structure. In our experiment we used a frequency modulated quantum cascade laser in combination with Herriott-type multipass optics. The molecules were produced by laser ablation of a vanadium rod and an N\(_2\)O/He buffer gas, which was subsequently adiabatically expanded into a vacuum chamber. The rotationally cooled spectrum was analyzed using the pgopher software and the molecular constants were determined. The experimental data as well as line predictions will enable a dedicated search for this molecule in space at mid-IR wavelengths.

Publisher

International Symposium on Molecular Spectroscopy

Type of Resource

text

Language

eng

Handle URL

https://hdl.handle.net/2142/116971

DOI

https://doi.org/10.15278/isms.2022.FG11

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Copyright 2022 held by the authors

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