Use this URL to cite or link to this record in EThOS: http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.598750
Title: Radiative feedback and massive star formation
Author: Edgar, R. G.
Awarding Body: University of Cambridge
Current Institution: University of Cambridge
Date of Award: 2003
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Abstract:
In this thesis, I develop a new method of treating the problem of radiative transfer around a forming massive star. This new method addresses the failings of grey radiative transfer through dusty gas, while avoiding the computational cost of frequency dependent transfer algorithms. My new algorithm is validated by comparison with previous frequency dependent calculations. This method is then applied to collapses of spherically symmetry gas clouds. I use this to show that there is no absolute radiative limit to stellar masses. Radiative feedback on the dusty inflow will cause a star to stop accreting, but this does not occur at any particular fixed mass. However, applying my new method to the Bondi-Hoyle geometry (likely to be found in a competitively accreting stellar cluster), I show that radiative feedback can still cause great difficulties in forming massive stars. The decreased central concentration, and presence of centrifugal support mean that radiative feedback can disrupt the Bondi-Hoyle flow. Although lack of time prevented me from exploring much parameter space, I am able to suggest the regions which might be fruitfully explored in the future.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID: uk.bl.ethos.598750  DOI: Not available
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