Potential lines of formic acid for its detection in cosmic objects

Being precursor for amino acids (constituents of life), the simplest carboxylic acid, formic acid (HCOOH) has great importance in astrobiology. It has two rotameric isomers: trans-HCOOH and cis-HCOOH, each of which, due to the delocalization of π\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\pi$$\end{document}-electrons over the heavy atom chain, lies in a plane. The electric dipole moment of each isomer has a and b components and energy levels for both components are common. It is, therefore, more scientific to consider both components of electric dipole moment together. The stronger isomer trans-HCOOH has been detected in several cosmic objects through its 16 a-type transitions, because its μb\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\mu _b$$\end{document} is very small as compared to μa\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\mu _a$$\end{document}. The cis-HCOOH has been detected in Orion Bar through 12a and b types of transitions.