Abell 2261
Abell 2261 is one of 25 galaxy clusters being studied as part of the Cluster Lensing And Supernova survey with Hubble (CLASH) program, a major project to build a library of scientific data on lensing clusters.[1]
| Abell 2261 | |
|---|---|
 Abell 2261 Credit: Hubble Space Telescope | |
| Observation data (Epoch 2000) | |
| Right ascension | 17h 22m |
| Declination | +32° 08′ |
| Redshift | 0.224 |
| Distance (co-moving) | 909 Mpc (3 Gly) h−1 0.70 |
| ICM temperature | 7.6 ± 0.30 keV |
| Binding mass | 2.9 ± 0.5×1014 h−1 0.70 M☉ |
| X-ray luminosity | 18.0 ± 0.2 ×1044 erg s−1 (bolometric) |
It also has the galaxy A2261-BCG (short for Abell 2261 Brightest Cluster Galaxy) which has the largest galaxy core ever observed.[2]
In January 2021, astronomers, using the Hubble Space Telescope, are reported to have been unable to locate a supermassive black hole presumed to be at the center of the galaxy.[3] A newer and larger space telescope, the James Webb Space Telescope, scheduled to be launched in October 2021, may help explain the whereabouts of the object, according to the astronomers.[3]
References
- "NASA - Monster Galaxy May Have Been Stirred Up By Black-hole Mischief". www.nasa.gov. October 25, 2012. Retrieved 2016-07-15.
- "Monster Galaxy's Core Is Biggest Ever Seen". www.space.com. October 26, 2012. Retrieved 2016-07-15.
- Overbye, Dennis (19 January 2021). "Missing: One Black Hole With 10 Billion Solar Masses - One of the biggest galaxies in the universe seems to lack its dark centerpiece". The New York Times. Retrieved 19 January 2021.
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