Travis Thieme (NTHU); Shih-Ping Lai (NTHU)
Investigating the accretion flows onto Keplerian disks around young protostars is crucial to understanding how these disks form, grow and evolve. MHD simulations show spiral-like streams of material merging with the disk (Li et al. 2014, Seifried et al. 2015). These streams have also been reported in several Class I protostars (Tokuda et al. 2014, Yen et al. 2014, Takakuwa et al. 2017), but only in one Class 0 source (VLA1623: Cheong et al., in prep). We report our initial findings of two possible accretion flow-like structures around another Class 0 protostar Lupus 3 MMS using ALMA Cycle 2 observations of C18O (J=2-1). We expect to perform an analysis using a dendrogram algorithm (Goodman et al. 2008) to study the kinematics of the accretion flows and ultimately try to fit our streams with the CMU model (Ulrich 1976, Cassen & Moosman 1981, Tobin et al. 2012), which describes the trajectory and velocity of a freefalling material with constant angular momentum.