NGC 1128
| Galaxy NGC 1128 |
|
|---|---|
|
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| Binary black holes 3C 75 in the center of the dumbbell-shaped galaxy NGC 1128 | |
| AladinLite | |
| Constellation | whale |
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Position equinox : J2000.0 , epoch : J2000.0 |
|
| Right ascension | 02 h 57 m 41.6 s |
| declination | + 06 ° 01 ′ 29 ″ |
| Appearance | |
| Morphological type | E0 |
| Brightness (visual) | 14.5 mag |
| Brightness (B-band) | 15.5 mag |
| Angular expansion | 0 ', 5 × 0', 5 |
| Surface brightness | 13.1 mag / arcmin² |
| Physical data | |
| Affiliation | Abell 400 |
| Redshift | 0.023153 ± 0.000067 |
| Radial velocity | 6940 ± 20 km / s |
|
Stroke distance v rad / H 0 |
(311 ± 22) x 10 6 ly (95.3 ± 6.7) Mpc |
| history | |
| discovery | Lewis Swift |
| Discovery date | October 8, 1886 |
| Catalog names | |
| NGC 1128 • PGC 11188/11189 • CGCG 415-041 • MCG + 01-08-27 • DRCG 9-43 • KCPG 84 | |
NGC 1128 is a pair of merging galaxies in the constellation Whale . The distance to the Milky Way is about 311 million light years . The object consists of PGC 11188, an elliptical galaxy of type E0, and PGC 11189, an elliptical galaxy of type E3.
In the center of this structure, the nuclei of the two components, two supermassive black holes , circle each other at a distance of 25,000 light years and slowly approach each other. They cause huge radio emissions and the “ swirling ” jets seen in the picture .
The radio source is known in professional circles under the name 3C 75 .
The object is a member of the Abell 400 galaxy cluster .
The discovery of NGC 1128 on October 8, 1886 is attributed to Lewis Swift , but the position published in 1886 differs by 5 arc minutes.
Web links
- Black Holes Dance With Incredible Violence (SpaceDaily) Apr 12, 2006
- 3C 75 in Abell 400: Black Holes Determined to be Bound (Chandra AXAF)
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More Images of 3C 75 in Abell 400 (Chandra AXAF)
- NGC 1128 (jpeg, Chandra AXAF)
