SIMBAD references

2016ApJ...817..147T - Astrophys. J., 817, 147 (2016/February-1)

Implication of formation mechanisms of HC5 N in TMC-1 as studied by 13C isotopic fractionation.

TANIGUCHI K., OZEKI H., SAITO M., SAKAI N., NAKAMURA F., KAMENO S., TAKANO S. and YAMAMOTO S.

Abstract (from CDS):

We observed the J = 9 - 8 and 16 - 15 rotational transitions of the normal species and five 13C isotopologues of HC5 N to study its formation mechanisms toward the cyanopolyyne peak in Taurus Molecular Cloud-1, with the 45-m radio telescope of the Nobeyama Radio Observatory. We detected the five 13C isotopologues with high signal-to-noise ratios between 12 and 20, as well as the normal species. The abundance ratios of the five 13C isotopologues of HC5N are found to be 1.00:0.97:1.03:1.05:1.16 (±0.19) (1σ) for [H13CCCCCN]:[HC13CCCCN]:[HCC13CCCN]:[HCCC13CCN]:[HCCCC13CN]. We do not find any significant differences among the five 13C isotopologues. The averaged [HC5N]/[13C isotopologues] abundance ratio is determined to be 94±6 (1σ), which is slightly higher than the local interstellar elemental 12C/13C ratio of 60-70. Possible formation pathways are discussed on the basis of these results.

Abstract Copyright:

Journal keyword(s): astrochemistry - ISM: individual: TMC-1 - ISM: molecules

Simbad objects: 4

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2019.11.12-15:40:13

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