Circumstellar disc

In this chapter the capabilities of FllnS for the simulation of an observation of an external science datacube have been presented. The science case selected and presented in Sect. 6.1 has been a circumstellar disc because of its importance in the understanding of how planetary systems and habitable planets are formed. Also, due to the nature of their structure and composition, cirumstellar disks can only be measured using interferometric systems at the Infrared wavelength range. 

One possible way in which the chemistry may be enhanced is if some dusty, molecular material (say from a pre-existent circumstellar disc, cf. Chevalier 1983) is mixed into the wind. The model was adapted to include a 1% mixing (so that initially x(H2) 10" ). 

The paramount importance of carbon in the cosmos is shown by the fact that more than 75% of the approximately 120 interstellar and circumstellar molecules so far identified are carbon containing (Henning and Salama, 1998). Molecules apparently travel from the ISM via protoplanetary discs to the planetesimals and from there, via accretion, to the heavenly bodies formed. The molecules so far identified in ISM come from quite different types of compounds ... 

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