The following document lists the file abstract/PMORRIS_G79ICES1.abs
from catalogue VI/111.
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Ice bands due to water, CO2, and hexane, and probabl absorption by CO and CH3OH have been discovered in the vicinity of the massive B supergiant and radio shell source G79.29+0.46. These were discovered during calibration time, previously unexpected, and may be formed in a compact nebula or equatorial outflow evidenced in recent ground-based and ISOCAM observations. The central source of G79.29+0.46 is one of only 10 Galactic stellar sources known or suspected to be a Luminous Blue Variable, is highly reddened, and is surrounded by a ring nebula. As such, it is a rare source for exploring the physical chemistry of an ice-forming region to be contrasted with embedded YSOs and interstellar molecular clouds observed with ISO. The chemistry that probably include gas-phase molecules and crystalline silicates could provide key evidience for the mass-loss history of G79.29+0.46 and the B-LBV-RSG filiation that is a matter of serious debate between observations and theory. We ask for 12000 seconds of Discretionary Observing Time to scan the central source and one position off-source with SWS at maximum grating resolution (SWS06). In a complementary proposal we ask Discretionary Observing Time to map the H2O 3.07 micron ice with ISOCAM using circular variable filters.