| Abell 2261 | |
|---|---|
| 👁 Image Abell 2261 | |
| Observation data (Epoch J2000) | |
| Constellation | Hercules |
| Right ascension | 17h 22m 26.9s[1] |
| Declination | +32° 07′ 58″[1] |
| Redshift | 0.224 |
| Distance | 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) |
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.[2]
It also has the galaxy A2261-BCG (short for Abell 2261 Brightest Cluster Galaxy) which has one of the largest galaxy cores ever observed.[3]
In January 2021, astronomers using the Hubble Space Telescope were reported to be unable to locate a supermassive black hole presumed to be at the center of the galaxy.[4] A newer and larger space telescope, the James Webb Space Telescope, launched in December 2021, may help determine the object's whereabouts, according to the astronomers.[4]
References
[edit]- ^ a b "Abell 2261". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2025-03-19.
- ^ "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.
- ^ a b 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.
