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Modules for Experiments in Stellar Astrophysics (MESA): Time-Dependent Convection, Energy Conservation, Automatic Differentiation, and Infrastructure
Adam S. Jermyn, Evan B. Bauer, Josiah Schwab +19
We update the capabilities of the open-knowledge software instrument Modules for Experiments in Stellar Astrophysics (MESA). The new auto_diff module implements automatic different…
Some Thoughts on the Convective Urca Process
Josiah Schwab
I have repeatedly grappled with the question of how the convective Urca process affects stellar evolution, in particular during the high-density convective carbon burning that can…
Pre-Explosion Properties of Helium Star Donors to Thermonuclear Supernovae
Tin Long Sunny Wong, Josiah Schwab, Ylva Götberg
Helium star - carbon-oxygen white dwarf (CO WD) binaries are potential single-degenerate progenitor systems of thermonuclear supernovae. Revisiting a set of binary evolution calcul…
The final fates of close hot subdwarf - white dwarf binaries: mergers involving He/C/O white dwarfs and the formation of unusual giant stars with C/O-dominated envelopes
Josiah Schwab, Evan B. Bauer
Recently, a class of Roche-lobe-filling binary systems consisting of hot subdwarf stars and white dwarfs with sub-hour periods has been discovered. At present, the hot subdwarf is…
A highly magnetised and rapidly rotating white dwarf as small as the Moon
Ilaria Caiazzo, Kevin B. Burdge, James Fuller +15
White dwarfs represent the last stage of evolution of stars with mass less than about eight times that of the Sun and, like other stars, are often found in binaries. If the orbital…
Cooling Models for the Most Massive White Dwarfs
Josiah Schwab
We present a set of ultramassive white dwarf models, focused on masses above . Given the uncertainties about the formation and compositions of such objects, we constr…