Analysis of Hot CH3OH Core around the Class 0 protostar B1-c 

Manato Shinozaki  (Kagoshima University)

We present dynamical structures and physical state of the CH3OH core around the Class 0 protostar B1-c obtained from the analysis of the ALMA Band 6 data.  B1-c is located in the Bernard 1 region (distance 300 pc) of the Perseus Molecular Cloud, which contains the First Hydrostatic Core candidates B1-bN and B1-bS. Previous observations have confirmed that B1-c is a Class 0 protostar associated with rich organic chemistry and very active jets along the south-east-north-west direction. Our analysis shows that B1-c is associated with a compact (~ ? au) CH3OH core, including multiple CH3OH (5K-4K) K-ladder emission. Furthermore, the absorption feature is observed on the redshift side in the spectra of multiple CH3OH and H2CO emission lines, which implies infalling gas motion. In this poster, we will show these results along with radiation transport models to interpret the gas motion and physical condition of the CH3OH rich core.