Using 3.4-$\mu$m Variability towards White Dwarfs as a Signpost of Remnant Planetary Systems

Joseph A. Guidry, J. J. Hermes, Kishalay De +3

Roughly 2% of white dwarfs harbor planetary debris disks detectable via infrared excesses, but only a few percent of these disks show a gaseous component, distinguished by their do…