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Universität zu Köln
Mathematisch-Naturwissenschaftliche Fakultät
Fachgruppe Physik

I. Physikalisches Institut

Members of the institute succeeded in the open race for Herschel observing time

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Several proposal had been submitted for observations with Herschel related to the first of two calls for open time projects. The Herschel Observing Time Allocation Committee (HOTAC) sent out its decisions November 4 and 5. Members of the institute are are principal investigators in three of the successful proposals and are involved in several more.

Dr. Volker Ossenkopf leads a project to search for sources of hot oxydaniumyl, H2O+. This cation has turned out to be rather abundant in Galactic, see the news from 2010-07-16 and the entry on the molecules in space page of the CDMS, but appeared thus far only in absorption, whereas it has been seen also in emission in higher excited transitions in some Extragalactic sources. Hot H2O+ may be produced by radiative pumping, but also by the evaporation of water ice from dust grains and its subsequent ionization. The project searches for this hot oxidaniumyl in two Galactic sources, DR21 and MonR2, where some hints for its possible existence exist.

Philipp Carlhoff's project is concerned with searches for C+ in the giant molecular complex W43, that is located in the Galactic plane. It aims to map the cloud's filamentary structure in high spectral resolution with HIFI. By that the origins of star formation in the framework of the "converging flows" model will be studied. This model explains the formation of filaments and dense cores by colliding flows of molecular gas.

Dr. Markus Röllig will investigate high-mass star formation in the prominent star forming region DR21 by looking into the influences of shocks, outflows and intense UV radiation on the surrounding material. These observations will help to illuminate the condition of the molecular clouds from which massive stars form and to understand the complexinteraction between newborn stars and the interstellar medium.

(hspm 2010-11-05)