ALMA Observations of Plank Galactic Cold Clumps in the Orion Cloud Complex: I. Detection of New Hot Corinos
Abstract
We report the detection of four new hot corino sources, G211.47-19.27S, G208.68-19.20N1, G210.49-19.79W and G192.12-11.10 from a survey study of Planck Galactic Cold Clumps in the Orion Molecular Cloud Complex with the Atacama Large Millimeter/submillimeter Array. Three sources had been identified as low mass Class 0protostars in the Herschel Orion Protostar Survey and one in the $\lambda$ Orionis region is firstly reported as a young stellar object (YSO). These sources bear abundant complex organic molecules (COMs), primarily methanol but also other oxygen-bearing COMs, in compact and hot regions around the central YSOs, signifying the presence of hot corinos. While our spatial resolution is not sufficient for resolving most of the molecular emission structure, the wider linewidth and high rotational temperature of COMs suggesting they may likely reside in the hotter and inner disk regions. In G211.47-19.27S, the D/H of methanol ([CH$_{2}$DOH]/[CH$_{3}$OH]) and the $^{12}$C/$^{13}$C of methanol ([CH$_{3}$OH][$^{13}$CH$_{3}$OH]) are comparable to that of other hot corinos and NH$_{2}$CHO, a pre-biotic molecule, is detected. Hydrocarbons and long carbon-chain molecules such as c-C$_{3}$H$_{2}$and HCCCN arealso detected in the four sources, likely tracing the outer and cooler molecular envelopes.
- Publication:
-
43rd COSPAR Scientific Assembly. Held 28 January - 4 February
- Pub Date:
- January 2021
- Bibcode:
- 2021cosp...43E1994H