A Hot Corino Survey toward Orion Class 0/I Protostellar Cores with the ALMASOP Project

Shih-Ying Hsu^1,2*, Sheng-Yuan Liu², Tie Liu³

¹Physics, National Taiwan University, Taipei, Taiwan
²Institute of Astronomy and Astrophysics, Academia Sinica, Taipei, Taiwan
³Shanghai Astronomical Observatory, Chinese Academy of Sciences, Shanghai, China

* Presenter:Shih-Ying Hsu, email:seansyhsu@gmail.com

The presence of complex organic molecules (COMs) in the interstellar medium (ISM) is of great interest since it may link to the origin and prevalence of life in the universe. Aiming to investigate the occurrence of COMs and their possible origins, we conducted a chemical census toward a sample of protostellar cores as part of the ALMA Survey of Orion PGCCs (ALMASOP) project. We report the detection of 11 hot corino sources, which exhibit compact emissions from warm and abundant COMs, among 56 Class 0/I protostellar cores. All the hot corino sources discovered are likely Class 0. The luminosity of the hot corino sources exhibits positive correlations with the total amount of the methanol component, the angular size of the methanol component, and the size of the warm region. Such correlations are consistent with the thermal desorption picture for the presence of hot corino and suggest that the lower luminosity (Class 0) sources likely have a smaller region with COMs emissions.

Keywords: Astrochemistry, Interstellar medium, Star Formation