Siegel der Universität

Universität zu Köln
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Mathematisch-Naturwissenschaftliche Fakultät
Fachgruppe Physik

I. Physikalisches Institut

Large-scale mapping of turbulent clouds

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We are involved in systematic, velocity-resolved mapping observations of interstellar clouds in multiple tracers with particular focus on the phase transition between diffuse, ionized, and molecular components.

Comparison of the spatial structure of molecular, atomic, and ionized gas, dust, and PAHs in M17SW. The upper panels contain IRAC images at 3.6, 4.5 and 5.8µm or 4.5, 5.8, and 8.0µm as false color plots (Povich et al. 2007) superimposed by the integrated intensity of CO 6-5 (left, Pérez-Beaupuits et al. 2010) and [CII] (right). The lower panels show the velocity structure of those tracers in colors, representing velocities between 8, 18, 28, and 38km/s, superimposed by the integrated intensities of CO 13-12 and the 21cm free-free continuum (Brogan & Troland 2001).

The extended mapping observations allow to measure spatial scaling relations over a dynamic range covering more than three orders of magnitude and tracers of different phases of the ISM.