Poster Presentation
Searching the First Hydrostatic Cores in the Perseus Molecular Cloud
Presenter: Hao-Yuan Duan (National Tsing Hua University)
First Hydrostatic Cores (FHCs) are the transient phase between prestellar cores and Class 0 protostars. Therefore, FHCs are best targets for understanding the earliest stage of star formation. Several FHCs candidates were suggested, but none of them have been confirmed. Recently, some potential candidates of FHCs have been suggested based on the low temperature from the SED fitting (~10K-30K); however, theoretical models predicted that FHCs can be heated over 100K. The low temperature of FHCs derived from observation may be due to the mixing of the unresolved FHCs and the cold envelope. In this project, we produce synthesis images using CASA based on a simple self-similar collapse density model. We match the simulated images of First Core candidates in Perseus Molecular Cloud to the SMA and VLA observational results. Our simulations show that with both VLA and ALMA observations, we can decouple the FHC component from envelope with reasonable observing time. The identification of FHCs will make great strides in our understanding of star formation.
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