little dependence on radius or metallicity, in general agreement with the observations. The weak halo rotation suggests that the Milky Way has a minor *in situ* halo component, and has undergone a relatively quiet accretion history.'
author:
- |
    Alis J. Deason$^{1}$[^1], Vasily Belokurov$^{2}$, Sergey E. Koposov$^{2,3}$, Facundo A. Gómez$^{4}$, Robert J. Grand$^{5,6}$, Federico Marinacci$^{7}$, Rüdiger Pakmor$^5$\
    $^{1}$Institute for Computational Cosmology, Department of Physics, University of Durham, South Road, Durham DH1 3LE, UK\
    $^{2}$Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge CB3 0HA, UK\
    $^{3}$McWilliams Center for Cosmology, Department of Physics, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, PA 15213, USA\
    $^{4}$Max-Planck-Institut für Astrophysik, Karl-Schwarzschild-Str. 1, D-85748, Garching, Germany\
    $^{5}$ Heidelberger Institut für Theoretische Studien, Schloss-Wolfsbrunnenweg 35, 69118 Heidelberg, Germany\
    $^{6}$ Zentrum für Astronomie der Universität Heidelberg, Astronomisches Recheninstitut, Mönchhofstr. 12-14, 69120 Heidelberg, Germany\
    $^{7}$Department of Physics, Kavli Institute for Astrophysics and Space Research, MIT, Cambridge, MA 02139, USA
bibliography:
- 'mybib.bib'
date: 'Accepted XXX. Received YYY; in original form ZZZ'
title: The slight spin of the old stellar halo
---

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Galaxy: halo – Galaxy: kinematics and dynamics – Galaxy: stellar content

Introduction
============

Dark matter haloes have spin. This net angular momentum is acquired by tidal 