| Abell 2256 | |
|---|---|
| Observation data (EpochJ2000) | |
| Constellation(s) | Ursa Minor |
| Right ascension | 17h 03m 43.5s[1] |
| Declination | +78° 43′ 03″[1] |
| Richness class | 1[2] |
| Redshift | 0.058100 (17 418 km/s)[1] |
Abell 2256 is a rich nearbygalaxy cluster in theAbell catalogue that exhibits a population of ~ 100 – 200 kpc long steep spectrumsynchrotron filaments surrounding the cluster center[3] with significant evidence of merger activity deduced by the presence of two separate X-ray peaks in the X-ray surface brightness distribution.[4] One feature is aradio 'relic'. The other striking feature in the cluster is a long tail whose morphology suggests it is either a one-sided jet or a twin-tail structure. The bending of the tails takes place very near the galaxy core where one might expect little impact from the galaxy's motion through theintergalactic medium, unless the parent galaxy has undergone extreme stripping.[5]
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