The orbital anisotropy profile of the Gaia-Sausage/Enceladus accretion remnant

[2509.04557] The orbital anisotropy profile of the Gaia-Sausage/Enceladus accretion remnant Skip to main content We gratefully acknowledge support from the Simons Foundation, member institutions , and all contributors.
We study the anisotropy profile of GS/E using a chemically-selected sample of stars from APOGEE DR17 and Gaia.
We fit a two-component Osipkov-Merritt anisotropy profile to the GS/E data, finding that a combination of profiles with scale radii $r_{\mathrm{a}}=2$ kpc and 547 kpc, with a mixture fraction $k_\mathrm{om} = 0.88$ provide a better fit to the data than a constant anisotropy profile.
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