Musket Ball Cluster Explained
| Musket Ball Cluster |
| Epoch: | J2000.0[1] |
| Constellation: | Cancer |
| Redshift: | 0.53 |
The Musket Ball Cluster (DLSCL J0916.2+2951) is a galaxy cluster that exhibits separation between its baryonic matter and dark matter components. The cluster is a recent merger of two galaxy clusters. It is named after the Bullet Cluster, as it is a slower collision, and older than the Bullet Cluster. This cluster is further along the process of merger than the Bullet Cluster,[2] being some 500 million years older, at 700 million years old.[3] The cluster was discovered in 2011 by the Deep Lens Survey.[4] As of 2012, it is one of the few galaxy clusters to show separation between its dark matter and baryonic matter components.[5]
Characteristics
As of 2012, it is one of seven galaxy clusters that exhibit separation of dark matter and baryonic matter following cluster collision and merger.[2] The separation between the galaxies and their dark matter components is on average 19000ly. This separation may indicate that dark matter may interact with itself, through a dark force (a force that only interacts with dark matter) or a set of dark forces.[6] The galaxy cluster itself is some 8e6ly across.[7]
See also
- Other dissociative galaxy cluster mergers known at time of discovery
External links
Notes and References
- NAME Musket Ball Cluster . 27 July 2014 .
- Web site: DLSCL J0916.2+2951: Discovery of the Musket Ball Cluster . Chandra X-Ray Observatory . . 12 April 2012 .
- Web site: The Musket Ball Cluster is 500 million years older than the Bullet Cluster . Mark Brown . 13 April 2012 . Wired . 5 September 2017 . https://web.archive.org/web/20150304160357/http://www.wired.co.uk/news/archive/2012-04/13/musket-ball-cluster . 4 March 2015 . dead .
- Discovery of a Dissociative Galaxy Cluster Merger with Large Physical Separation . 6 . Dawson, William A. . Wittman, David . Jee, M. James . Gee, Perry . Hughes, John P. . Tyson, J. Anthony . Schmidt, Samuel . Thorman, Paul . Bradač, Maruša . Miyazaki, Satoshi . Lemaux, Brian . Utsumi, Yousuke . Margoniner, Vera E. . 19 October 2011 . March 2012 . 1110.4391 . 2012ApJ...747L..42D . 10.1088/2041-8205/747/2/L42 . The Astrophysical Journal Letters . 747 . 2 . L42 . 6 . 119244278 .
- Web site: Constraining Dark Matter with the Musket Ball Cluster . 6 May 2012 . Will . Dawson . Will Dawson - Cosmology Research . dead . https://web.archive.org/web/20150122063932/http://www.dawsonresearch.com/blog/constraining-dark-matter-with-the-musket-ball-cluster . 22 January 2015 .
- Web site: Galactic Pile-Up May Point to Mysterious New Dark Force in the Universe . 9 January 2013 . Adam Mann . Wired .
- Web site: Galactic Collision May Contain Clues About Dark Matter . Adam Mann . Wired . 12 April 2012 .
