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Estimates of Stellar Weak Interaction Rates for Nuclei in the Mass Range A=65-80
Jason Pruet, George M. Fuller
We estimate lepton capture and emission rates, as well as neutrino energy loss rates, for nuclei in the mass range A=65-80. These rates are calculated on a temperature/density grid…
Light Element Synthesis in High Entropy Relativistic Flows Associated with Gamma Ray Bursts
Jason Pruet, Shannon Guiles, George M. Fuller
We calculate and discuss the light element freeze-out nucleosynthesis in high entropy winds and fireballs for broad ranges of entropy-per-baryon, dynamic timescales characterizing…
Active-Sterile Neutrino Conversion: Consequences for the r-Process and Supernova Neutrino Detection
J. Fetter, G. C. McLaughlin, A. B. Balantekin +1
We examine active-sterile neutrino conversion in the late time post-core-bounce supernova environment. By including the effect of feedback on the Mikheyev-Smirnov-Wolfenstein (MSW)…
The Chemical Composition and Age of the Metal-Poor Halo Star BD +17^\circ 3248
John J. Cowan, Christopher Sneden, Scott Burles +8
We have combined new high-resolution spectra obtained with the Hubble Space Telescope (HST) and ground-based facilities to make a comprehensive new abundance analysis of the metal-…
Europium Isotopic Abundances in Very Metal-poor Stars
Christopher Sneden, John J. Cowan, James E. Lawler +3
Europium isotopic abundance fractions are reported for the very metal-poor, neutron-capture-rich giant stars CS 22892-052, HD 115444, and BD +17 3248. The abundance fractions, deri…