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Bringing the Visible Universe into Focus with Robo-AO
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No cold dust within the supernova remnant Cassiopeia A.

Oliver Krause1, Stephan M Birkmann, George H Rieke

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Supernova remnants like Cassiopeia A do not produce large amounts of cold dust. Most dust previously attributed to this remnant actually originates from interstellar clouds, challenging supernova dust production theories.

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Area of Science:

  • Astronomy
  • Astrophysics
  • Cosmic Dust Studies

Background:

  • Previous observations suggested Type II supernovae, like Cassiopeia A, produce significant cold dust.
  • This dust was thought to explain the large quantities of dust observed in distant quasars within the early universe.

Purpose of the Study:

  • To re-evaluate the origin of cold dust attributed to the Cassiopeia A supernova remnant.
  • To determine if Type II supernovae are a significant source of cosmic dust.

Main Methods:

  • Far-infrared observations.
  • Molecular line observations.

Main Results:

  • The majority of submillimetre emission previously linked to Cassiopeia A originates from interstellar dust.
  • This dust is located in a foreground molecular cloud, not within the remnant itself.

Conclusions:

  • The Cassiopeia A remnant is not a significant source of cold dust.
  • The hypothesis that Type II supernovae produce copious amounts of dust is not supported by this case, challenging explanations for early universe dust.