Astronomy and Astrophysics – Astrophysics
Scientific paper
Oct 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998a%26a...338l..21d&link_type=abstract
Astronomy and Astrophysics, v.338, p.L21-L24 (1998)
Astronomy and Astrophysics
Astrophysics
26
Ism: Dust, Extinction, Ism: Individual Objects, Infrared: Ism: Continuum, Infrared: Ism: Lines And Bands
Scientific paper
We report the detection of the transverse optical vibrational band of water ice at 44 microns in absorption towards two embedded infrared sources, IRAS 18316-0602 (RAFGL7009S) and IRAS 19110+1045. The water band extending from 30 to about 80 microns is a prominent feature in the combined ISO SWS and LWS grating spectra. Using new optical constants for amorphous and crystalline water ice, we have modeled the infrared spectra of the two embedded sources with a radiative transfer code. Most of the observed absorption bands are well fit by H_2O, CO, and CO_2 ice mantles on silicate and graphite cores. Based on observations with ISO, an ESA project with instruments funded by ESA Member States (especially the PI countries: France, Germany, the Netherlands and the United Kingdom) and with the participation of ISAS and NASA
Cox Pierre
d'Hendecourt Louis
Dartois Emmanuel
Heras Ana M.
Jones Adrian P.
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