SDSS J0900+2234 FG
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 SDSS J0900+2234 FG (Hubble Space Telescope) | |
| Object type | Galaxy cluster |
|---|---|
| Other designations | [RRB2014] RM J090002.6+223410.5, GMBCG 135.01103+22.56803 |
Observation data (Epoch J2000) | |
| Constellation | Cancer |
| 09h 00m 02.6s | |
| Declination | +22° 34′ 04″ |
| Redshift | 0.4843 |
SDSS J0900+2234 FG is a galaxy cluster located in the direction of the constellation Cancer, at a distance of more than 4.7 billion light-years from Earth, corresponding to a comoving distance of 5.804 billion light-years.[1]
The cluster is composed of 28 galaxies. The brightest member is SDSS J090002.64+223404.8, also known as LRG-4-606, where LRG stands for Luminous Red Galaxy, a class of galaxies cataloged by the Sloan Digital Sky Survey.[2] These are typically massive elliptical galaxies composed predominantly of old stellar populations.
Around LRG-4-606, a gravitational lensing phenomenon is observed in the form of an incomplete ring, representing a distant background galaxy, SDSS J0900+2234 BG.[3] The background galaxy has a redshift of z = 2.03,[4] and is located at a light-travel distance of 10.088 billion light-years (comoving distance: 16.777 billion light-years). Its image is magnified and distorted by the gravitational field of the foreground cluster.
Images of this phenomenon were captured by the Hubble Space Telescope in 2011.[5]
