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Planet-planet scattering events can leave an observable trace of a planet'smigration history in the form of orbital misalignment with respect to the thestellar spin axis, which is measurable from spectroscopic timeseries takenduring transit. We present high-resolution spectroscopic transits observed withESPRESSO of the close-in super-Earth $\pi$ Men c. The system also contains anouter giant planet on a wide, eccentric orbit, recently found to be inclinedwith respect to the inner planetary orbit. These characteristics arereminiscent of past dynamical interactions. We successfully retrieve theplanet-occulted light during transit and find evidence that the orbit of $\pi$Men c is moderately misaligned with the stellar spin axis with $\lambda =-24.0^\circ \pm 4.1^\circ$ ($\psi = 26.9^{\circ +5.8^\circ}_{\,-4.7^\circ}$).This is consistent with the super-Earth $\pi$ Men c having followed ahigh-eccentricity migration followed by tidal circularisation, and hints thatsuper-Earths can form at large distances from their star. We also detect clearsignatures of solar-like oscillations within our ESPRESSO radial velocitytimeseries, where we reach a radial velocity precision of ${\sim}20$ cm/s. Wemodel the oscillations using Gaussian processes and retrieve a frequency ofmaximum oscillation, $\nu_\text{max} = 2771^{+65}_{-60}$ $\mu$Hz. Theseoscillations makes it challenging to detect the Rossiter-McLaughlin effectusing traditional methods. We are, however, successful using the reloadedRossiter-McLaughlin approach. Finally, in an appendix we also present updatedphysical parameters and ephemerides for $\pi$ Men c from a Gaussian processtransit analysis of the full TESS Cycle 1 data.

Orbital misalignment of the super-Earth $\pi$ Men c with the spin of its star