Physical structures of streamers in the Class 0 protostar IRAS 16544-1604

Miyu Kido  (Kagoshima University)

The elongated molecular-gas components, so called streamers, detected in the protostars indicates trajectory of the material accreting from the envelope to the protostellar disk. These structures cannot be explained by the classical model of isotropic accretion from a spherically symmetric envelope. Hence, the physical difference between the streamer and infalling envelope needs to be clarified.

We will report our latest eDisk results of the Class 0 protostar, IRAS 16544-1604. At least three candidate streamers are detected in the C18O emission on the northern side. While the northeastern streamer has a mass similar to that of streamers in other protostars, the accretion rate is an order of magnitude smaller than typical values. We also created an accretion model to compare with the spatial and velocity structures of streamers. We will discuss these results in this presentation.