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Models of Type I X-ray Bursts from GS 1826-24: A Probe of rp-Process Hydrogen Burning
Alexander Heger, Andrew Cumming, Duncan K. Galloway +1
The X-ray burster GS 1826-24 shows extremely regular Type I X-ray bursts whose energetics and recurrence times agree well with thermonuclear ignition models. We present calculation…
The Metallicity Dependence of Wolf-Rayet Mass Loss
A. J. Onifer, A. Heger, J. Abdallah
We produce models of early WN, WC, and WO stars as a function of metallicity Z using an analytic CAK-type approach. At log(Z / Z_sun) >= -2 both WN and WC stars have the approximat…
On the Sensitivity of Massive Star Nucleosynthesis and Evolution to Solar Abundances and to Uncertainties in Helium Burning Reaction Rates
Clarisse Tur, Alexander Heger, Sam M. Austin
We explore the dependence of pre-supernova evolution and supernova nucleosynthesis yields on the uncertainties in helium burning reaction rates. Using the revised solar abundances…
Nucleosynthesis and Remnants in Massive Stars of Solar Metallicity
S. E. Woosley, A. Heger
Hans Bethe contributed in many ways to our understanding of the supernovae that happen in massive stars, but, to this day, a first principles model of how the explosion is energize…