White Dwarf Donors in Ultracompact Binaries: The Stellar Structure of Finite‐Entropy Objects
White Dwarf Donors in Ultracompact Binaries: The Stellar Structure of Finite‐Entropy Objects
We discuss the mass-radius (M-R) relations for low-mass (M<0.1 Msun) white dwarfs (WDs) of arbitrary degeneracy and evolved (He, C, O) composition. We do so with both a simple analytical model and models calculated by integration of hydrostatic balance using a modern equation of state valid for fully ionized plasmas. …