4 papers
Three-component Phase Separation for Ultramassive White Dwarf Models
Matias Castro-Tapia, Andrew Cumming
We investigate phase separation in oxygen-neon (O/Ne) ultramassive white dwarfs (UMWDs). Current stellar evolution codes, such as MESA, only account for s…
Magnetic field evolution for crystallization-driven dynamos in C/O white dwarfs
Matias Castro-Tapia, Shu Zhang, Andrew Cumming
We investigate the evolution of magnetic fields generated by the crystallization-driven dynamo in carbon-oxygen white dwarfs (WDs) with masses . We use sca…
Hot Spot Offset Variability from Magnetohydrodynamical Thermoresistive Instability in Hot Jupiters
Raphaël Hardy, Paul Charbonneau, Andrew Cumming
Hot Jupiter atmospheres are possibly subject to a thermoresistive instability. Such an instability may develop as the ohmic heating increases the electrical conductivity in a posit…
Fast and Slow Crystallization-driven Convection in White Dwarfs
Matias Castro-Tapia, Andrew Cumming, J. R. Fuentes
We investigate crystallization-driven convection in carbon-oxygen white dwarfs. We present a version of the mixing length theory (MLT) that self-consistently includes the effects o…