Abell 400
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Abell 400 is a
galaxy cluster A galaxy cluster, or a cluster of galaxies, is a structure that consists of anywhere from hundreds to thousands of galaxies that are bound together by gravity, with typical masses ranging from 1014 to 1015 solar masses. Clusters consist of galax ...
which contains the
galaxy A galaxy is a Physical system, system of stars, stellar remnants, interstellar medium, interstellar gas, cosmic dust, dust, and dark matter bound together by gravity. The word is derived from the Ancient Greek, Greek ' (), literally 'milky', ...
NGC 1128 with two
supermassive black holes A supermassive black hole (SMBH or sometimes SBH) is the largest type of black hole, with its mass being on the order of hundreds of thousands, or millions to billions, of times the mass of the Sun (). Black holes are a class of astronomical o ...
(
3C 75 3C 75 (also called 3C75) is a binary black hole system in the dumbbell-shaped galaxy NGC 1128 in the galaxy cluster Abell 400. It has four relativistic jets, two coming from each accreting supermassive black hole A superma ...
) spiraling towards merger. 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. 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.


Gallery

File:Abell 400 color cutout rings.v3.skycell.1423.055.stk.4021783.4015840.4029940.unconv.fits sci.jpg, alt=, wider view of Abell 400 with PanSTARRS File:3C75 in Radio+Xray.jpg, alt=, Two supermassive black holes
3C 75 3C 75 (also called 3C75) is a binary black hole system in the dumbbell-shaped galaxy NGC 1128 in the galaxy cluster Abell 400. It has four relativistic jets, two coming from each accreting supermassive black hole A superma ...
spiraling towards merger near the center of NGC 1128, some 25,000 light years away from each other.


See also

*
Abell catalogue The Abell catalog of rich clusters of galaxies is an all-sky catalog of 4,073 rich galaxy clusters of nominal redshift ''z'' ≤ 0.2. This catalog supplements a revision of George O. Abell's original "Northern Survey" of 1958, whi ...
*
List of Abell clusters The Abell catalogue is a catalogue of approximately 4,000 galaxy clusters with at least 30 members, almost complete to a redshift of ''z'' = 0.2. It was originally compiled by the American astronomer George O. Abell in 1958 using plates from Nati ...
* NGC 1128 *
3C 75 3C 75 (also called 3C75) is a binary black hole system in the dumbbell-shaped galaxy NGC 1128 in the galaxy cluster Abell 400. It has four relativistic jets, two coming from each accreting supermassive black hole A superma ...


References


External links


Pair of black holes locked in death dance
(CNN) Thursday, April 6, 2006; Posted: 2:46 p.m. EDT (18:46 GMT)

(SPACE.com) 6 April 2006 11:48 am ET

(SpaceDaily) Apr 12, 2006
Study Finds Two Supermassive Black Holes Spiraling Toward Collision
(Newswise) Apr 6, 2006 0400 Abell richness class 1 Galaxy clusters Cetus {{galaxy-cluster-stub