Models and Observations of Hot Molecular Cores

Details Models and Observations of Hot Molecular Cores Models and Observations of Hot Molecular Cores

Jan 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997cokon.100..207m&link_type=abstract

Communications of the Konkoly Observatory, No. 100 (Vol. XII, 2), p. 207-222 (1997)

Physics

2

Scientific paper

We review the properties of hot molecular cores with specific reference to chemical modelling, in particular, for G34.3+0.15. We show that the hot core gas in this region has an age of 5 X 10^3-10^4 yrs and that the abundances of many molecules are consistent with formation in the gas-phase following evaporation of simple molecular ices from the grains. We report on a molecular line survey of a dozen hot cores and present detailed results for CH_3CN. We find, via a modified rotation diagram method which takes optical depth into account, that CH_3CN source sizes are small and that the fractional abundances so large that grain surface formation of this species seems to be required. We end with a discussion of current problems and future directions.

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