BoRG-58
| BoRG-58 | |
|---|---|
 | |
| Observation data (Epoch J2000) | |
| Constellation(s) | Böotes |
| Right ascension | 14 h 36 m 55.11 s |
| Declination | +50° 43′ 09.8″ |
| Number of galaxies | 5 |
| Redshift | ~ 8 |
| Distance | 13.1 billion light-years (Light travel distance) |
BoRG-58 is a galaxy cluster, located in the constellation Boötes, discovered during a randomized infrared sky scan as part of the Brightest of Reionizing Galaxies (BoRG) program, using the Wide Field Camera 3 of the Hubble Space Telescope.[1][2][3]BoRG-58 is located at a distance of 13.1 billion light-years (light-travel time).
In the cluster, more properly defined as a protocluster of galaxies, five young galaxies have been identified whose images date back to an era corresponding to when the Universe was only 600 million years old from the Big Bang. This phase coincides with the epoch of reionization[3], the period during which the hydrogen of the gas present in the Universe passed from an almost completely neutral state to being almost completely ionized. These five galaxies were small in size, about 1/20 of the Milky Way, but nevertheless had a luminosity comparable to it.
References
[edit]- ^ "HubbleSite - NewsCenter - Hubble Pinpoints Farthest Protocluster of Galaxies Ever Seen (01/10/2012) - NASA Release". hubblesite.org. Retrieved 2015-12-17.
- ^ "Hubble pinpoints furthest protocluster of galaxies ever seen". spacetelescope.org. Retrieved 2015-12-17.
- ^ a b Trenti, Michele; Bradley, L. D.; Stiavelli, M. (2012-02-10). "OVERDENSITIES OF Y -DROPOUT GALAXIES FROM THE BRIGHTEST-OF-REIONIZING GALAXIES SURVEY: A CANDIDATE PROTOCLUSTER AT REDSHIFT z ≈ 8". The Astrophysical Journal. 746 (1). doi:10.1088/0004-637x/746/1/55. Retrieved 2015-12-17.
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