Physical process which shapes Cassiopeia A

Details Physical process which shapes Cassiopeia A Physical process which shapes Cassiopeia A

Jun 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987natur.327..395b&link_type=abstract

Nature (ISSN 0028-0836), vol. 327, June 4, 1987, p. 395-398.

Astronomy and Astrophysics

Astronomy

69

Gravitational Collapse, Nebulae, Radio Sources (Astronomy), Stellar Mass Ejection, Stellar Physics, Supernova Remnants, Magnetic Field Configurations, Stellar Models, Stellar Spectrophotometry, Temporal Distribution, X Ray Spectra

Scientific paper

The Cassiopeia A nebula provides a special opportunity for improving our understanding of how massive stars explode. Its relative proximity (a distance of 2.9 kpc) makes it possible to study the source's structure and time evolution in sufficient detail. The authors have exploited the rapid time evolution of the source through a series of three high-resolution radio images spanning four years. These images have allowed them to recognize the previously unsuspected process which is in fact dominant in shaping the object. Tenuous clumps of intermediate velocity stellar ejecta are now continuously puncturing, from within, the decelerated shell swept up by the diffuse ejecta which once had the highest velocity.

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