Does Processing or Formation of Water Ice Mantles Affect the Capacity of Nanosilicates to Be the Source of Anomalous Microwave Emission?

Anomalous microwave emission (AME) is detected in many astrophysical environments as a foreground feature typically peaking between 20–30 GHz and extending over 10–60 range. One of the leading candidates for source AME small spinning dust grains. Such grains should be very (approx. ≤1 nm diameter) order rotational to fall within observed frequency In addition, these nanosized possess significant dipole moment account emissivities. These constraints have been shown compatible with bare nanosilicate clusters, assuming that ∼1% total Si mass budget held ultrasmall Silicate can hydroxylated by processing interstellar medium generally known provide seeds molecular water ice nucleation denser regions. Herein, we use quantum chemical calculations investigate how Mg-rich pyroxenic (MgSiO 3 ) nanoclusters affected both accretion dissociative hydration. Our work thus provides an indication formation mantles likely affect capacity nanosilicates generate AME.