Detection of a new emission band at 2.8 µm in comet P/Halley

  • A. T. Tokunaga
  • T. Nagata
  • R. G. Smith
Conference paper


A 2.8- to 3.7-gm spectrum of comet Halley taken in May 1986 is presented. The spectrum shows (1) the 3.36-gm emission feature that most likely arises from carbonaceous material, (2) a previously unknown emission band at 2.8-2.9 gm, and (3) no evidence for the 3-gm water-ice band either in reflection or absorption. The 2.8- to 2.9-gm emission feature does not arise from infrared fluorescence from water or OH. Since LTE emission from water is unlikely, the nature of this feature is uncertain.

Key words

Comets infrared radiation infrared spectroscopy 


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Copyright information

© Springer-Verlag Berlin Heidelberg 1988

Authors and Affiliations

  • A. T. Tokunaga
    • 1
  • T. Nagata
    • 1
  • R. G. Smith
    • 1
  1. 1.Institute for AstronomyUniversity of HawaiiHonoluluUSA

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