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\documentclass[11pt]{article}

\usepackage{hrms}  %% Page settings, style ... for the HRMS abstract book.

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\title{HIGH ROVIBRATIONAL STATES OF HC$_{3}$N: ANALYSIS OF THE RESONANCE NETWORK INVOLVING THE
       STRONG $2\nu_5$ OVERTONE BAND}

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\author{\underline{\FirstName L. \LastName BIZZOCCHI},
        \FirstName M. \LastName MELOSSO,
        \FirstName C. \LastName PUZZARINI}
\address{Dipartimento di Chimica ``Giacomo Ciamician'', via F. Selmi 2, 40126 Bologna (Italy)}
\author{\FirstName F. \LastName TAMASSIA}
\address{Dipartimento di Chimica Industriale ``Toso Montanari'', viale del Risorgimento 4, 40136 Bologna (Italy)}
\author{\FirstName O. \LastName PIRALI,
        \FirstName M.-A. \LastName MARTIN DRUMEL}
\address{Universit\'e Paris-Saclay, CNRS, Institut des Sciences Mol\'eculaires d'Orsay, 91405 Orsay (France)}


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\fancyhead[C]{{\footnotesize \textit{HRMS, 28th Colloquium, Dijon, France,
  Aug. 28 - Sept. 1, 2023}}}
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\category {3,4}
\begin{document}

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%% Place the body of your abstract below.
Cyanoacetylene (HC$_{3}$N) is a major astrophysical tracer which manifests its presence in Space
via strong rotational and infrared emissions.
One of the most conspicuous features of its infrared (IR) spectrum is the $2\nu_5$ overtone bands located
at $\sim$1300\,cm$^{-1}$ (7.7\,$\mu$m), and falling near the edge of mid infrared atmospheric window.
Despite extensive past investigation of the HC$_{3}$N rovibrational spectrum \cite{Bizzocchi2017,Tamassia-2021},
this band still lacks an accurate analysis which takes into account the complex resonance
network involving the $v_5 = 2$, bending state.
Here, we report on a comprehensive study of the third polyad of interacting lelvels which includes the
states: $(v_4 = 1, v_7 = 2)$, $v_6 = v_7 = 2$, $(v_5 = 1, v_7 = 3)$, $v_7 = 6$, and $v_5 = 2$, located
around 1300\,cm$^{-1}$\@.
The analysis is performed on an extensive dataset collected at SOLEIL (FAR/mid-IR) and at the University
of Bologna (mid-IR and rotational data).
Our objective is to retrieve a set of spectroscopic constants which have both clear physical meaning and
excellent spectral predictive capability.
To this aim, we adopt the ro-vibrational Hamiltonian already used for the analysis of the first and second
resonance systems of HC$_3$N (e.g.~\cite{Tamassia-2021}). It includes explicitly vibrational and ro-vibrational
$l$-type resonance effects in bending overtones/combinations as well as the numerous anharmonic resonances
occurring between accidentally nearly-degenerate states.
The results will serve to improve the data already included in the 2020 release of the HITRAN database.


\begin{thebibliography}{10}

\bibitem{Bizzocchi2017}
  L.~Bizzocchi, F.~{Tamassia}, M.~{Melosso}, {\it et al.},
  {\it Astrophys. J. Suppl. S.} {\bf 233}, {\it 11} (2017).

\bibitem{Tamassia-2021}
  F.~{Tamassia}, L.~Bizzocchi M.~{Melosso}, {\it et al.},
  J. Quant. Spectrosc. Rad. Trans. {\bf 279,} {\it 108044} (2021).

\end{thebibliography}

\end{document}
