A High-resolution Spectroscopic Analysis of Aminoacrylonitrile and an Interstellar Search toward G+0.693

Cyanides, ranging from three carbon atoms to polycyclic aromatic hydrocarbons, and alkenyl compounds are abundant in the interstellar medium. Aminoacrylonitrile (3-Amino-2-propenenitrile, H 2 N–CH=CH–C≡N), an alkenyl cyanide, thus represents a promising candidate for new interstellar detection. A co...

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Bibliographic Details
Published in:The Astrophysical journal 2023-07, Vol.951 (2), p.108
Main Authors: Alberton, D., Lattanzi, V., Endres, C., Rivilla, V. M., Guillemin, J. C., Caselli, P., Jiménez-Serra, I., Martín-Pintado, J.
Format: Article
Language:English
Subjects:
Astrophysics
Chemical Sciences
Complex organic molecules
Cyanides
Data collection
Interstellar abundances
Interstellar matter
Interstellar medium
Interstellar molecules
Laboratory astrophysics
Molecular clouds
Molecular spectroscopy
Polycyclic aromatic hydrocarbons
Pre-biotic astrochemistry
Rotational spectra
Rotational states
Searching
Spectral line identification
Spectroscopic analysis
Vibrational states
Wavelengths
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Summary:Cyanides, ranging from three carbon atoms to polycyclic aromatic hydrocarbons, and alkenyl compounds are abundant in the interstellar medium. Aminoacrylonitrile (3-Amino-2-propenenitrile, H 2 N–CH=CH–C≡N), an alkenyl cyanide, thus represents a promising candidate for new interstellar detection. A comprehensive spectroscopic laboratory investigation of aminoacrylonitrile in its rotational ground vibrational state has been herein performed. The measurements carried out up to the THz regime made it possible to generate a precise set of reliable rest frequencies for its search in space up to submillimeter wavelengths. The Z -aminoacrylonitrile ( Z -apn) isomer spectrum has been recorded employing a source-modulated submillimeter spectrometer, from 80 GHz to 1 THz. A combination of Doppler and sub-Doppler measurement regimes allowed one to record 600 new lines. The collected data have enabled the characterization of a set of spectroscopic parameters up to decic centrifugal distortion constants. The catalog generated from the improved spectral data has been used for the search of Z -apn in the spectral survey of the G+0.693-0.027 molecular cloud located in the central molecular zone, in the proximity of the Galactic center.
ISSN:0004-637X
1538-4357
DOI:10.3847/1538-4357/acd8bd