<> "The repository administrator has not yet configured an RDF license."^^ . <> . . "Modelling supermassive black hole spins and the metallicity evolution of merging galaxies in a cosmological context"^^ . "Galaxy mergers are a key process in the current paradigm of hierarchical galaxy formation. \r\nThey are responsible for many galaxy transformations. For instance, they can drive\r\nchanges in galaxy morphology and colour, boost the star formation activity and trigger\r\nstrong inflows of pristine gas that dilute the central gas metallicity and feed the central\r\nsupermassive black hole. To which extent and how galaxy mergers affect some of the\r\ngalaxy properties are still open questions. In the first part of this thesis, we use simulations\r\nand observations to study the processes of merger-induced gas metallicity dilution and\r\nstar formation enhancement. We find that merging and post-merger galaxies constitute a\r\nprominent outlier population in the fundamental metallicity relation, a relation that links\r\nthe galaxy stellar mass with the star formation rate and the gas metallicity. In the second\r\npart of this thesis, we present a sub-grid model of supermassive black hole spin evolution in\r\ncosmological simulations of galaxy formation. We find that the accretion discs of low-mass\r\nblack holes accrete mass in a coherent fashion, resulting in high spin values. On the other\r\nhand, high-mass black holes have lower spins because gas accretion is either chaotic or\r\ncompletely suppressed, in which case black hole binary coalescence resulting from galaxy\r\nmergers is the only relevant evolution channel. Finally, we test a hypothesis in which the\r\nblack hole energy feedback transitions from a thermal mode to a kinetic mode at the onset\r\nof self-gravity fragmentation in the accretion disc, and is thus coupled to the spin evolution\r\nof the black hole. We find that our conjecture reproduces the galaxy colour bimodality and\r\nthe colour-morphology relation."^^ . "2019" . . . . . . . "Sebastian"^^ . "Bustamante Jaramillo"^^ . "Sebastian Bustamante Jaramillo"^^ . . . . . . "Modelling supermassive black hole spins and the metallicity evolution of merging galaxies in a cosmological context (PDF)"^^ . . . "Dissertation_Sebastian_Bustamante.pdf"^^ . . . "Modelling supermassive black hole spins and the metallicity evolution of merging galaxies in a cosmological context (Other)"^^ . . . . . . "indexcodes.txt"^^ . . "HTML Summary of #26906 \n\nModelling supermassive black hole spins and the metallicity evolution of merging galaxies in a cosmological context\n\n" . "text/html" . . . "520 Astronomie"@de . "520 Astronomy and allied sciences"@en . . . "530 Physik"@de . "530 Physics"@en . .