Decoding millimetre-wave spectra of 2-iminopropanenitrile, a candidate for astronomical observations

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22340%2F22%3A43923986" target="_blank" >RIV/60461373:22340/22:43923986 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.aanda.org/articles/aa/full_html/2022/09/aa43696-22/aa43696-22.html" target="_blank" >https://www.aanda.org/articles/aa/full_html/2022/09/aa43696-22/aa43696-22.html</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1051/0004-6361/202243696" target="_blank" >10.1051/0004-6361/202243696</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Decoding millimetre-wave spectra of 2-iminopropanenitrile, a candidate for astronomical observations

Popis výsledku v původním jazyce

Aims. The recent detection of cyanomethanimine in the interstellar medium makes its methyl derivative, 2-iminopropanenitrile (CH3C(CN)NH), a promising candidate for an interstellar detection. The aim of this work is to extend the current knowledge of the laboratory rotational spectrum to higher frequencies, which is an essential prerequisite for an identification of the molecular species in the interstellar medium by millimetre-wave astronomy.Methods. The room-temperature rotational spectrum of 2-iminopropanenitrile has been measured in several frequency regions between 128 and 329 GHz. The A–E splittings of the rotational transitions arising from the methyl top internal rotation were analysed employing the ERHAM and XIAM programs.Results. A dataset of approximately 900 newly assigned rotational transitions in the ground state of the Z isomer and a set of refined molecular constants, including the internal rotation parameters, are reported. Moreover, this work provides the first spectral characterisation of the less stable E isomer ground state, as well as the three lowest-lying vibrationally excited states of the Z isomer, v21 = 1, v14 = 1, and v20 = 1. This comprehensive spectroscopic study will allow a search for 2-iminopropanenitrile in the millimetre-wave surveys of interstellar sources, such as those recorded by the Atacama Large Millimeter/submillimeter Array.

Název v anglickém jazyce

Decoding millimetre-wave spectra of 2-iminopropanenitrile, a candidate for astronomical observations

Popis výsledku anglicky

Aims. The recent detection of cyanomethanimine in the interstellar medium makes its methyl derivative, 2-iminopropanenitrile (CH3C(CN)NH), a promising candidate for an interstellar detection. The aim of this work is to extend the current knowledge of the laboratory rotational spectrum to higher frequencies, which is an essential prerequisite for an identification of the molecular species in the interstellar medium by millimetre-wave astronomy.Methods. The room-temperature rotational spectrum of 2-iminopropanenitrile has been measured in several frequency regions between 128 and 329 GHz. The A–E splittings of the rotational transitions arising from the methyl top internal rotation were analysed employing the ERHAM and XIAM programs.Results. A dataset of approximately 900 newly assigned rotational transitions in the ground state of the Z isomer and a set of refined molecular constants, including the internal rotation parameters, are reported. Moreover, this work provides the first spectral characterisation of the less stable E isomer ground state, as well as the three lowest-lying vibrationally excited states of the Z isomer, v21 = 1, v14 = 1, and v20 = 1. This comprehensive spectroscopic study will allow a search for 2-iminopropanenitrile in the millimetre-wave surveys of interstellar sources, such as those recorded by the Atacama Large Millimeter/submillimeter Array.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10403 - Physical chemistry

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2022

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

ASTRONOMY &amp; ASTROPHYSICS

ISSN

0004-6361

e-ISSN

1432-0746

Svazek periodika

665

Číslo periodika v rámci svazku

September 2022

Stát vydavatele periodika

FR - Francouzská republika

Počet stran výsledku

10

Strana od-do

"A9"

Kód UT WoS článku

000849046800006

EID výsledku v databázi Scopus

2-s2.0-85138301521