Title :

Hunting the relatives of benzonitrile: Rotational spectroscopy of dicyanobenzenes

Author(s) :

Chitarra, Olivia [Auteur]
Institut des Sciences Moléculaires d'Orsay [ISMO]
Lee, Kin Long Kelvin [Auteur]
Massachusetts Institute of Technology [MIT]
Buchanan, Zachary [Auteur]
University of California [Davis] [UC Davis]
Melosso, Mattia [Auteur]
Alma Mater Studiorum Università di Bologna = University of Bologna [UNIBO]
Mcguire, Brett [Auteur]
Massachusetts Institute of Technology [MIT]
Goubet, Manuel [Auteur]
Laboratoire de Physique des Lasers, Atomes et Molécules - UMR 8523 [PhLAM]
Physique Moléculaire aux Interfaces [PMI]
Pirali, Olivier [Auteur]
Institut des Sciences Moléculaires d'Orsay [ISMO]
Martin-Drumel, Marie-Aline [Auteur]
Institut des Sciences Moléculaires d'Orsay [ISMO]

Journal title :

Astronomy and Astrophysics - A&A

Pages :

A163

Publisher :

EDP Sciences

Publication date :

2021-07-06

ISSN :

0004-6361

English keyword(s) :

Methods
laboratory
molecular -techniques
spectroscopic -Astrochemistry -ISM
abundances -Submillimeter
general

HAL domain(s) :

Physique [physics]/Astrophysique [astro-ph]/Astrophysique galactique [astro-ph.GA]
Physique [physics]/Physique [physics]/Chimie-Physique [physics.chem-ph]

English abstract : [en]

Context. The recent interstellar detections of-CN containing aromatic species, namely benzonitrile, 1-cyanonaphthalene, and 2cyanonaphthalene, bring renewed interest in related molecules that could participate in similar ...
Show more >Context. The recent interstellar detections of-CN containing aromatic species, namely benzonitrile, 1-cyanonaphthalene, and 2cyanonaphthalene, bring renewed interest in related molecules that could participate in similar reaction networks. Aims. To enable new interstellar searches for benzonitrile derivatives, the pure rotational spectra of several related species need to be investigated in the laboratory. Methods. We have recorded the pure rotational spectra of ortho-and meta-dicyanobenzene in the centimetre and millimetre-wave domains. Assignments were supported by high-level quantum chemical calculations. Using Markov chain Monte Carlo simulations, we also searched for evidence of these molecules towards TMC-1 using the GOTHAM survey. Results. Accurate spectroscopic parameters are derived from the analysis of the experimental spectra, allowing for reliable predictions at temperatures of interest (i.e. 10-300 K) for astronomical searches. Our searches in TMC-1 for both ortho-and meta-isomers provide upper limits for the abundances of the species.Show less >

Language :

Anglais

Popular science :

Non

ANR Project :

Etude en laboratoire d'espèces réactives par taxonomie spectrale

Collections :

• Laboratoire de Physique des Lasers, Atomes et Molécules (PhLAM) - UMR 8523

Source :

Harvested from HAL