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Article Contents

ABSTRACT

1.INTRODUCTION

2.QUANTIFYING ORIENTATIONS AND SHAPES
2.1.Using orientations
2.2.Spin alignments
2.3.Measuring shapes
2.3.1.Shape measurement systematics
2.3.2.Intrinsic alignment measurements and cosmic shear

3.SHAPE CORRELATIONS
3.1.Two-point correlation functions
3.2.Estimators of the two-point correlation functions
3.3.Projected correlation functions
3.4.Using correlation functions to test intrinsic alignment models
3.5.Tests for systematics

4.OBSERVATIONS OF ALIGNMENT IN LARGE GALAXY SAMPLES
4.1.Late-type galaxies
4.2.Early-type Galaxies
4.3.Other Large-Scale Measurements

5.ENVIRONMENTALLY DEPENDENT ALIGNMENTS
5.1.Galaxy position alignments in the field and the Local Group
5.2.Galaxy alignments within galaxy groups and clusters
5.3.Galaxy alignments with voids
5.4.Galaxy alignments with filaments and sheets
5.5.Alignments between galaxy groups and clusters

6.IMPACT ON COSMOLOGY & MITIGATION
6.1.Quantifying Impact
6.2.Exploiting redshift dependence
6.3.Parameterisation and marginalisation
6.4.Self-calibration
6.5.Higher-order cosmic shear statistics
6.6.Probes of the unlensed galaxy shape
6.6.1.Radio polarisation as a tracer of intrinsic orientation
6.6.2.Rotational velocities as a tracer of intrinsic orientation

7.SUMMARY & OUTLOOK

REFERENCES