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The effect of massive binaries on stellar populations and supernova progenitors
John J. Eldridge, Robert G. Izzard, Christopher A. Tout
We compare our latest single and binary stellar model results from the Cambridge STARS code to several sets of observations. We examine four stellar population ratios, the number o…
Origin of the early-type R stars: a binary-merger solution to a century-old problem?
Robert G. Izzard, C. Simon Jeffery, John Lattanzio
The early-R stars are carbon-rich K-type giants. They are enhanced in C12, C13 and N14, have approximately solar oxygen, magnesium isotopes, s-process and iron abundances, have the…
The s-process in stellar population synthesis: a new approach to understanding AGB stars
A. A. Bonacic Marinovic, R. G. Izzard, M. Lugaro +1
Thermally pulsating asymptotic giant branch (AGB) stars are the main producers of slow neutron capture (s-) process elements, but there are still large uncertainties associated wit…
Reaction rate uncertainties and the operation of the NeNa and MgAl chains during HBB in intermediate-mass AGB stars
R. G. Izzard, M. Lugaro, A. I. Karakas +2
We test the effect of proton-capture reaction rate uncertainties on the abundances of the Ne, Na, Mg and Al isotopes processed by the NeNa and MgAl chains during hot bottom burning…
Carbon-enhanced metal-poor stars and thermohaline mixing
Richard J. Stancliffe, Evert Glebbeek, Robert G. Izzard +1
One possible scenario for the formation of carbon-enhanced metal-poor stars is the accretion of carbon-rich material from a binary companion which may no longer visible. It is gene…