Carbon Onions: Carriers of the 217.5 nm Interstellar Absorption Feature

Manish Chhowalla, H. Wang, N. Sano, K. B.K. Teo, S. B. Lee, G. A.J. Amaratunga

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Ultraviolet-visible absorption measurements of high purity and well separated carbon onion samples are reported. The results show that, after purification, absorption features from carbon onions match well with the interstellar UV spectrum. The measurements show that the absorption peak position remains constant at [Formula presented], and the width varies from [Formula presented], a key feature of the interstellar spectrum. The similarities between the experimental and observed absorption spectra indicate that carbon onions are very strong candidates for the origin of the UV interstellar absorption peak at [Formula presented].

Original languageEnglish
Number of pages1
JournalPhysical Review Letters
Issue number15
Publication statusPublished - Jan 1 2003


ASJC Scopus subject areas

  • Physics and Astronomy(all)

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