May 2016

AGN_fraction_z.001

Do galaxy mergers trigger AGN activity?

This plot shows that the fraction of AGN in both minor and major mergers (dashed and solid lines) is clearly higher than for non-merging galaxies (dotted lines). This is visible over a large range of redshifts and shows that galaxy mergers can indeed trigger AGN activity. Furthermore, we see a clear increase of AGN activity with increasing redshift. At z=2 almost every galaxy contains an AGN, also galaxies without a merger. For this plot I used Box2/hr of the Magneticum simulations.

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