CAS a: the Remnant of a Massive Supernova

Details CAS a: the Remnant of a Massive Supernova CAS a: the Remnant of a Massive Supernova

Jul 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991hst..prop.2417k&link_type=abstract

HST Proposal ID #2417

Physics

Hst Proposal Id #2417

Scientific paper

The remnants of recent supernovae provide the best opportunity to probe the evolution of massive stars and the synthesis of heavy elements. Among the remnants with fast moving, undiluted debris, the best known is Cas A. We have obtained extensive ground-based data on Cas A. The results provide valuable insights into the ages, composition, and kinematics of the remnant, but are imcomplete in tantalizing ways that HST can resolve. While we are confident Cas A results from the violent destruction of a massive star after advanced nuclear burning, essential features of the explosion physics, the excitation of the debris, the chemical composition of the ejecta, and the age, distance, and kinematics still elude our grasp. HST images will allow us to isolate the chemical inhomogeneities in the debris. The images will allow an unprecedented probe of the excitation mechanism, and will provide 10 times the angular resolution for proper motion studies to determine ages.

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