Abell 370
| Abell 370 | |
|---|---|
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Abell 370 seen by the Hubble Space Telescope on 16 July 2009.
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| Observation data (Epoch J2000) | |
| Constellation(s) | Cetus |
| Right ascension | 02h 39m 50.5s[1] |
| Declination | −01° 35′ 08″[1] |
| Richness class | 0[2] |
| Bautz-Morgan classification | II-III[2] |
| Redshift | 0.375[1] |
| Distance (co-moving) |
1,464 Mpc (4,775 Mly) h−1 0.705 [1] |
| See also: Galaxy groups, Galaxy clusters, List of galaxy clusters | |
Abell 370 is a galaxy cluster located approximately 6 billion light-years away from the Earth (at redshift z = 0.375), in the constellation Cetus. Its core is made up of several hundred galaxies. It was catalogued by George Abell, and is the most distant of the clusters he catalogued.
Gravitational lensing
Abell 370 appears to include several arcs of light, which in fact are mirages caused by gravitational lensing of more distant objects.[3]
In 2002, astronomers used this lensing effect to discover a galaxy, HCM-6A, 12.8 billion light years away from Earth. At the time it was the furthest known galaxy.[4]
In 2009, study in the field of Abell 370 revealed a grouping of background galaxies lensed and distorted by the cluster into an arc with the appearance of a dragon, hence nicknamed The Dragon[5] by NASA scientists.[6] Its head is composed of a spiral galaxy,[7] with another spiral composing the tail. Several other galaxies form the body of the dragon, all overlapping.[8] These galaxies all lie approximately 5 billion light years away.
See also
References
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<references />, or <references group="..." />- Gravitationally lensed images in Abell 370 Authors: Grossman, S. A. & Narayan, R. Bibcode: 1989ApJ...344..637G
External links
- Abell 370 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
Coordinates: 
02h 39m 50.5s, −01° 35′ 08″
| Morphology | |
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| Structure | |
| Active nuclei | |
| Energetic galaxies | |
| Low activity | |
| Interaction | |
| Lists | |
| See also | |
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- ↑ 1.0 1.1 1.2 1.3 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 2.0 2.1 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ New York Times, "SCIENCE WATCH; Mirages in the Sky May Not Be So Rare" Tuesday, October 18, 1988
- ↑ BBC News, "Far away stars light early cosmos" Thursday, 14 March 2002, 11:38 GMT
- ↑ Astronomy Now, "Refurbished Hubble gets off to a flying start" 09-09-09 (accessed 2009-11-07)
- ↑ New York Times, "The Universe, in High Definition" 09/09/09 (accessed 2009-11-07)
- ↑ New Scientist, "Upgraded Hubble telescope spies cosmic 'dragon' " 09.09.09 (accessed 2009-11-07)
- ↑ National Geographic, "NEW HUBBLE PICTURES: First Shots From Upgraded Orbiter" Saturday, November 7, 2009 (accessed 2009-11-07)
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