Submillimeter Spectrum of Formic Acid

TL;DR

This paper reports new submillimeter spectral data for various isotopologues of formic acid, enhancing the accuracy of molecular parameters crucial for astronomical observations with advanced telescopes.

Contribution

The study provides expanded and more precise submillimeter spectral data for formic acid isotopologues, improving the molecular parameters used in astronomical spectroscopy.

Findings

New spectral data around 600 GHz and 1.1 THz for formic acid isotopologues.

Enhanced molecular parameters for better astronomical spectroscopy.

Data supports observations with Herschel, SOFIA, and ALMA.

Abstract

We have measured new submillimeter-wave data around 600 GHz and around 1.1 THz for the 13C isotopologue of formic acid and for the two deuterium isotopomers; in each case for both the trans and cis rotamer. For cis-DCOOH and cis-HCOOD in particular only data up to 50 GHz was previously available. For all species the quality and quantity of molecular parameters has been increased providing new measured frequencies and more precise and reliable frequencies in the range of existing and near-future submillimeter and far-infrared astronomical spectroscopy instruments such as Herschel, SOFIA and ALMA.