Reference Data For Ammonia Spectra In The 3900-6300 Cm−1 Range

Čermák, Peter

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https://hdl.handle.net/2142/116785 Copy

Description

Title

Reference Data For Ammonia Spectra In The 3900-6300 Cm−1 Range

Author(s)

Čermák, Peter

Contributor(s)

• Rakovský, Jozef
• Votava, Ondřej
• Vander Auwera, Jean
• Béguier, Serge
• Campargue, Alain
• Cosleou, Jean
• Cacciani, Patrice

Issue Date

2022-06-23

Keyword(s)

Astronomy

Abstract

Accurate reference laboratory data represents a key element for understanding any remote observations in particular astrophysical surveys. The subject has grown in importance with the recent discovery of the capability to observe spectra of exoplanets or the ability to closely probe space objects like in the case of the Rosetta mission. This need is even timelier with the James Webb telescope being deployed for operation and the new space missions dedicated to the exoplanetary spectroscopic studies like Twinkle, and the Atmospheric Remote-sensing Infrared Exoplanet Large-survey (ARIEL) destined to be launched in 2024 and 2029, respectively. The current contribution is an overview of our work concerning the acquisition of such accurate reference data in the case of ammonia molecule based on the combination of room temperature Fourier transform spectra (both old and new), tunable laser spectroscopy in cooled Herriott cell, and in a supersonic expansion. In addition, multiple new techniques to improve the whole process of spectra analysis were used, mainly: the enhanced multi-temperature treatment for determination of empirical lower state energies, intensity-based combination differences process for determination of quantum assignments, or the accurate referenced frequency calibration to verify the absolute line positions with a sub 0.001\,cm$^{-1}$ accuracy.

Publisher

International Symposium on Molecular Spectroscopy

Type of Resource

text

Language

eng

Handle URL

https://hdl.handle.net/2142/116785

DOI

https://doi.org/10.15278/isms.2022.RN03

Copyright and License Information

Copyright 2022 held by the authors

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