EPoS Contribution
EPoS Contribution
Different Evolutionary Stages of the Massive Star-Forming Region S255IR Complex

Yuan Wang
Max-Planck-Institut für Astronomie, Heidelberg, Germany
The massive star-forming region S255IR complex is embraced by the Sharpless regions S255 and S257 which are already evolved HII regions. The SCUBA 850 micron observation shows three main continuum sources: S255IR in the center (a.k.a. IRAS06099+1800), and two additional mm continuum peaks toward the north and south which will be labeled S255N and S255S. In a concerted effort from near-infrared to mm wavelengths, we studied the three massive star formation regions S255IR/N/S, with the Submillimeter Array (SMA), the VLT-SINFONI, and Subaru. In this talk, I will show the multi-wavelength study results of these three region with different evolutionary stages. And in S255IR region, I will also show the near infrared spectral study results such as the age of the cluster, to reveal the interactions and relationship between the cluster members.