Global ETD Search
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Showing 1 to 8 of 8 for “"stellar feedback"”.
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Formation of the first galaxies under stellar feedback
The stellar feedback is a crucial ingredient for modeling galaxy formation, especially for the first galaxies, which are susceptible to stellar feedback due to their shallow potential wells. In this thesis I have investigated the impact of stellar feedback from the first generation of metal-free …
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Modelling star formation and stellar feedback in numerical simulations of galaxy formation
… the formation of a turbulent, multiphase interstellar medium (ISM), the efficiency with which molecular gas is able to collapse into cores and ultimately stars, and the subsequent interaction of those stars with the gas through ionizing radiation, winds and supernova (SN) explosions. Given the …
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Comparing Simulations and Observations of Galaxy Evolution: Methods for Constraining the Nature of Stellar Feedback
… this sort tend to fail is in the prescription of stellar feedback, the process by which nascent stars return material and energy to their immediate environments. Careful treatment of this interaction in subgrid models, so-called because they operate on scales below the resolution of the …
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The Impact of AGN Feedback on Galaxy Formation in Gas-Rich Mergers at z∼1-2
… with a particular focus on the effect of feedback from active galactic nuclei (AGNs). In total, 16 galaxy mergers at redshifts z = 1 and z = 2 were modeled using the simulation codes KETJU and GADGET-3. The simulations were performed on the supercomputer Mahti located at the Finnish IT …
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Dwarf Galaxies in a Cosmological Context: A Testbench for Galaxy Modeling
… the roles of reionization and supernova feedback in determining the star-formation histories of low-mass dwarf galaxies and to explore the effect of differing numerical implementations of supernova feedback on galactic enrichment and winds. Our models include a wide range of physical …
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The stellar halos of Milky Way type galaxies in the EAGLE simulations
The stellar halo component of a galaxy contains a wealth of valuable information on the host galaxy's formation history. As the diffuse outskirts of galaxies which have been built up through hierarchical assembly, their content and structure is directly tied to the material that was accreted onto …
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A COMPARISON OF STAR FORMATION WITHIN THE GALACTIC CENTRE AND GALACTIC DISC
… to be untouched by the disruptive effects of stellar feedback, such that the natal conditions of the gas – e.g. kinematics and chemistry – are not destroyed. Quiescent regions that are expected to form low-mass stars have been well studied over the past few decades, and the general process of …
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Cosmological Simulations of Galactic Disc Assembly
… $z=0$ and find that four of the simulations, the stellar disc appears to undergo continual/secular heating. Two other simulations suggest a “saturation” in the heating profile for young stars in the disc. None of the simulations have thin discs as old as that of the Milky Way. We also analyse the …