2021A&A...652A.163C

Query : 2021A&A...652A.163C

2021A&A...652A.163C - Astronomy and Astrophysics, volume 652A163-163 (2021/8-1)

Hunting the relatives of benzonitrile: Rotational spectroscopy of dicyanobenzenes.

CHITARRA O., LEE K.L.K., BUCHANAN Z., MELOSSO M., McGUIRE B.A., GOUBET M., PIRALI O. and MARTIN-DRUMEL M.-A.

Abstract (from CDS):


Context. The recent interstellar detections of -CN containing aromatic species, namely benzonitrile, 1-cyanonaphthalene, and 2-cyanonaphthalene, 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. 10-300K) for astronomical searches. Our searches in TMC-1 for both ortho- and meta-isomers provide upper limits for the abundances of the species.

Abstract Copyright: © O. Chitarra et al. 2021

Journal keyword(s): methods: laboratory: molecular - techniques: spectroscopic - astrochemistry - ISM: abundances - submillimeter: general

VizieR on-line data: <Available at CDS (J/A+A/652/A163): 1[23]-DCB_hfs.lin 1[23]-DCB_hfs.par 1[23]-DCB_hfs.int 1[23]-DCB_hfs.fit 1[23]-DCB_hfs.qpart>

Simbad objects: 1

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Number of rows : 1
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 TMC-1 MoC 04 41 45.9 +25 41 27           ~ 1872 0

Query : 2021A&A...652A.163C

Basic data :
TMC-1 -- Molecular Cloud
Other object types: otypes_help 		PoC (MLB,[MOH94]), MoC (TMC), Cld (HCL)
ICRS coord. (ep=J2000) : 		04 41 45.9 +25 41 27 [ ] D 1983ApJ...264..517M
FK4 coord. (ep=B1950 eq=1950) : 		04 38 42.0 +25 35 45 [ ]
Gal coord. (ep=J2000) : 		174.3852 -13.4312 [ ]
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Hierarchy : number of linked objects
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HCL 2 MLB 3-28 TMC-1 [MOH94] 6

References (1872 between 1850 and 2026) (Total 1872)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).
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