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Abell 2163
Galaxy cluster located in the Ophiuchus constellation
Galaxy cluster located in the Ophiuchus constellation
| Field | Value |
|---|---|
| name | Abell 2163 |
| image | Cosmic fireflies.jpg |
| caption | Abell 2163 taken by Hubble Space Telescope. |
| credit | ESA/Hubble & NASA |
| epoch | J2000 |
| ra | |
| dec | |
| constellation | Ophiuchus |
| richness | 2{{cite journal |
| last1 | Abell |
| first1 | George O. |
| authorlink1 | George O. Abell |
| last2 | Corwin |
| first2 | Harold G. Jr. |
| authorlink2 | Harold G. Corwin |
| last3 | Olowin |
| first3 | Ronald P. |
| authorlink3 | Ronald P. Olowin |
| date | May 1989 |
| title | A catalog of rich clusters of galaxies |
| journal | Astrophysical Journal Supplement Series |
| volume | 70 |
| issue | May 1989 |
| pages | 1–138 |
| format | |
| issn | 0067-0049 |
| bibcode | 1989ApJS...70....1A |
| doi | 10.1086/191333 |
| access-date | March 13, 2012 |
| url | http://articles.adsabs.harvard.edu/cgi-bin/nph-iarticle_query?bibcode=1989ApJS...70....1A&page_ind=0&epage_ind=137&type=PRINTER&data_type=PDF_HIGH&email=&emailsize=500&emailsplit=YES&send=GET&verified=YES |
| doi-access | free |
| redshift | 0.2030 |
| distance | 828 Mpc {{cite web |
| url | http://ned.ipac.caltech.edu/cgi-bin/nph-objsearch?objname=Abell+2163&extend=no |
| title | NED results for object ABELL 2163 |
| publisher | NASA/IPAC Extragalactic Database (NED) |
| access-date | March 17, 2012 |
| temperature | 11.5–14.6 keV |
| mass | 4.6 × 1015 |
| luminosity | 6 × 1045erg/s |
| flux | 1.4 erg s−1 cm−2 (0.5–2 keV) |
| access-date = March 13, 2012 | doi-access = free | access-date = March 17, 2012 Abell 2163 is one of the richest and most distant of the clusters of galaxies found in the Abell catalogue. Its abell richness class is 2 and position is at a redshift z=0.2. Data from Chandra X-ray Observatory have shown that it is the hottest galaxy cluster in the Abell catalogue. It is also a merging cluster.
The galaxy density and mass distribution in the central region of this cluster have also been determined by weak gravitational lensing. These analyses show very similar mass and galaxy distributions, with two coincident maxima and a flat shape elongated in the east-west direction, but the weak lensing signal is surprisingly faint in comparison to what could be expected from the cluster X-ray properties. However, these detailed studies are limited to the inner 8’×8’ region of the cluster, and do not include the peripheral clumps such as A2163-B. La Barbera et al. (2004) estimated the photometric redshifts of galaxies in A2163-B, showing that this structure lies at the typical redshift of the main cluster (z = 0.215 ± 0.0125).
There is also an extremely bright and large radio halo present in the cluster, and is one of the brightest known clusters.
References
References
- "Cosmic fireflies".
- ''[https://arxiv.org/abs/0712.2715 A2163: Merger events in the hottest Abell galaxy cluster I. Dynamical analysis from optical data]'' – S.Maurogordato, A. Cappi, C. Ferrari, C. Benoist, G. Mars, G. Soucail, M. Arnaud, G.W. Pratt, H. Bourdin, J.-L. Sauvageot.
- ''[https://arxiv.org/abs/astro-ph/0104451 The Giant Radio Halo in Abell 2163]'' – L. Feretti, R. Fusco-Femiano, G. Giovannini, F. Govoni.
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