Siegel der Universität

Universität zu Köln
Mathematisch-Naturwissenschaftliche Fakultät
Fachgruppe Physik

I. Physikalisches Institut

Massive Star Formation in its earliest stages: The massive young cluster G333.6-0.2

Betreuer: Prof. Andreas Eckart, Raum 205, 470-3546

O/B type stars evolve within less than 100,000 years toward the main sequence and disperse their natal cloud by their intense radiation and winds. Therefore, observations of such massive stars in their earliest phases are extremely rare. The southern HII region G333.6-0.2 is an extremely young, embedded site of massive star formation. Adaptive optics imaging observations of G333.6-0.2 with NACO at the ESO VLT show it contains at least a dozen early B/late O stars. The KLF of the cluster appears flat at the bright end. The existing near infrared multi-wavelength imaging data on this object should be analysed in the framework of a diploma thesis. The structure of the cluster, its luminosity function and the colors of the young stars should be derived. Are there indications for mass segregation? Are there massive stars with infrared excess that indicates that they are still surrounded by some of the material from which they were born? The cluster should be compared with other young clusters. Follow-up observations may become available or can be applied for with the results of the analysis.


Mid-infrared imaging observations of the center of the Milky Way

Betreuer: Prof. Andreas Eckart, Raum 205, 470-3546

Imaging observations of the Galactic Center at a wavelength of 10 mum were obtained by our group in June 2006. We offer a diploma thesis on the analysis of the available data. What are the properties of the detectable point sources? What are the characteristics of the diffuse emission and of the visible shock fronts? Can variability of point sources or of extended sources be detected by combining the available data with older images? What do we learn from the mid-infrared emission in the circum-nuclear disk, the ring of dense molecular gas that surrounds the ~3 pc diameter central cavity?