Poster Presentation

Exploring the Outflow Kinematics in the Cluster-Forming Region W3 IRS5

Vivien Chen (NTHU), and Samantha Chen (NTHU)

Unlike the formation of Solar-type stars,massive stars is not well-understood.Because of their large distances, massive star-forming regions require high angular resolutions to resolve cluster members. Consequently, Sub-Millimeter Array(SMA)’s high-angular resolutions enable us to research extremely high velocity(EHV) outflows in the protocluster W3 IRS5 (d=1.83 kpc, L~10^5Lsun).This is a super-compact HII region which is inside W3 main.
In our new SMA observation at resolutions 2”~6” with compact and sub-compact configurations, we have resolved the highly-collimated morphology of two CO(3-2) outflow pairs.The blue-shifted and red-shifted are integrated over the line wing CO(3-2), with velocity 0~-100km/s. Apart from CO(3-2), we also track SiO(8-7) to examine the complex kinematic structure of W3 IRS5.