Merger and Ring Galaxy Formation Rates at z<=2

Details Merger and Ring Galaxy Formation Rates at z<=2 Merger and Ring Galaxy Formation Rates at z<=2

2008-03-04

arxiv.org/abs/0803.0545v2

Astronomy and Astrophysics

Astrophysics

Accepted for a publication on MNRAS. More references added and a comparison with previous works

Scientific paper

10.1111/j.1365-2966.2008.13625.x

We compare the observed merger rate of galaxies over cosmic time and the frequency of collisional ring galaxies (CRGs), with analytic models and halo merger and collision rates from a large cosmological simulation. In the Lambda cold dark matter (LCDM) model we find that the cosmic {\it merger fraction} does not evolve strongly between 0.2

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