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.
Investigator(s): P.E. Angerhofer, R. Braun, S.F. Gull, R.A. Perley, and R.J. Tuffs
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Telescope
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VLA
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Date of Observation
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1983-00-00
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Type of Observation
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Continuum Observations
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Band
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C
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Wavelength
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6 cm
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Frequency
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5.0 GHz
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Center of Image
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RA: 23:21:13.00, Dec: 58:32:35.00 (B1950)
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Field of View
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0.1000 x 0.1000 degrees
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Technical Caption
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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.
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- Astronomical database entries for Cas A
- Query for more Cas A data
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