Abstract:
Binary or multiple star formation is a primary mode of solar-type star formation. The formation mechanism of such systems is, however, less understood, compared to the formation of single stars. In this talk, I will report our recent observations of the archetypal protostellar binary system of L1551 NE with the SubMillimeter Array (SMA). The submillimeter C18O (3-2) observations have revealed presence of ~600 AU scale, Keplerian rotating disk surrounding the protostellar binary system. From the Keplerian rotation the mass, mass ratio, and the orbital period of the forming binary system are deduced to be ~0.8 M, 5.4, and ~1700 yr, respectively. I will present these results and data analyses, and discuss possible mechanism of binary star formation.
Coffee and tea will be served 20 minutes prior to the seminar.