title: Observations of chemical processing in the circumstellar environment.
abstract: High resolution interferometer and single-dish observations of young, deeply embedded stellar systems reveal a complex chemistry in the circumstellar environments of low to intermediate mass stars.  Depletions of gas-phase molecules, grain mantle evaporation, and shock interactions actively drive chemical processes in different regions around young stars.  We present results for two systems, IRAS 05338-0624 and NCG 1333 IRAS 4, to illustrate the behavior found and to examine the physical processes at work.
authors.affiliation: Astronomy Department, Univ. of Maryland, USA.
authors.forename: L G
authors.initials: LG
authors.lastname: Mundy
authors.forename: J P
authors.initials: JP
authors.lastname: McMullin
authors.forename: G A
authors.initials: GA
authors.lastname: Blake
mesh_terms: D055580:Astronomical Phenomena; D001256:Astronomy; D002248:Carbon Monoxide / Q000737:chemistry*; D055598:Chemical Phenomena; D002621:Chemistry; D005118:Extraterrestrial Environment; D005740:Gases / Q000032:analysis*; D007368:Interferometry; D008027:Light; D017655:Silicon Compounds
chemical_list: D005740:Gases; D017655:Silicon Compounds; D002248:Carbon Monoxide