20-24 March 2023
Haus H, Telegrafenberg
Europe/Berlin timezone

The LMC-induced distortion of the Milky Way (and vice versa)

23 Mar 2023, 09:40
15m
Haus H, Telegrafenberg

Haus H, Telegrafenberg

Potsdam, Germany
Contributed talk SESSION 4 : The Magellanic System: the Clouds, the Stream and the Leading Arm SESSION 4 : The Magellanic System: the Clouds, the Stream and the Leading Arm

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)

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