Detection of C3 in Diffuse Interstellar Clouds

@article{Maier2001DetectionOC,
  title={Detection of C3 in Diffuse Interstellar Clouds},
  author={J. Maier and N. Lakin and G. Walker and D. A. B. U. O. Basel and U. Columbia and H. I. O. Astrophysics},
  journal={The Astrophysical Journal},
  year={2001},
  volume={553},
  pages={267}
}
The smallest polyatomic carbon chain, C3, has been identified in interstellar clouds (Av ~ 1 mag) toward ζ Ophiuchi, 20 Aquilae, and ζ Persei by detection of the origin band in its A 1Πu-X 1Σ electronic transition, near 4052 A. Individual rotational lines were resolved up to J = 30, allowing the rotational-level column densities and temperature distributions to be determined. The inferred limits for the total column densities (~1-2 × 1012 cm-2) offer a strong incentive to laboratory and… Expand

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