The Herschel Cold Debris Disks: Confusion with the Extragalactic
  Background at 160 mu
  The Herschel "DUst around NEarby Stars (DUNES)" survey has found a number of
debris disk candidates that are apparently very cold, with temperatures near
22K. It has proven difficult to fit their spectral energy distributions with
conventional models for debris disks. Given this issue we carefully examine the
alternative explanation, that the detections arise from confusion with IR
cirrus and/or background galaxies that are not physically associated with the
foreground star. We find that such an explanation is consistent with all of
these detections.
