Speaker
Michael Petersen
(University of Edinburgh)
Description
The ongoing interaction of the Large Magellanic Cloud (LMC) and Milky Way (MW) allows for constraint of the mass (and profile) of both. Through comparison of models of the interaction and 6d halo star data, we determined that the LMC is currently both pulling the MW stellar disc away from the barycentre of the MW at 30 km/s, as well as inducing a measurable distortion in the outer halos of both the MW and LMC. These effects emphasise the need to move away from equilibrium models when attempting to measure the mass distributions of either. Models for the M33-M31 interaction -- a similar mass ratio -- reveal a markedly different interaction, with significantly smaller effects owing to the orbital history.
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Primary authors
Michael Petersen
(University of Edinburgh)
Jorge Peñarrubia
(University of Edinburgh)
