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Verification of CH3OD trends in high-mass prestellar cores

Determine whether the observed trends in CH3OD and its D/H ratios seen toward high-mass protostars also apply to high-mass prestellar cores by obtaining sensitive detections and measurements of CH3OD in high-mass prestellar sources.

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Background

Comparisons between low- and high-mass sources suggest different deuteration patterns, but CH3OD has not yet been detected in high-mass prestellar cores.

Verifying whether protostellar trends originate at the prestellar stage requires CH3OD measurements in high-mass prestellar environments.

References

No measurement of CH$_3$OD exists in high-mass prestellar cores, so it is not possible to verify if this trend also extends to high-mass prestellar sources.

— First Detection of CH3OD in Prestellar Cores (2511.03581 - Kulterer et al., 5 Nov 2025) in Section 5.2 (Survival of Prestellar D/H Ratios in Methanol)