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Article Contents

ABSTRACT

1.INTRODUCTION
1.1.Historical remarks
1.2.Cosmological context
1.3. Parameterization of gas accretion

2.THE OBSERVED DISTRIBUTION OF GAS AROUND THE MILKY WAY
2.1.Neutral gas
2.1.1.IVCs
2.1.2.HVCs
2.2.Warm ionized gas
2.3.Hot ionized gas
2.4.Gas-accretion rates from observations

3.SIMULATIONS OF MILKY WAY GAS ACCRETION
3.1.Hydrodynamical simulations of gas infall
3.2.Cosmological hydrodynamical simulations
3.3.Comparison with observations

4.CONCLUDING REMARKS

REFERENCES