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Structure of Convective-Reactive Zone in a Supernova Progenitor
M. Mocak, C. Meakin, F. Rizzuti +5
Convective-reactive events are phases of stellar evolution where turbulent mixing and nuclear burning directly compete, since their timescales become similar within convection zone…
Structural and Nucleosynthetic Evolution of Metal-poor & Metal-free Low- and Intermediate-Mass Stars
Simon Wattana Campbell
In this PhD thesis we investigate stellar evolution and nucleosynthesis in the low- and extremely-low metallicity regime - including models of stars with a pure Big Bang compositio…
Asteroseismology sheds light on the origin of carbon-deficient red giants: likely merger products and linked to the Li-rich giants
Sunayana Maben, Simon W. Campbell, Yerra Bharat Kumar +2
Carbon-deficient red giants (CDGs) are a peculiar class of stars that have eluded explanation for decades. We aim to better characterise CDGs by using asteroseismology (Kepler, TES…
First Asteroseismic Analysis of the Globular Cluster M80: Multiple Populations and Stellar Mass Loss
Madeline Howell, Simon W. Campbell, Dennis Stello +1
Asteroseismology provides a new avenue for accurately measuring the masses of evolved globular cluster (GC) stars through the detection of their solar-like oscillations. We present…
Nucleosynthetic yields of intermediate-mass primordial to extremely metal-poor stars
P. Gil-Pons, C. L. Doherty, S. W. Campbell +1
Abridged. We aim to better characterise the evolution and fates, and determine updated nucleosynthetic yields of intermediate-mass stars between primordial and EMP metallicity (Z=1…
Integrated Mass Loss of Evolved Stars in M4 using Asteroseismology
Madeline Howell, Simon W. Campbell, Dennis Stello +1
Mass loss remains a major uncertainty in stellar modelling. In low-mass stars, mass loss is most significant on the red giant branch (RGB), and will impact the star's evolutionary…