The Chemodynamics of Interstellar Objects

In preparation for Rubin and an upcoming targeted precursor survey on CFHT, we present the latest version of the Ōtautahi-Oxford model for the detection of ISOs by LSST, including predictions for the velocity distribution of such objects in the solar neighbourhood derived from Gaia along with predictions from a simple chemical model. The combination produces a rich ‘chemodynamic’ signature with correlations between velocity, chemistry and age, allowing us to test the model with the expected yield from LSST.  These correlations with velocity allow us to infer the properties of each ISO upon discovery, allowing the prioritisation of exceptional objects for time-critical follow-up. We also describe future improvements to the model, including a more sophisticated chemical treatment, which will increase its explanatory power.