galaxy merger

Daniel Maschmann Emission lines with a double-peak (DP) shape, detected in the centre of <span class="search-hit mathjax">galaxies</span>, have been extensively used in the past to identify peculiar kinematics such as dual active galactic nuclei, outflows or <span class="search-hit mathjax">mergers</span>. From a large DP <span class="search-hit mathjax">galaxy</span> sample, a connection to minor <span class="search-hit mathjax">merger</span> <span class="search-hit mathjax">galaxies</span> with ongoing star formation was suggested. To gain a better understanding of different mechanisms creating a DP signature, we here explore synthetic SDSS spectroscopic observations computed from disc models and simulations.

Marko Mićić Dual AGN are important for understanding galaxy-merger-triggered fueling of black holes and hierarchical growth of structures. The least explored type of dual AGN are those associated with mergers of two dwarf galaxies. According to observations and cosmological simulations, dwarf galaxies are the most abundant type of galaxies in the early Universe and the galaxy merger rate is dominated by dwarfs. However, these mergers are generally too distant to be directly observed, and low-redshift dwarf-dwarf merger-related dual AGN are notoriously hard to find.