Abell 665

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Abell 665
Abell 665 (Chandra).jpg
Chandra X-ray Observatory X-ray image of Abell 665
Observation data (Epoch J2000)
Constellation(s) Ursa Major
Right ascension 08h 30m 45.2s [1]
Declination +65° 52′ 55″ [1]
Brightest member2MASX J08305736+6550299 [2] [3]
Richness class 5 [4]
Bautz–Morgan classification III [1]
Velocity dispersion 1 390+120
−110 km/s [2]
Redshift 0.1819 [1]
Distance 720  Mpc (2,348  Mly) h−1
0.73 [1]
ICM temperature 7.7 ± 0.4 keV (r ≲ 100 h−1
0.73 kpc) [5]
Binding mass ~1015h−1
0.75 [2]   M☉
X-ray flux (11.8 ± 15.6%)×10−12 erg s−1 cm−2 (0.1–2.4 keV) [1]
See also: Galaxy group, Galaxy cluster, List of galaxy groups and clusters

Abell 665 is a galaxy cluster in the Abell catalogue in the constellation Ursa Major. It is also known as the only cluster in his 1989 catalog to receive Abell's highest richness class of 5. This means that it contains at least 300 galaxies in the magnitude range of m3 to m3+2, where m3 is the magnitude of the third-brightest member of the cluster. The clusters in all other richness classes contain less than 300 such galaxies. Abell 665's combination of high brightness and large distance, made it an excellent candidate along with 37 other clusters to help determine the Hubble constant using the Sunyaev–Zel'dovich effect in 2006. [5]

Contents

Member velocity, cluster velocity dispersion, and X-ray data suggest that Abell 665 is composed of two similar-mass clusters which are at or very close to core crossing, give or take ≲ 0.5 gigayears. [2]

See also

Related Research Articles

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<span class="mw-page-title-main">Abell 383</span> Galaxy cluster in the constellation Eridanus

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<span class="mw-page-title-main">Abell 1413</span> Galaxy cluster in constellation Coma Berenices

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<span class="mw-page-title-main">Abell 2390</span> Galaxy cluster in the constellation Pegasus

Abell 2390 is a galaxy cluster in the Abell catalogue.

Abell 2152 is a bimodal galaxy cluster and one of three clusters comprising the Hercules Supercluster. It contains 3 BCGs; the S0 lenticular UGC 10204, the pair UGC 10187, and the SA0 unbarred lenticular CGCG 108-083. In total there are 41 galaxies which are confirmed to be members of the cluster. The cluster is classified as a Bautz-Morgan type III and Rood-Sastry class F cluster, indicating morphological irregularity and perhaps dynamical youth. It is receding from the Milky Way galaxy with a velocity of 12385 km/s.

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<span class="mw-page-title-main">NGC 703</span> Galaxy in the constellation Andromeda

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References

  1. 1 2 3 4 5 6 "NED results for object ABELL 0665". NASA/IPAC Extragalactic Database (NED). Retrieved March 16, 2012.
  2. 1 2 3 4 Gómez, Percy L.; Hughes, John P.; Birkinshaw, Mark (September 2000). "A Merger Scenario for the Dynamics of Abell 665". The Astrophysical Journal. 540 (2). Chicago, Illinois, USA: The University of Chicago Press: 726–740. arXiv: astro-ph/0004263 . Bibcode:2000ApJ...540..726G. doi:10.1086/309360. S2CID   26488518.
  3. ↑ Oegerle, William R.; Fitchett, Michael J.; Hill, John M.; Hintzen, Paul (July 20, 1991). "Dynamics of the microwave-decrement cluster Abell 665". Astrophysical Journal, Part 1. 376: 46–50. Bibcode:1991ApJ...376...46O. doi:10.1086/170254. ISSN   0004-637X.
  4. ↑ 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.
  5. 1 2 Bonamente, Massimiliano; Joy, Marshall K.; LaRoque, Samuel J.; Carlstrom, John E.; Reese, Erik D.; Dawson, Kyle S. (August 2006). "Determination of the Cosmic Distance Scale from Sunyaev-Zel'dovich Effect and Chandra X-Ray Measurements of High-Redshift Galaxy Clusters". The Astrophysical Journal. 647 (1). Chicago, Illinois, USA: The University of Chicago Press: 25–54. arXiv: astro-ph/0512349 . Bibcode:2006ApJ...647...25B. doi:10.1086/505291. S2CID   15723115.
  6. ↑ "Abell's richest cluster". www.spacetelescope.org. Retrieved 30 October 2017.


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