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The Line-of-Sight Distribution of Water in SgrB2

Comito, C. and Schilke, P. and Gerin, M. and Phillips, T. G. and Zmuidzinas, J. and Lis, D. C. (2004) The Line-of-Sight Distribution of Water in SgrB2. In: The Dense Interstellar Medium in Galaxies. Springer Proceedings in Physics. No.91. Springer Berlin Heidelberg , Berlin, Heidelberg, pp. 265-268. ISBN 9783642623486.

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The SgrB2 cloud is one of the most massive star forming regions in our Galaxy. It has many unique characteristics, among them an exceptional chemistry. Several species (FeO, [21]; NH_2, [20]; HF, [15]; C_3, [7]) have, in spite of searches elsewhere, been detected only toward this source. One possible explanation for this enigmatic chemistry is the existence of a layer of hot gas, which is thought to be produced by a shock. Since this layer has the same velocity as the ambient gas in SgrB2, it has been proven difficult to assess its importance for the chemistry of many species, with a few exceptions. In particular its importance for the water chemistry has been a matter of recent debate ([3]; [17]). While its temperature and density are well known (cf. [9]), its column density and width have remained elusive. In this work (illustrated in detail in [5]) we have been able to determine its importance for water chemistry and give constraints for column density and spatial width, by modeling the HDO and H_2^(18)O emission and absorption.

Item Type:Book Section
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URLURL TypeDescription Paper ReadCube access
Schilke, P.0000-0003-2141-5689
Lis, D. C.0000-0002-0500-4700
Alternate Title:Line-of-sight distribution of water towards the SgrB2 complex
Additional Information:© Springer-Verlag Berlin Heidelberg 2004.
Subject Keywords:Massive Star; Column Density; Spatial Width; Radiative Transport Equation; Radiative Transfer Code
Series Name:Springer Proceedings in Physics
Issue or Number:91
Record Number:CaltechAUTHORS:20190826-124739891
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:98237
Deposited By: George Porter
Deposited On:26 Aug 2019 21:14
Last Modified:16 Nov 2021 17:37

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