Oral Presentation
Physical properties of streamers in the Class 0 protostar IRAS 16544-1604
Presenter: Miyu Kido (ASIAA/Kagoshima university)
Streamers have been detected in multiple Class 0/I protostars. However, their origin and role in disk formation remain debated. Although in the classical star formation model, the gas accretes isotropically onto the disk, the presence of the streamers suggests that the mass infall process from the envelope to the disk has a more complex picture. Understanding their physical properties is essential to assess their contribution of the mass supply to the disk. In this study, we present the physical properties of streamers and the environment of a dense core in the Class 0 protostar IRAS 16544-1604, observed by ALMA and JCMT. We identify three prominent streamers in C18O emission extending on the northern side from the protostar. By comparing the mass between streamers and a dense core, we found that the streamers only account for a few percent of the dense core. Our results suggest that these streamers contribute only a small fraction, playing a minor role in disk formation compared to the diffuse envelope component. We will discuss the role of streamers in terms of the mass supply to the disk in this target source.
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