Cassiopeia A (BW)

https://www.nrao.edu/archives/plugins/Dropbox/files/CasA-BW_VR09B_hi.jpg

Description

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.

Creator

Legacy Astronomical Images

Rights

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

Type

Legacy Astronomical Image

Object Name

Cassiopeia A

Investigators

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

Telescope

Very Large Array (VLA)

Observation Date

1983-00-00

Type of Observation

continuum

Band

C

Wavelength

6 cm

Frequency

5.0 GHz

Center of Image

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

Field of View

0.100000 x 0.100000 degrees

Notes

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

Series

Galactic Sources Series

Unit

Supernova Remnants Unit

Citation

Legacy Astronomical Images, “Cassiopeia A (BW),” NRAO Archives, accessed December 3, 2021, https://www.nrao.edu/archives/items/show/33515.