Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 7 of 7 for “"Photoevaporation"”.
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The Importance of Photoevaporation in the Evolution of Protoplanetary Discs
… in the first few million years of their life. Photoevaporation, whereby high-energy radiation from the central star heats disc material causing it to flow away in a wind, is one process thought to contribute to their ultimate dispersal. Previous studies have failed to reach a consensus on the …
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ASSESSING THE ROLE OF EXTERNAL PHOTOEVAPORATION OF PROTOPLANETARY DISCS IN NEARBY STAR-FORMING REGIONS
… outside-in disc depletion throughout external photoevaporation. In this thesis, I investigate how external photoevaporation shapes disc dynamics across a broad range of far-ultraviolet (FUV) radiation fields, focusing on nearby star-forming regions within 500 pc. Using numerical disc evolution …
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Protoplanetary disc evolution and dispersal
… models which combine viscous evolution with photoevaporation, as previous work suggests that photoevaporation can reproduce the observed disc evolution and dispersal time-scales. The main question this thesis attempts to address is: Can photoevaporation provide a dominant dispersal mechanism …
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The influence of stellar birth environment on protoplanetary disc dispersal
… truncation by star-disc encounters and external photoevaporation due to irradiation by massive stars. I make the distinction between encounters that occur in multiple systems and those that occur between individual stars (type I and type II encounters). I model the specific case of HV and DO Tau, …
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The impact of environment on the evolution of protoplanetary discs
… discs are star-disc encounters, and external photoevaporation. In this thesis, I show that sub-mm observations of the RW Aur system are well described by an ongoing tidal encounter between the circumprimary disc and the secondary star. This makes RW Aur the only system known to date to be …
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Reducing the Compositional and Structural Degeneracy of Planetary Interiors
… By combining planetary interior modeling with photoevaporation modeling, I investigate into one of the hypotheses – the fossil-compressed hypothesis – for the origin of high-density planets. My models revealed that most high-density planets are highly improbable to be fossil-compressed cores, …
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The impact of star cluster environments on planet formation
… of mass-loss in discs due to external photoevaporation severely overestimate the detrimental effects of EUV and FUV radiation. By calculating the UV background field in star-forming regions, I find that the initial spatial distribution of stars greatly affects the amount of UV radiation …