Protostars and Planets VI, Heidelberg, July 15-20, 2013

Poster 1B071

Water Gas and Ice in Protostellar Envelopes

Schmalzl, Markus (Leiden Observatory, Leiden University)
van Dishoeck, Ewine (Leiden Observatory, Leiden University)
Mottram, Joseph (Leiden Observatory, Leiden University)
Visser, Ruud (University of Michigan)
Kristensen, Lars (Harvard-Smithsonian Center for Astrophysics)
Albertsson, Tobias (MPIA Heidelberg)
Walsh, Catherine (Leiden Observatory, Leiden University)

Infrared-bright protostars form a unique class of sources for which both water gas and ice can be observed. We introduce a Simplified Water Network (SWaN) to model the data and test it against full gas-grain models as well as Herschel-HIFI spectra of a Class 0 protostar. The combined Herschel-HIFI and Spitzer/VLT data on nine sources are then compared and analysed using SWaN, giving typical ice/gas ratios of 1e3 at the core edge and up to 1e7 deeper into the core. A quantification of the oxygen budget reveals that a large fraction of the oxygen is still unidentified.

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