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Abell 2256

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Abell 2256
Abell 2256 seen by DESI Legacy Surveys DR11
Observation data (Epoch J2000)
ConstellationUrsa Minor
Right ascension17h 03m 43.5s[1]
Declination+78° 43′ 03″[1]
Richness class1[2]
Velocity dispersion3.105 km/s
Redshift0.058100 (17 418 km/s)[1]
Distance237.250 ± 13.066 MPC
Other designations
Abell 2256; ABELL 2256; UGCl 411; ZwCl 1653.9+7856; SCL 168 NED02[3]

Abell 2256 is a rich, X-ray Luminous nearby galaxy cluster in the Abell catalogue[4] that exhibits a population of ~ 100 – 200 kpc long steep spectrum synchrotron filaments surrounding the cluster center[5] with significant evidence of merger activity deduced by the presence of two separate X-ray peaks in the X-ray surface brightness distribution.[6] 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.[7]

Abell 2256 is located in the Supercluster 168 or SCL 168 that consists of 5 members, which are Abell 2248, Abell 2271, Abell 2296, Abell 2309.[8] The brightest member of Abell 2256 (UGC 10726) is an elliptical galaxy, has a diameter (kpc) of 87.99.[9]

See also

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References

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  1. ^ a b c "NED results for object ABELL 2256". NASA/IPAC Extragalactic Database (NED). Retrieved March 10, 2015.
  2. ^ 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. Bibcode:1989ApJS...70....1A. doi:10.1086/191333. ISSN 0067-0049.
  3. ^ "NED results for Abell 2256". NASA/IPAC Extragalactic Database (NED). California Institute of Technology. Retrieved 2026-08-22.
  4. ^ Abell, G. O. (1958). "The Distribution of Rich Clusters of Galaxies". The Astrophysical Journal Supplement Series. 3: 211. Bibcode:1958ApJS....3..211A. doi:10.1086/190036.
  5. ^ 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].
  6. ^ DEEP 1.4 GHz VERY LARGE ARRAY OBSERVATIONS OF THE RADIO HALO AND RELIC IN ABELL 2256
  7. ^ 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. arXiv:1408.5931. Bibcode:2014ApJ...794...24O. doi:10.1088/0004-637X/794/1/24. S2CID 117010036.
  8. ^ Einasto, M.; Einasto, J.; Tago, E.; Müller, V.; Andernach, H. (2001). "Optical and X-Ray Clusters as Tracers of the Supercluster-Void Network. I. Superclusters of Abell and X-Ray Clusters". The Astronomical Journal. 122 (5): 2222–2242. arXiv:astro-ph/0012536. Bibcode:2001AJ....122.2222E. doi:10.1086/323707.
  9. ^ Fasano, G.; Bettoni, D.; Ascaso, B.; Tormen, G.; Poggianti, B. M.; Valentinuzzi, T.; D'Onofrio, M.; Fritz, J.; Moretti, A.; Omizzolo, A.; Cava, A.; Moles, M.; Dressler, A.; Couch, W. J.; Kjaergaard, P.; Varela, J. (2010). "The shapes of BCGs and normal ellipticals in nearby clusters". Monthly Notices of the Royal Astronomical Society. 404 (3): 1490–1504. arXiv:1001.2701. Bibcode:2010MNRAS.404.1490F. doi:10.1111/j.1365-2966.2010.16361.x.


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