Investigating Annular Substructures in Oph IRS 63 and GSS 30 IRS 3 using Radiative Transfer Modelling
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Authors
Tobin, Shamus
Date
2024-09-27
Type
thesis
Language
eng
Keyword
Astronomy , Astrophysics , Physics , Star Formation , Planet Formation , Protostellar Disks , Class I
Alternative Title
Abstract
Protoplanetary disks have been commonly found to possess annular substructures in the form of rings, which have been linked to planet formation. However, recent studies have revealed that two younger protostellar disks, Oph IRS 63 and GSS 30 IRS 3, have similar annular rings, implying that these substructures can form much earlier in a disk's lifetime than previously expected. The physical nature of the rings found in these protostellar disks is unknown. If these rings result from local pressure traps that restrict the movement of dust grains, then the rings could represented locations of increased dust density and could subsequently also being regions of enhanced grain growth leading to planets. I investigate multi-wavelength continuum visibility observations taken by the Atacama Large Millimeter/submillimeter Array of Oph IRS 63 and GSS 30 IRS 3 using the radiative transfer modelling code, pdspy. I confirm the previous discovery of two rings found in Oph IRS 63 and one in GSS 30 IRS 3, and I also find that these rings are consistent with dust density enhancements. I also find evidence of radial drift and dust settling occurring in these disks through the examination of single wavelength models. These findings may have implications for the current understanding of how these rings form, how they might evolve as the disk ages, and how these could be locations for future planet formation. I discuss these implications and examine results from single wavelength modelling to compare the differences between the different dust grain populations.
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ProQuest PhD and Master's Theses International Dissemination Agreement
Intellectual Property Guidelines at Queen's University
Copying and Preserving Your Thesis
This publication is made available by the authority of the copyright owner solely for the purpose of private study and research and may not be copied or reproduced except as permitted by the copyright laws without written authority from the copyright owner.
Attribution-ShareAlike 4.0 International