WISHES COMING TRUE: WATER IN LOW-MASS STAR-FORMING REGIONS WITH HERSCHEL.

Authors :: Kristensen, L. E.
Visser, R.
van Dishoeck, E. F.
Yıldız, U. A.
Herczeg, G. J.
Doty, S.
Jørgensen, J. K.
van Kempen, T. A.
Brinch, C.
Wampfler, S.
Bruderer, S.
Benz, A. O.
Source :: EAS Publications Series. 2011, Vol. 52, p177-180. 4p.
Publication Year :: 2011
Abstract: Water is a key molecule for tracing physical and chemical processes in star-forming regions. The key program "Water in star-forming regions with Herschel" is observing several water transitions towards low-mass protostars with HIFI. Results regarding the 557 GHz transition of water are reported here showing that the line is surpris- ingly broad, and consists of several different velocity components. The bulk of the emission comes from shocks, where the abundance is increased by several orders of magnitude to ~10-4. The abundance of water in the outer envelope is determined to ~10-8, whereas only an upper limit of 10-5 is derived for the inner, warm envelope. [ABSTRACT FROM AUTHOR]