Absence of Small Dust Cloud Particles Transiting the White Dwarf J0328-1219

The transiting dust clouds that orbit the white dwarf J0328-1219 are devoid of small particles (< 0.1 micron). Observations show that fade amount doesn't depend on wavelength. This finding resembles a similar observation for white dwarf WD 1145+017, but the explanations for an absence of small particles in the two white dwarf systems may differ due to their different distances from the star.