Can planet formation resolve the dust budget crisis in high redshift
  galaxies?
  The process of planet formation offers a rich source of dust production via
grain growth in protostellar discs, and via grinding of larger bodies in debris
disc systems. Chemical evolution models, designed to follow the build up of
metals and dust in galaxies, do not currently account for planet formation. We
consider the possibility that the apparent under-prediction of dust mass in
high redshift galaxies by chemical evolution models could be in part, due to
these models neglecting this process, specifically due to their assumption that
a large fraction of the dust mass is removed from the interstellar medium
during star formation (so-called astration). By adding a planet formation phase
into galaxy chemical evolution, we demonstrate that the dust budget crisis can
be partially ameliorated by a factor of 1.3-1.5 only if a) circumstellar discs
prevent a large fraction of the dust mass entering the star during its birth,
and b) that dust mass is preferentially liberated via jets, winds and outflows
rather than accreted into planetary-mass bodies.
