Visit ASIAA Homepage Registration Deadline: November 27, 2019 (Taiwan Time)
East-Asian ALMA Science Workshop 2019
February 19(Wed)-21(Fri), 2020
ASIAA, Taipei, Taiwan

Poster Presentation

Modeling the First Hydrostatic Core Candidates Barnard 1b-N and 1b-S

Author(s): Hao-Yuan Duan (NTHU), Shih-Ping Lai (NTHU)

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 the best targets for understanding the earliest stage of star formation. Till today, Several FHCs candidates were suggested, but none of them have been confirmed. Most of the potential candidates have been suggested based on the low temperature from the SED fitting ($\sim$ 10K-30K) since FHCs are deeply obscured in the parent envelopes with very large column density; however, theoretical models predicted that FHCs can be heated over 100K. Detailed studies of first core candidates are needed to cross check the theoretical predictions. In this work, we produce simulated synthesis images of two first cores candidate, B1-bN and B1-bS, based on a simple model which contains a self-similar collapse envelope and a hot-driven source at the center. We match our simulated images to real SMA and ALMA observational results of the two FHC candidates. Our simulations show that we can decouple a hos-driven source from the cold envelope with interferometer observations. The identification of FHCs will make great strides in our understanding of star formation.

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