M60-UCD1
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| M60-UCD1 | |
|---|---|
 M60-UCD1 by Hubble Space Telescope This image is a fragment of a much larger image
showing the nearby Messier 60. | |
| Observation data | |
| See also: Galaxy, List of galaxies |
M60-UCD1 is an ultracompact dwarf galaxy and possibly the densest known galaxy.[1] It is 54 million light years from Earth, close to Messier 60 (NGC 4649). Half of its mass is in the central sphere 160 light years in diameter.[2] Its mass is 200 million solar masses. Metalicity is similar to the sun. There is a bright X-ray source in the centre, possibly a black hole.[3]
References
- ↑ "Evidence for densest galaxy in nearby universe". Phys.org. 24 September 2013. Retrieved 25 September 2013.
- ↑ "Astronomers Discover Densest Galaxy Ever". ScienceDaily. Retrieved 26 September 2013.
- ↑ "M60-UCD1: An Ultra-Compact Dwarf Galaxy". NASA. Retrieved 25 September 2013.
Further reading
- Strader, Jay; Seth, Anil C.; Forbes, Duncan A.; Fabbiano, Giuseppina; Romanowsky, Aaron J.; Brodie, Jean P.; Conroy, Charlie; Caldwell, Nelson; Pota, Vincenzo; Usher, Christopher; Arnold, Jacob A.; "The Densest Galaxy", The Astrophysical Journal Letters, Volume 775, Issue 1, article id. L6, 6 pp., September 2013; doi:10.1088/2041-8205/775/1/L6 ; Bibcode: 2013ApJ...775L...6S ; arXiv:1307.7707
External links
- Chandra X-Ray Observatory, "NASA's Hubble and Chandra Find Evidence for Densest Nearby Galaxy", NASA, 24 September 2013
- ScienceDaily, "Evidence for Densest Nearby Galaxy", 24 September 2013
- ScienceDaily, "Astronomers Discover Densest Galaxy Ever", 24 September 2013
See also
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