A H13CN/HN13C linelist, model atmospheres and synthetic spectra for carbon stars
G. J. Harris (UCL), F. C. Larner (UCL), J. Tennyson (UCL), B. M., Kaminsky (MAO), Ya. V. Pavlenko (MAO), and H. R. A. Jones (CAR Uh)
TL;DR
This paper presents a detailed line list for 13C substituted HCN, models atmospheres, and generates synthetic spectra to analyze carbon stars, aiding in the measurement of isotopic ratios.
Contribution
The work provides a comprehensive line list and synthetic spectra for 13C HCN, enhancing the analysis of carbon star atmospheres and isotopic compositions.
Findings
Synthetic spectra match observed spectra of WZ Cas.
High-resolution spectra near 14 micron are sensitive to 13C/12C ratios.
The line list improves isotopic ratio measurements in carbon stars.
Abstract
A line list of vibration-rotation transitions for 13C substituted HCN is presented. The line list is constructed using known experimental levels where available, calculated levels and ab initio line intensities originally calculated for the major isotopologue. Synthetic spectra are generated and compared with observations for cool carbon star WZ Cas. It is suggested that high resolution HCN spectra recorded near 14 micron should be particularly sensitive to the 13C to 12C ratio.
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