HCM-6A
HCM-6A | |
---|---|
Observation data (J2000 epoch) | |
Constellation | Cetus |
Right ascension | 02h 39m 54.7s |
Declination | −01° 33′ 32″ |
Redshift | 6.56 |
Distance | 12.8 billion light years (4.0 billion parsecs) (light travel distance) 28.2 billion light years (8.6 billion parsecs) (comoving distance) |
Apparent magnitude (V) | 24.24 |
Characteristics | |
Type | LAE |
Other designations | |
HCB2010 J023954-013332 |
HCM-6A is an LAE galaxy that was found in 2002 by and Lennox Cowie from the University of Hawaii and from the University of Cambridge, using the Keck II Telescope in Hawaii. HCM-6A is located behind the Abell 370 galactic cluster, near M77[1] in the constellation Cetus, which enabled the astronomers to use Abell 370 as a gravitational lens to get a clearer image of the object.[2][3]
HCM-6A was the farthest object known at the time of its discovery. It exceeded (z = 5.74) as the most distant normal galaxy known, and quasar (z = 6.28) as the most distant object known. In 2003, (z = 6.578) was discovered, and took over the title of most remote object known, most remote galaxy known, and most remote normal galaxy known.
References[]
- ^ Halton Arp & David Russell (2001). "A Possible Relationship between Quasars and Clusters of Galaxies". The Astrophysical Journal. 549 (2): 802–819. Bibcode:2001ApJ...549..802A. doi:10.1086/319438.
- ^ E. M. Hu, et al. (2001). "A Redshift z = 6.56 Galaxy behind the Cluster Abell 370". The Astrophysical Journal Letters. 568 (2): L75–L79. arXiv:astro-ph/0203091. Bibcode:2002ApJ...568L..75H. doi:10.1086/340424.
- ^ Press release, National Astronomical Observatory of Japan, September 13, 2006
Categories:
- Dwarf galaxies
- Cetus (constellation)
- Galaxy stubs