# Journal article

## The rise and fall of stellar discs across the peak of cosmic star formation history: mergers versus smooth accretion

Abstract:

Building galaxy merger trees from a state-of-the-art cosmological hydrodynamics simulation, Horizon-AGN, we perform a statistical study of how mergers and smooth accretion drive galaxy morphologic properties above $z > 1$. More specifically, we investigate how stellar densities, effective radii and shape parameters derived from the inertia tensor depend on mergers of different mass ratios. We find strong evidence that smooth accretion tends to flatten small galaxies over cosmic time, leadi...

### Authors

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Institution:
University of Oxford
Division:
MPLS
Department:
Physics
Sub department:
Astrophysics
Role:
Author
Keywords:
Pubs id:
pubs:508404
UUID:
uuid:3f40c9db-27de-49ce-a4ef-4101ee524645
Local pid:
pubs:508404
Source identifiers:
508404
Deposit date:
2016-07-20