Abell 400
Galaxy cluster in the constellation Cetus / From Wikipedia, the free encyclopedia
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Abell 400 is a galaxy cluster which contains the galaxy NGC 1128 with two supermassive black holes (3C 75) spiraling towards merger.
Quick Facts Observation data (Epoch J2000), Constellation(s) ...
Abell 400 | |
---|---|
Observation data (Epoch J2000) | |
Constellation(s) | Cetus |
Right ascension | 02h 57m 38.6s[1] |
Declination | +06° 02′ 00″[1] |
Richness class | 1[2] |
Bautz–Morgan classification | II-III[2] |
Redshift | 0.0244 (7 315 km/s)[1] |
Distance | 100 Mpc (326 Mly) h−1 0.705 |
X-ray flux | (16.2 ± 20.5%)×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 |
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These two supermassive black holes are contained in NGC 1128. The galaxy, microwave radio jets, multi-million degree X-ray producing gas and resultant radio source is known as 3C 75. X-ray source 2A 0252+060 (1H 0253+058, XRS 02522+060) may be some additional or other portion of Abell 400.[3]
The black holes are an estimated 25,000 light years apart, and thus will take millions of years to collide. Should the two supermassive black holes merge, they will form a single super-supermassive black hole.[4]