Fig. 6

Analysis of the water line emissions in L1157 B2. o−H2O (312 − 303)/p − H2O (111 − 000) ratio versus o−H2O (312 − 303) (in logarithmic scale, top panel), o−H2O (212 − 101)/o−H2O (110 − 101) ratio versus o−H2O (212 − 101) (middle panel), and o−H2O (312 − 303)/o−H2O (110 − 101) versus o−H2O (312 − 303)/o−H2O (212 − 101) ratios (bottom panel), for non-LTE (RADEX) plane-parallel models at the labelled temperatures. A linewidth of 5.5 km s-1 has been assumed, according to the observed spectra. Each coloured curve corresponds to the labelled NH2O (see insert at the top-left corner). H2 density increases from left to right as the labelled values. Triangles with error bars indicate the size of the emitting region (30″, 15″, 3″).
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