Abell 2142

Abell 2142
Chandra X-ray Observatory image of Abell 2142.
Observation data (Epoch J2000)
Constellation(s)Corona Borealis
Right ascension15h 58m 19.8s [1]
Declination+27° 13′ 45.0″ [1]
Number of galaxies> 100
Richness class2[2]
Bautz–Morgan classificationII[2]
Redshift0.09090 (27 251 km/s) [3]
Distance381 Mpc (1,243 Mly) h−1
0.705
[3]
Binding mass~6.3×1017 M
X-ray flux(6.50 ± 0.70)×10−11 erg s−1 cm−2 (2-10 keV) [3]

Abell 2142, or A2142, is a huge, X-ray luminous galaxy cluster in the constellation Corona Borealis. It is the result of a still ongoing merger between two galaxy clusters. The combined cluster is six million light years across, contains hundreds of galaxies and enough gas to make a thousand more. It is "one of the most massive objects in the universe."[1]

  1. ^ a b c "Cosmic Pressure Fronts Mapped by Chandra". CXC PR: 00-08. Harvard-Smithsonian Center for Astrophysics. 1 Mar 2000. Retrieved 11 Nov 2008.
  2. ^ a b 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 13, 2012.
  3. ^ a b c Cite error: The named reference NED was invoked but never defined (see the help page).