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The r-process and neutrino-heated supernova ejecta
As a neutron star is formed by the collapse of the iron core of a massive star, its Kelvin-Helmholtz evolution is characterized by the release of gravitational binding energy as neutrinos. The…
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Neutron Capture Elements in s-Process-Rich, Very Metal-Poor Stars
We report abundance estimates for neutron capture elements, including lead (Pb), and nucleosynthesis models for their origin, in two carbon-rich, very metal-poor stars, LP 625-44 and LP 706-7. These…
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The r-Process in Neutrino-driven Winds from Nascent, “Compact” Neutron Stars of Core-Collapse Supernovae
We present calculations of r-process nucleosynthesis in neutrino-driven winds from the nascent neutron stars of core-collapse supernovae. A full dynamical reaction network for both the α-rich…
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Observation of interstellar lithium in the low-metallicity Small Magellanic Cloud
TLDR
Observations of interstellar 7Li in the low-metallicity gas of the Small Magellanic Cloud, a nearby galaxy with a quarter the Sun’s metallicity, are reported, showing an alternative constraint on the primordial abundance and cosmic evolution of lithium that is not susceptible to the in situ modifications that may affect stellar atmospheres.
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Mass-Radius Relation for Magnetic White Dwarfs
Recently, several white dwarfs with very strong surface magnetic fields have been observed. In this paper we explore the possibility that such stars could have sufficiently strong internal fields to…
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Flash-Driven Convective Mixing in Low-Mass, Metal-deficient Asymptotic Giant Branch Stars: A New Paradigm for Lithium Enrichment and a Possible s-Process
We have calculated models for low-mass, metal-deficient ([Fe/H] = -2.7) stars from the zero-age main sequence through the thermally pulsing asymptotic giant branch (TP-AGB) phase. We confirm that the…
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Inhomogenous Chemical Evolution of the Galactic Disk
We present analytical models for inhomogeneous chemical evolution (ICE) of systems in which the star formation history resembles a series of bursts, localized in space and/or time, with intermittent…
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r-Process in Prompt Supernova Explosions Revisited
We reanalyze r-process nucleosynthesis in the neutron-rich ejecta from a prompt supernova explosion of a low-mass (11 M☉) progenitor. Although it has not yet been established that a prompt explosion…
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Relativistic Numerical Hydrodynamics
Preface 1. Introduction 2. Special relativistic hydrodynamics 3. General relativistic hydrodynamics 4. Cosmological hydrodynamics 5. Stellar collapse and supernovae 6. Axially symmetric relativistic…
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Probing the early universe: A Review of primordial nucleosynthesis beyond the standard Big Bang
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