Detection of C5 in the Circumstellar Shell of IRC+10216

@article{Bernath1989DetectionOC,
  title={Detection of C5 in the Circumstellar Shell of IRC+10216},
  author={Peter F. Bernath and Kenneth H. Hinkle and John Joseph Keady},
  journal={Science},
  year={1989},
  volume={244},
  pages={562 - 564}
}
The C5 molecule has been identified in the infrared spectrum of the prototypical obscured carbon star, IRC+10216. In addition to their astrophysical importance, pure carbon chain molecules such as C5 are of interest in the chemistry of flames and propellants. 

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References

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Cartographie de l'enveloppe circumstellaire de cette etoile carbonee pour toutes les transitions hyperfines dans l'etat de base de C 2 H et CN

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Results of aperture synthesis mapping of line emission from the molecules HNC, C/sub 2/H, and HC/sub 3/N in the envelope of the carbon star IRC +10216 are presented. The observations of the molecules

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Assuming a steady and spherically symmetric mass loss, the spatial distribution of the ionization in a C-rich circumstellar envelope (CSE) is calculated, and it is shown that molecular ions dominate

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Nearly 30 lines of C/sub 2/H in two bands at 4011 and 4108/cm have been identified in the 2 micron spectrum of IRC +10216. A rotational temperature of about 12.5 + or - 1.5 K and a column density of
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