Discovery of HC3O+ in space: The chemistry of O-bearing species in TMC-1.

@article{Cernicharo2020DiscoveryOH,
  title={Discovery of HC3O+ in space: The chemistry of O-bearing species in TMC-1.},
  author={Jos{\'e} Cernicharo and N. Marcelino and Marcelino Ag{\'u}ndez and Yasuki Endo and Carlos Cabezas and C. Berm{\'u}dez and Bel{\'e}n Tercero and Pablo de Vicente},
  journal={Astronomy and astrophysics},
  year={2020},
  volume={642}
}
Using the Yebes 40m and IRAM 30m radio telescopes, we detected a series of harmonically related lines with a rotational constant B 0=4460.590±0.001 MHz and a distortion constant D 0=0.511 ±0.005 kHz towards the cold dense core TMC-1. High-level-of-theory ab initio calculations indicate that the best possible candidate is protonated tricarbon monoxide, HC3O+. We have succeeded in producing this species in the laboratory and observed its J u -J l = 2-1 and 3-2 rotational transitions. Hence, we… 

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References

SHOWING 1-10 OF 49 REFERENCES

Tentative detection of HC5NH+ in TMC-1.

From a comparison between calculated and observed rotational constants and other arguments based on proton affinities and dipole moments, it is concluded that the best candidate for a carrier of the observed lines is the protonated cyanodiacetylene cation, HC5NH+.

Probing non polar interstellar molecules through their protonated form: Detection of protonated cyanogen (NCCNH+).

The first solid evidence of the presence of cyanogen in interstellar clouds through the detection of its protonated form toward the cold dark clouds TMC-1 and L483 is presented.

Discovery of Interstellar Isocyanogen (CNCN): Further Evidence that Dicyanopolyynes Are Abundant in Space

It is estimated that NCCN could be fairly abundant, in the range 10-9-10-7 relative to H2, as other abundant nitriles like HCN and HC3N.

Detection of C3O in IRC +10216: Oxygen-Carbon Chain Chemistry in the Outer Envelope

The oxygen-bearing species C3O has been identified in the circumstellar envelope of the carbon star IRC +10216. The J = 8 → 7, 9 → 8, 10 → 9, 14 → 13, and 15 → 14 transitions were detected at 2 and 3

Interstellar nitrile anions: Detection of C3N- and C5N- in TMC-1.

The detection of C5N- in TMC-1 gives strong support for assigning to this anion the lines found in IRC +10216, as it excludes the possibility of a metal-bearing species, or a vibrationally excited state.

Discovery of interstellar propylene (CH2CHCH3): Missing links in interstellar gas-phase chemistry

We report the discovery of propylene (also called propene, CH2CHCH 3) with the IRAM 30 m radio telescope toward the dark cloud TMC-1. Propylene is the most saturated hydrocarbon ever detected in

IMPLICATION OF FORMATION MECHANISMS OF HC5N IN TMC-1 AS STUDIED BY 13C ISOTOPIC FRACTIONATION

We observed the J = 9 − 8 and 16 − 15 rotational transitions of the normal species and five 13C isotopologues of HC5N to study its formation mechanisms toward the cyanopolyyne peak in Taurus

Discovery of two new magnesium-bearing species in IRC+10216: MgC3N and MgC4H.

The synthesis of these magnesium cyanides and acetylides in IRC +10216 can be explained in terms of a two-step process initiated by the radiative association of Mg+ with large cyanopolyynes and polyynes followed by the dissociative recombination of the ionic complexes.

Discovery of interstellar ketenyl (HCCO), a surprisingly abundant radical.

The first identification in space of the ketenyl radical (HCCO) toward the starless core Lupus-1A and the molecular cloud L483 is presented, and the detection of the related molecules ketene (H2 CCO) and acetaldehyde (CH3CHO) in these two sources and 3 additional dark clouds are reported.

A theoretical investigation of the astrophysically important molecules C3O and HC3O

Large‐scale CEPA calculations have been carried out for the astrophysically important molecules C3O and HC3O+. C3O has a linear equilibrium geometry with short terminal CC and CO bond lengths of