Thomas Tomlinson

Slow stellar halo rotation as a signature of disc flips and GES-like mergers

Abstract The stellar halo of the Milky Way (MW) exhibits a weak net prograde rotational signal (vφ ≲ 25 km s−1), yet its origin remains unexplained. To investigate this, we use the Auriga cosmological simulation suite of MW-mass haloes to probe the rotation of stellar haloes over...