2021A&A...646L...1C


Query : 2021A&A...646L...1C

2021A&A...646L...1C - Astronomy and Astrophysics, volume 646, L1-1 (2021/2-1)

Space and laboratory observation of the deuterated cyanomethyl radical HDCCN.

CABEZAS C., ENDO Y., ROUEFF E., MARCELINO N., AGUNDEZ M., TERCERO B. and CERNICHARO J.

Abstract (from CDS):

Our observations of TMC-1 with the Yebes 40m radio telescope in the 31.0-50.3GHz range allowed us to detect a group of unidentified lines, showing a complex line pattern indicative of an open-shell species. The observed frequencies of these lines and the similarity of the spectral pattern with that of the 20,2-10,1 rotational transition of H2CCN indicate that the lines arise from the deuterated cyanomethyl radical, HDCCN. Using Fourier transform microwave spectroscopy experiments combined with electric discharges, we succeeded in producing the radical HDCCN in the laboratory and observed its 10,1-00,0 and 20,2-10,1 rotational transitions. From our observations and assuming a rotational temperature of 5K, we derive an abundance ratio H2CCN/HDCCN=20±4. The high abundance of the deuterated form of H2CCN is well accounted for by a standard gas-phase model, in which deuteration is driven by deuteron transfer from the H2D+ molecular ion.

Abstract Copyright: © ESO 2021

Journal keyword(s): astrochemistry - ISM: molecules - ISM: individual objects: TMC-1 - line: identification - molecular data

VizieR on-line data: <Available at CDS (J/A+A/646/L1): table.dat>

Simbad objects: 3

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Number of rows : 3
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 TMC-1 MoC 04 41 45.9 +25 41 27           ~ 1537 0
2 LDN 1544 DNe 05 04 16.6 +25 10 48           ~ 788 0
3 NAME Orion Bright Bar reg 05 35 22.30 -05 24 33.0           ~ 805 0

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2022.08.10-19:36:24

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