Astrophysics and Space Science

, Volume 268, Issue 1–3, pp 295–299 | Cite as

Organic Molecules in Interstellar Dust: A Possible Spectral Signature at λ2200 Å?

  • N.C. Wickramasinghe
  • F. Hoyle
  • K. Nandy


The λ2200 Å interstellar absorption band, generally attributed to graphite grains, could equally well arise from π → π*electronic transitions in conjugated double bonds of organic molecules. These molecules, which should comprise ∼ 10% of the total interstellar dust mass, may be lodged within clumps of100 Å-sized refractory grains.


Organic Molecule Band Centre Interstellar Dust Ultraviolet Absorption Spectrum Mesityl Oxide 
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Copyright information

© Kluwer Academic Publishers 1999

Authors and Affiliations

  • N.C. Wickramasinghe
    • 1
  • F. Hoyle
    • 1
  • K. Nandy
    • 2
  1. 1.Department of Applied Mathematics and AstronomyUniversity CollegeCardiffU.K.
  2. 2.Royal ObservatoryEdinburghScotland

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