Astronomy:Abell 2256
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Short description: Galaxy cluster in the constellation Ursa Minor
| Abell 2256 | |
|---|---|
| Observation data (Epoch J2000) | |
| 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 nearby galaxy cluster in the Abell catalogue that exhibits a population of ~ 100 – 200 kpc long steep spectrum synchrotron 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 a radio '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 the intergalactic medium, unless the parent galaxy has undergone extreme stripping.[5]
See also
References
- ↑ 1.0 1.1 1.2 "NED results for object ABELL 2256". NASA/IPAC Extragalactic Database (NED). http://ned.ipac.caltech.edu/cgi-bin/nph-objsearch?objname=Abell+2256&extend=no.
- ↑ Abell, George O.; Corwin, Harold G. Jr.; Olowin, Ronald P. (May 1989). "A catalog of rich clusters of galaxies". Astrophysical Journal Supplement Series 70 (May 1989): 1–138. doi:10.1086/191333. ISSN 0067-0049. Bibcode: 1989ApJS...70....1A.
- ↑ Clarke, Tracy E; Enßlin, Torsten; Finoguenov, Alexis; Intema, Huib; Pfrommer, Christoph; Reinout van Weeren; Röttgering, Huub; Oonk, Raymond (2011). "The Curious Case of Abell 2256". arXiv:1102.5539v1 [astro-ph.CO].
- ↑ DEEP 1.4 GHz VERY LARGE ARRAY OBSERVATIONS OF THE RADIO HALO AND RELIC IN ABELL 2256
- ↑ Clarke, Tracy E; Enßlin, Torsten; Finoguenov, Alexis; Intema, Huib; Pfrommer, Christoph; Reinout van Weeren; Röttgering, Huub; Oonk, Raymond (2014). "Wideband VLA Observations of Abell 2256 I: Continuum, Rotation Measure and Spectral Imaging". The Astrophysical Journal 794 (1): 24. doi:10.1088/0004-637X/794/1/24. Bibcode: 2014ApJ...794...24O.
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