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2012MNRAS.424.1530R - Mon. Not. R. Astron. Soc., 424, 1530-1542 (2012/August-1)
The water-ice librational band: radiative transfer model for AFGL 961.
ROBINSON G., SMITH R.G. and MALDONI M.M.
Abstract (from CDS):
Radiative transfer models have been produced for the massive pre-main-sequence object AFGL 961E, with the aim of investigating whether the 13-µm feature in its spectrum is due to the librational band of water-ice. Clearly there is water-ice somewhere in the line of sight to AFGL 961, as evidenced by the strong 3.1-µm water-ice band, and the case for the 13-µm feature being due to the librational band is uniquely strong amongst all astronomical objects. However, we present evidence that the grains may have properties similar to laboratory silicates rather than astronomical silicates and that the feature may largely be a manifestation of the 10-µm silicate feature being in self-absorption, with amorphous water-ice being a minor contributor. Neither bare astronomical silicates nor water-ice mantled astronomical silicates will reproduce the 13-µm feature.
Abstract Copyright: 2012 The Authors Monthly Notices of the Royal Astronomical Society2012 RAS
Journal keyword(s): radiative transfer - circumstellar matter - stars: individual: AFGL 961 - dust, extinction - infrared: stars
Simbad objects: 12
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