Discovery of two metallic cyanoacetylides in IRC +10216: HMgCCCN and NaCCCN

C. Cabezas; J. R. Pardo; M. Agúndez; B. Tercero; N. Marcelino; Y. Endo; P. De Vicente; M. Guélin; J. Cernicharo

doi:10.1051/0004-6361/202346462

Discovery of two metallic cyanoacetylides in IRC +10216: HMgCCCN and NaCCCN

C. Cabezas^*, J. R. Pardo, M. Agúndez, B. Tercero, N. Marcelino, Y. Endo, P. De Vicente, M. Guélin, J. Cernicharo^*

^*Corresponding author for this work

Department of Applied Chemistry

Research output: Contribution to journal › Article › peer-review

15 Scopus citations

Abstract

We report on the detection of a series of six lines in the ultra-deep Q-band integration towards IRC +10216 carried out with the Yebes 40 m telescope, which are in harmonic relation with integer quantum numbers Ju from 12 to 18. After a detailed analysis of all possible carriers, guided by high-level quantum chemical calculations, we conclude that the lines belong to HMgCCCN, named hydridomagnesium cyanoacetylide. The rotational temperature and column density derived for HMgCCCN are 17.1 ± 2.8 K and (3.0 ± 0.6) ×1012 cm-2, respectively. The observed abundance ratio between MgCCCN and HMgCCCN is approximately three. In addition, we report the discovery in space, also towards IRC +10216, of sodium cyanoacetylide, NaCCCN, for which accurate laboratory data are available. For this species we derived a rotational temperature of 13.5 ± 1.7 K and a column density of (1.2 ± 0.2) ×1011 cm-2.

Original language	English
Article number	L12
Journal	Astronomy and Astrophysics
Volume	672
DOIs	https://doi.org/10.1051/0004-6361/202346462
State	Published - 1 Apr 2023

Keywords

Astrochemistry
ISM: individual objects: IRC +10216
ISM: molecules
Line: identification
Molecular data

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title = "Discovery of two metallic cyanoacetylides in IRC +10216: HMgCCCN and NaCCCN",

abstract = "We report on the detection of a series of six lines in the ultra-deep Q-band integration towards IRC +10216 carried out with the Yebes 40 m telescope, which are in harmonic relation with integer quantum numbers Ju from 12 to 18. After a detailed analysis of all possible carriers, guided by high-level quantum chemical calculations, we conclude that the lines belong to HMgCCCN, named hydridomagnesium cyanoacetylide. The rotational temperature and column density derived for HMgCCCN are 17.1 ± 2.8 K and (3.0 ± 0.6) ×1012 cm-2, respectively. The observed abundance ratio between MgCCCN and HMgCCCN is approximately three. In addition, we report the discovery in space, also towards IRC +10216, of sodium cyanoacetylide, NaCCCN, for which accurate laboratory data are available. For this species we derived a rotational temperature of 13.5 ± 1.7 K and a column density of (1.2 ± 0.2) ×1011 cm-2.",

keywords = "Astrochemistry, ISM: individual objects: IRC +10216, ISM: molecules, Line: identification, Molecular data",

author = "C. Cabezas and Pardo, {J. R.} and M. Ag{\'u}ndez and B. Tercero and N. Marcelino and Y. Endo and {De Vicente}, P. and M. Gu{\'e}lin and J. Cernicharo",

year = "2023",

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doi = "10.1051/0004-6361/202346462",

language = "English",

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TY - JOUR

T1 - Discovery of two metallic cyanoacetylides in IRC +10216

T2 - HMgCCCN and NaCCCN

AU - Cabezas, C.

AU - Pardo, J. R.

AU - Agúndez, M.

AU - Tercero, B.

AU - Marcelino, N.

AU - Endo, Y.

AU - De Vicente, P.

AU - Guélin, M.

AU - Cernicharo, J.

PY - 2023/4/1

Y1 - 2023/4/1

N2 - We report on the detection of a series of six lines in the ultra-deep Q-band integration towards IRC +10216 carried out with the Yebes 40 m telescope, which are in harmonic relation with integer quantum numbers Ju from 12 to 18. After a detailed analysis of all possible carriers, guided by high-level quantum chemical calculations, we conclude that the lines belong to HMgCCCN, named hydridomagnesium cyanoacetylide. The rotational temperature and column density derived for HMgCCCN are 17.1 ± 2.8 K and (3.0 ± 0.6) ×1012 cm-2, respectively. The observed abundance ratio between MgCCCN and HMgCCCN is approximately three. In addition, we report the discovery in space, also towards IRC +10216, of sodium cyanoacetylide, NaCCCN, for which accurate laboratory data are available. For this species we derived a rotational temperature of 13.5 ± 1.7 K and a column density of (1.2 ± 0.2) ×1011 cm-2.

AB - We report on the detection of a series of six lines in the ultra-deep Q-band integration towards IRC +10216 carried out with the Yebes 40 m telescope, which are in harmonic relation with integer quantum numbers Ju from 12 to 18. After a detailed analysis of all possible carriers, guided by high-level quantum chemical calculations, we conclude that the lines belong to HMgCCCN, named hydridomagnesium cyanoacetylide. The rotational temperature and column density derived for HMgCCCN are 17.1 ± 2.8 K and (3.0 ± 0.6) ×1012 cm-2, respectively. The observed abundance ratio between MgCCCN and HMgCCCN is approximately three. In addition, we report the discovery in space, also towards IRC +10216, of sodium cyanoacetylide, NaCCCN, for which accurate laboratory data are available. For this species we derived a rotational temperature of 13.5 ± 1.7 K and a column density of (1.2 ± 0.2) ×1011 cm-2.

KW - Astrochemistry

KW - ISM: individual objects: IRC +10216

KW - ISM: molecules

KW - Line: identification

KW - Molecular data

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U2 - 10.1051/0004-6361/202346462

DO - 10.1051/0004-6361/202346462

M3 - Article

AN - SCOPUS:85156210920

SN - 0004-6361

VL - 672

JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

M1 - L12

ER -

Discovery of two metallic cyanoacetylides in IRC +10216: HMgCCCN and NaCCCN

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