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dc.contributor.advisorBonnell, Ian Alexander
dc.contributor.authorSmilgys, Romas
dc.coverage.spatialxxiii, 135, [6] p.en_US
dc.description.abstractStar and stellar cluster formation in spiral galaxies is one of the biggest questions of astrophysics. In this thesis, I study how star formation, and the formation of stellar clusters, proceeds using SPH simulations. These simulations model a region of 400 pc and 10⁷ solar masses. Star formation is modelled through the use of sink particles which represent small groups of stars. Star formation occurs in high density regions, created by galactic spiral arm passage. The spiral shock compresses the gas and generates high density regions. Once these regions attain sufficiently high density, self-gravity becomes dominant and drives collapse and star formation. The regions fragment hierarchically, forming local small groups of stars. These fall together to form clusters, which grow through subsequent mergers and large scale gas infall. As the individual star formation occurs over large distances before forming a stellar cluster, this process can result in significant age spreads of 1-2 Myrs. One protocluster is found to fail to merge due to the large scale tidal forces from the nearby regions, and instead expands forming a dispersed population of young stars such as an OB association.en_US
dc.publisherUniversity of St Andrews
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 International*
dc.subjectStar formationen_US
dc.subjectFormation of stellar clustersen_US
dc.subjectOB associationsen_US
dc.subjectSPH simulationsen_US
dc.subjectMolecular cloudsen_US
dc.subjectGalactic spiral armsen_US
dc.subject.lcshSpiral galaxiesen
dc.titleFormation of stars and stellar clusters in galactic environmenten_US
dc.contributor.sponsorEuropean Research Council (ERC)en_US
dc.type.qualificationnamePhD Doctor of Philosophyen_US
dc.publisher.institutionThe University of St Andrewsen_US

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    Except where otherwise noted within the work, this item's licence for re-use is described as Attribution-NonCommercial-NoDerivatives 4.0 International