2023A&A...676L...1S

Query : 2023A&A...676L...1S

2023A&A...676L...1S - Astronomy and Astrophysics, volume 676L1-10 (2023/8-1)

Discovery of H₂CCCH⁺ in TMC-1.

SILVA W.G.D.P., CERNICHARO J., SCHLEMMER S., MARCELINO N., LOISON J.-C., AGUNDEZ M., GUPTA D., WAKELAM V., THORWIRTH S., CABEZAS C., TERCERO B., DOMENECH J.L., FUENTETAJA R., KIM W.-J., DE VICENTE P. and ASVANY O.

Abstract (from CDS):

Based on a novel laboratory method, 14 millimeter-wave lines of the molecular ion H₂CCCH⁺ have been measured in high resolution, and the spectroscopic constants of this asymmetric rotor determined with high accuracy. Using the Yebes 40 m and IRAM 30 m radio telescopes, we detected four lines of H₂CCCH⁺ toward the cold dense core TMC-1. With a dipole moment of about 0.55 D obtained from high-level ab initio calculations, we derive a column density of 5.4±1×10¹¹ cm^–2 and 1.6±0.5×10¹¹ cm^–2 for the ortho and para species, respectively, and an abundance ratio N(H₂CCC)/N(H₂CCCH⁺) = 2.8±0.7. The chemistry of H₂CCCH⁺ is modeled using the most recent chemical network for the reactions involving the formation of H₂CCCH⁺. We find a reasonable agreement between model predictions and observations, and new insights into the chemistry of C₃-bearing species in TMC-1 were obtained.

Abstract Copyright: © The Authors 2023

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

Simbad objects: 1

Full paper

View the references in ADS

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 : 2023A&A...676L...1S

Basic data :

TMC-1 -- Molecular Cloud
Other object types:	`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 [ ]`

Overlay

points in this preview

2MASS DSS

All

(CDSPortal)

Send to

Hierarchy : number of linked objects
whatever the membership probability is (see description here ) :

An access of full data is available using the icon Vizier near the identifier of the catalogue

HCL 2 MLB 3-28 TMC-1 [MOH94] 6

References (1872 between 1850 and 2026) (Total 1872)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).

Follow new references on this object

Observing logs

External archives :

Search by coordinates in Vizier (radius: 5 arcsec)

Annotations :
Annotations allow a user to add a note or report an error concerning the astronomical object and its data. It requires registration to post a note. See description .
Please, have a look at Best practices. The list of all annotations to SIMBAD objects can be found here .

The annotation server is currently not available. Sorry for any inconvenience

To bookmark this query, right click on this link: simbad:objects in 2023A&A...676L...1S and select 'bookmark this link' or equivalent in the popup menu