Organic chemistry in the protosolar analogue HOPS-108: Environment matters

Context. Hot corinos are compact regions around solar-mass protostellar objects that very rich in interstellar Complex Organic Molecules (iCOMs). How the abundance of these molecules is affected by environmental physical conditions still an open question. More specifically, addressing this point key to understand our own chemical origins since Solar System formed a large cluster low- high-mass stars and was therefore subject external heating ultraviolet irradiation which may have shaped chemistry its early formation stages. Aims. The goal high resolution study determine ratios iCOMs HOPS-108, Class 0 protostar hot corino candidate located nearest analogue, OMC-2 FIR 4, Orion. We aim compare those found other corinos, all less crowded environments, order impact on corinos’ chemistry. Methods. observed 4 proto-cluster using Band 6 Atacama Large (sub-)Millimetre Array Cycle with angular ~0.??28 (110 au). determined abundances temperature species local thermodynamic equilibrium (LTE) non-LTE analysis. Results. Our results reveal organic towards asserting it where following detected: CH 3 OH, HCOOCH , OCH 18 2 DOH, COCH CHO, CN, 13 C H 5 NH CHO. Remarkably, we find possible enhancement respect known corinos. Indeed, [CH ]/[HCOOCH ] ratio source ~0.2 and, within uncertainties, deviates from correlation marginally ~1. A relatively low DOH]/[CH OH] ~0.02 also obtained, agreement another Orion source, HH212, suggesting higher gas during phases ice mantle formation. Conclusions. HOPS-108 might result different molecular complex compared regions. former cannot be reproduced current models, highlighting importance improving networks theoretical calculations. heavily clustered such as should targeted measure evaluate whether they product or exceptional overall.