Two long period radio transients are detached white dwarf-M dwarf binaries with matching periods, massive cool crystallized white dwarfs, low inclinations, and an estimated population of 100-2000 such systems within 2 kpc.
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Model atmosphere analysis of 25,642 cool white dwarfs from DESI DR1 shows no mass discrepancy for cool DAs, increasing H/He ratios at low temperatures, and rising He-atmosphere fraction below 10,000 K from convective mixing.
citing papers explorer
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White dwarf + M dwarf Detached Binaries in Long Period Radio Transients: Observed Binary Parameters, Evolution, and Population Constraints
Two long period radio transients are detached white dwarf-M dwarf binaries with matching periods, massive cool crystallized white dwarfs, low inclinations, and an estimated population of 100-2000 such systems within 2 kpc.
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A Detailed Model Atmosphere Analysis of Cool White Dwarfs in DESI DR1
Model atmosphere analysis of 25,642 cool white dwarfs from DESI DR1 shows no mass discrepancy for cool DAs, increasing H/He ratios at low temperatures, and rising He-atmosphere fraction below 10,000 K from convective mixing.