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Carbonaceous materials in cometary environments: the case of the 3-4 micrometers bands
L Colangeli1, V Mennella, E Bussoletti
1Dipartimento di Ingegneria Industriale, University of Cassino, Italy.
Advances in Space Research : the Official Journal of the Committee on Space Research (COSPAR)
|January 1, 1992
Abstract:
We present in this paper a simulation of cometary spectra between 3 and 4 micrometers performed by using the optical properties of various carbon-based materials measured at different temperatures in the range 300-520 K. In our computations we have used new laboratory data obtained for hydrogenated amorphous carbon (HAC) grains and three kinds of polycyclic aromatic hydrocarbons (PAHs). All these materials show significant features in the near IR region; however, only the synthetic spectra obtained from HAC grains show a satisfactory agreement with the profile of the cometary bands.