Swan band

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Spectrum of the blue flame from a butane torch showing excited molecular radical band emission and Swan bands.

Swan bands are a characteristic of the spectra of carbon stars, comets and of burning hydrocarbon fuels.^[1]^[2] They are named for the Scottish physicist William Swan who first studied the spectral analysis of radical carbon C₂ in 1856.^[3]

[edit] References

^ R.C. Johnson (1927). "The structure and origin of the Swan band spectrum of carbon". Philosophical Transactions of the Royal Society A 226 (636–646): 157–230. Bibcode 1927RSPTA.226..157J. doi:10.1098/rsta.1927.0005.
^ W.E. Pretty (1927). "The Swan band spectrum of carbon". Proceedings of the Physical Society 40: 71–78. Bibcode 1927PPS....40...71P. doi:10.1088/0959-5309/40/1/313.
^ W. Swan (1857). "On the prismatic spectra of the flames of compounds of carbon and hydrogen". Transactions of the Royal Society of Edinburgh 21: 411–430.

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