The ice composition in the disk around V883 Ori revealed by its stellar
  outburst
  Complex organic molecules (COMs), which are the seeds of prebiotic material
and precursors of amino acids and sugars, form in the icy mantles of
circumstellar dust grains but cannot be detected remotely unless they are
heated and released to the gas phase. Around solar-mass stars, water and COMs
only sublimate in the inner few au of the disk, making them extremely difficult
to spatially resolve and study. Sudden increases in the luminosity of the
central star will quickly expand the sublimation front (so-called snow line) to
larger radii, as seen previously in the FU Ori outburst of the young star V883
Ori. In this paper, we take advantage of the rapid increase in disk temperature
of V883 Ori to detect and analyze five different COMs, methanol, acetone,
acetonitrile, acetaldehyde, and methyl formate, in spatially-resolved
submillimeter observations. The COMs abundances in V883 Ori is in reasonable
agreement with cometary values. This result suggests that outbursting young
stars can provide a special opportunity to study the ice composition of
material directly related to planet formation.
