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SPT-CL J2106−5844

Galaxy in the constellation Indus

SPT-CLJ2106−5844 is a galaxy cluster located 7.5 billion light years from Earth. It was discovered by scientists from the South Pole Telescope Collaboration, using the South Pole Telescope. With a weight of about 1.27 × 1015 solar masses, it is the most massive distant object known, as of 2011. It is about 60% heavier than previously known object detected in 2008, SPT-CL J0546−5345.

This galaxy cluster was found in the South Pole Telescope Sunyaev-Zel'dovich (SPT-SZ) survey. This survey was done using the Advanced Camera for Surveys and Wide Field Camera 3 on the Hubble Space Telescope. There have been many observations completed in x-ray and infrared imaging to discover new observations about this massive cluster. Like how the central dump is resolved into two different substructures – northwestern and southeastern – which are separated by a distance of ~150 kpc. This distance is immense, considering the distance from Earth to the Galactic Center is only 7-10 kpc. To put this in perspective, the Milky Way galaxy could fit 20 times between these two substructures, the actual diameter of 'SPT-CLJ2106' is much bigger than just this gap.

The cluster has a redshift of z=1.132.

References

(2011-04-12). "Antarctica Telescope Finds Most Massive Distant Object -1000 Times Mass of Milky Way". The Daily Galaxy.
Foley, R. J.. (20 April 2011). "DISCOVERY AND COSMOLOGICAL IMPLICATIONS OF SPT-CL J2106-5844, THE MOST MASSIVE KNOWN CLUSTER AT z>1". The Astrophysical Journal.
(2019-10-10). "Precise Mass Determination of SPT-CL J2106-5844, the Most Massive Cluster at z>1". Cornell University.
Reichardt, Christian. (2011-01-11). "SPT SZ Observations". Planck conference.

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galaxy-clusters indus-(constellation)

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