Abell 1689

Abell 1689

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

See also

References

  1. ↑ "New Hubble image of galaxy cluster Abell 1689". ESA/Hubble Press Release. Retrieved 14 September 2013.
  2. 1 2 3 4 "NASA/IPAC Extragalactic Database". Results for Abell 1689. Retrieved 2012-03-17.
  3. 1 2 Abell, George O.; Corwin, Harold G., Jr.; Olowin, Ronald P. (May 1989). "A catalog of rich clusters of galaxies" (PDF). Astrophysical Journal Supplement Series 70 (May 1989): 1–138. Bibcode:1989ApJS...70....1A. doi:10.1086/191333. ISSN 0067-0049. Retrieved March 12, 2012.
  4. ↑ Falcon-Lang, Howard (19 August 2010). "Fate of Universe revealed by galactic lens". BBC News. BBC. Archived from the original on 19 August 2010. Retrieved 19 August 2010.
  5. 1 2 "Purple Haze, Part Deux". NASA. 12 September 2008. Retrieved 19 September 2012.
  6. ↑ "Globular clusters within Abell 1689". HUBBLE/ESA. 12 September 2013. Retrieved 19 September 2013.
  7. ↑ "Detailed Dark Matter Map Yields Clues to Galaxy Cluster Growth". NASA. 11 December 2010. Retrieved 19 September 2012.
  8. ↑ Diego, Jose M.; Broadhurst, T.; Benitez, N.; Umetsu, K.; Coe, D.; Sendra, I.; et al. (2014). "A Free-Form Lensing Grid Solution for A1689 with New Multiple Images". MNRAS 446 (1). Bibcode:2015MNRAS.446..683D. doi:10.1093/mnras/stu2064.
  9. ↑ "Astronomers Eye Ultra-Young, Bright Galaxy in Early Universe". nasa.gov. 2008-02-12. Retrieved 2008-02-25.
  10. ↑ "Astronomers Uncover One of the Youngest and Brightest Galaxies in the Early Universe". Space Telescope Science Institute Baltimore, Md. / nasa.gov. 2008-02-12. Archived from the original on 17 February 2008. Retrieved 2008-02-25.

External links

Wikimedia Commons has media related to Abell 1689.

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


This article is issued from Wikipedia - version of the Friday, January 01, 2016. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.