<> "The repository administrator has not yet configured an RDF license."^^ . <> . . "Infalling clouds onto supermassive black hole binaries"^^ . "There is compelling evidence that most -if not all- galaxies harbour a supermassive black hole at their nucleus, hence binaries of these massive objects are an inevitable product of the hierarchical evolution of structures in the universe, and represent an important but thus-far elusive piece of the galaxy formation puzzle.\r\n\r\nGas accretion is thought to be important for the dynamical evolution of supermassive black hole binaries (SMBHBs), as well as in producing luminous emission that can be used to infer their properties, although the mechanisms that drive material to the galactic nuclei are poorly constrained. One plausible source of the gaseous fuel is cold clumps of gas formed due to turbulence and gravitational instabilities in the interstellar medium that later fall towards and interact with the binary.\r\nIn this context, I present a suite of smoothed-particle-hydrodynamical models to study the evolution of turbulent gas clouds as they infall towards equal-mass, circular SMBHBs. \r\n\r\nI use a set of high-resolution simulations of separate clouds infalling onto binaries to study the formation of gaseous structures and their dynamics, as well as the feeding rate onto the SMBHB, depending on different orbital configurations. I show that some of the variabilities can have implications in the observability of these systems.\r\n\r\nAdditionally, exploiting similar single cloud models, I study the dynamical evolution of the binary orbit during the interaction with different clouds and show that it is dominated by the exchange of angular momentum through gas capture and accretion. Building on these results, I construct a simple model for the long-term evolution of a SMBHB interacting with several incoming clouds, which are randomly drawn from reasonable populations with different levels of anisotropy. In this scenario, the binary evolves down to the gravitational emission regime within a few hundred million years.\r\n\r\nI finally extend the simulations to a binary interacting with a sequence of incoherent clouds to investigate the secular effects of the left-over gas on the SMBHB orbital evolution, previously unresolved with the single cloud models. After a sequence of ten events, I observe that these secular effects further increase the efficiency of the incoherent clouds with respect to a scenario that only considers the prompt accretion phase.\r\n\r\nAll these results suggest that sub-parsec SMBHBs embedded in gas-rich and turbulent environments efficiently evolve towards coalescence during the interaction with individual gas pockets, providing a possible solution to the \"final parsec problem\"."^^ . "2017" . . . . . . . "Felipe"^^ . "Garrido Goicovic"^^ . "Felipe Garrido Goicovic"^^ . . . . . . "Infalling clouds onto supermassive black hole binaries (Other)"^^ . . . . . . "lightbox.jpg"^^ . . . "Infalling clouds onto supermassive black hole binaries (Other)"^^ . . . . . . "preview.jpg"^^ . . . "Infalling clouds onto supermassive black hole binaries (Other)"^^ . . . . . . "medium.jpg"^^ . . . "Infalling clouds onto supermassive black hole binaries (Other)"^^ . . . . . . "small.jpg"^^ . . . "Infalling clouds onto supermassive black hole binaries (PDF)"^^ . . . "Thesis_Goicovic_HD.pdf"^^ . . . "Infalling clouds onto supermassive black hole binaries (Other)"^^ . . . . . . "indexcodes.txt"^^ . . "HTML Summary of #23481 \n\nInfalling clouds onto supermassive black hole binaries\n\n" . "text/html" . . . "520 Astronomie"@de . "520 Astronomy and allied sciences"@en . .