2024A&A...688L..13C

Query : 2024A&A...688L..13C

2024A&A...688L..13C - Astronomy and Astrophysics, volume 688L13 (2024/8-1)

More sulphur in TMC-1: Discovery of the NC3S and HC3S radicals with the QUIJOTE line survey.

CERNICHARO J., CABEZAS C., AGUNDEZ M., FUENTETAJA R., TERCERO B., MARCELINO N. and DE VICENTE P.

Abstract (from CDS):

We present the detection of the free radicals NC3S and HC3S towards TMC-1 with the QUIJOTE line survey. The derived column densities are (1.4 ± 0.2)×1011 for NC3S and (1.5 ± 0.2)×1011 for HC3S. We searched for NCCS, but only three transitions are within the domain of our QUIJOTE line survey and the observed lines are marginally detected at the 3σ level, providing an upper limit to its column density of ≤6 × 1010 cm–2. We also unsuccessfully searched for longer species of the NCnS (n ≥ 4) and HCnS (n ≥ 5) families in our TMC-1 data. A chemical model based on a reduced set of reactions involving HC3S and NC3S predicts abundances that are 10-100 times below the observed values. These calculations indicate that the most efficient reactions of formation of HC3S and NC3S in the model are S + C3H2 and N + HC3S, respectively, while both radicals are very efficiently destroyed through reactions with neutral atoms.

Abstract Copyright: © The Authors 2024

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

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 : 2024A&A...688L..13C

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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Identifiers (4) :
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HCL 2 MLB 3-28 TMC-1 [MOH94] 6

References (1872 between 1850 and 2026) (Total 1872)
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