Abell 1689

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Abell 1689
300px
Hubble view of galaxy cluster Abell 1689. It combines both visible and infrared data, with a combined exposure time of over 34 hours.[1]
Observation data (Epoch J2000)
Constellation(s) Virgo
Right ascension 13h 11m 34.2s[2]
Declination −01° 21′ 56″
Richness class 4[3]
Bautz-Morgan classification II-III[3]
Redshift 0.1832[2]
Distance
(co-moving)		 754 Mpc (2,459 Mly) h−1
0.705[2]
X-ray flux (14.729 ± 8.1%)×10−11 erg s−1 cm−2 (0.1—2.4 keV)[2]
See also: Galaxy groups, Galaxy clusters, List of galaxy clusters

Abell 1689 is a galaxy cluster in the constellation Virgo nearly 2.2 billion light years away. It is one of the biggest and most massive galaxy clusters known and acts as a gravitational lens, distorting the images of galaxies that lie behind it.[4] It has the largest system of gravitational arcs ever found.[5]

Abell 1689 shows over 160,000 globular clusters, the largest population ever found.[6]

There is evidence of merging and gases in excess of 100 million degrees.[5] The massive gravitational nature of this system has been used to study dark matter and the effects of gravitational lensing.[7][8]

At the time of its discovery in 2008, one of the lensed galaxies, A1689-zD1, was the most distant galaxy found.[9][10]

Gallery

  • Yellow galaxies belong to the cluster itself. Red and blue are background galaxies gravitationally lensed.

  • Abell 1689.jpg

    Mass map of Abell 1689.

  • Globular clusters in Abell 1689.jpg

    Globular clusters in Abell 1689

See also

References

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External links

Coordinates: Sky map 13h 11m 34.2s, −01° 21′ 56″


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