Cassiopeia A (BW)

Cassiopeia A (Cas A) is the remnant of the supernova event which was quite possibly witnessed by Flamsteed in AD 1680. At that time the outer layers of a massive star were ejected with high velocity, sweeping up a shell of the surrounding interstellar material. This shell has now decelerated sufficiently so that the more slowly expanding material from deeper within the star is breaking through the shell from inside. The passage of this ejecta through the shell gives rise to conical extensions which leave crater-like structures in their wake.

Bandwidth synthesis used to improve spatial frequency content Details: Fully processed radiograph of the total intensity of CasA, deconvolved from the 4096 x 4096 pixel "dirty" image and beam via a Maximum Entropy Method ('VM') algorithm in 20 minutes of CPU time on a Cray X-MP.

Legacy Astronomical Images

NRAO/AUI/NSF does not hold full copyright for this image. Contact the archivist for details.

Legacy Astronomical Image

Cassiopeia A

P.E. Angerhofer, R. Braun, S.F. Gull, R.A. Perley, R.J. Tuffs

Very Large Array (VLA)

1983-00-00

continuum

C

6 cm

5.0 GHz

RA 23:21:13.000, Dec: 58:32:35.000 (B1950)

0.100000 x 0.100000 degrees

Contact the archivist for a high resolution tif of this image.

Galactic Sources Series

Supernova Remnants Unit