Publication: Modeling Water Emission from Intermediate Mass Star Formation Regions

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Title	Modeling Water Emission from Intermediate Mass Star Formation Regions
Authors/Editors*	M., Hillier
Where published*	U.Waterloo
How published*	Thesis
Year*	2008
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Abstract	In this research water emission is modeled from intermediate mass star formations regions placed at 1 kpc. Nine models are created to describe these regions of varying source luminosity (L = 100, 500, and 1000L) and protostellar envelope mass (M = 10, 100, and 500M). For each model, an intermediate mass class 0 protostar is centrally embedded in a spherically symmetry static protostellar envelope. Radiation transfered through these regions is calculated using the program RATRAN that applies an accelerated Monte Carlo method to obtain level population profiles of water. The level populations are used to determine the emission distribution of water from the regions by using a ray tracing method. Strong correlations between line ratios, integrated intensities and source luminosity are found. Larger envelope masses resulted in more mass going in the outer envelope where the water is frozen and does not contribute to the water emission and absorption. Line strengths, ratios, and integrated intensities for all the spectral lines of water within Herschelâs observation range are tabulated.