ALMA Survey of Orion Planck Galactic Cold Clumps (ALMASOP): A Hot Corino Survey toward Protostellar Cores in the Orion Cloud

Shih Ying Hsu, Sheng Yuan Liu, Tie Liu, Dipen Sahu, Chin Fei Lee, Kenichi Tatematsu, Kee Tae Kim, Naomi Hirano, Yao Lun Yang, Doug Johnstone, Hongli Liu, Mika Juvela, Leonardo Bronfman, Huei Ru Vivien Chen, Somnath Dutta, David J. Eden, Kai Syun Jhan, Yi Jehng Kuan, Chang Won Lee, Jeong Eun LeeShanghuo Li, Chun Fan Liu, Sheng Li Qin, Patricio Sanhueza, Hsien Shang, Archana Soam, Alessio Traficante, Jianjun Zhou

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)


The presence of complex organic molecules (COMs) in the interstellar medium 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 Atacama Large Millimeter/submillimeter Array Survey of Orion Planck Galactic Cold Clumps 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 of the hot corino sources discovered are likely Class 0, and their sizes of the warm region (>100 K) are comparable to 100 au. The luminosity of the hot corino sources exhibits positive correlations with the total number of methanol and the extent of its emissions. Such correlations are consistent with the thermal desorption picture for the presence of hot corinos and suggest that the lower-luminosity (Class 0) sources likely have a smaller region with COM emissions. With the same sample selection method and detection criteria being applied, the detection rates of the warm methanol in the Orion cloud (15/37) and the Perseus cloud (28/50) are statistically similar when the cloud distances and the limited sample size are considered. Observing the same set of COM transitions will bring a more informative comparison between the cloud properties.

Original languageEnglish
Article number218
JournalAstrophysical Journal
Issue number2
Publication statusPublished - 2022 Mar 1

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science


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