Astronomy:Abell 754
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Short description: Galaxy cluster
| Abell 754 | |
|---|---|
| Observation data (Epoch J2000) | |
| Constellation(s) | Hydra |
| Right ascension | 09h 08m 50.1s[1] |
| Declination | −09° 38′ 12″[1] |
| Richness class | 2[2] |
| Bautz–Morgan classification | I-II[2] |
| Redshift | 0.5420 (16 249 km/s)[1] |
| Distance (co-moving) | 233 Mpc (760 Mly) h−10.705 [1] |
| X-ray flux | 4.35×10−11 erg s−1 cm−2 (0.5–2 keV)[1] |
Abell 754 is a galaxy cluster in the constellation Hydra that was formed from the collision of two smaller clusters. This collision, which began about 300 million years ago, is ongoing, and the system is still disturbed. Eventually, the cluster will reach a level of equilibrium in a few billion years.
See also
References
- ↑ 1.0 1.1 1.2 1.3 1.4 "NED results for object ABELL 0754". NASA/IPAC Extragalactic Database (NED). http://ned.ipac.caltech.edu/cgi-bin/nph-objsearch?objname=Abell+754&extend=no.
- ↑ 2.0 2.1 Abell, George O.; Corwin, Harold G., Jr.; Olowin, Ronald P. (May 1989). "A catalog of rich clusters of galaxies" (PDF). Astrophysical Journal Supplement Series 70 (May 1989): 1–138. doi:10.1086/191333. ISSN 0067-0049. Bibcode: 1989ApJS...70....1A. http://articles.adsabs.harvard.edu/cgi-bin/nph-iarticle_query?bibcode=1989ApJS...70....1A&page_ind=0&epage_ind=137&type=PRINTER&data_type=PDF_HIGH&email=&emailsize=500&emailsplit=YES&send=GET&verified=YES. Retrieved March 12, 2012.
External links
- MASSIVE MERGER OF GALAXIES IS THE MOST POWERFUL ON RECORD (NASA)
- Galaxies rent asunder in huge cosmic collision
Coordinates: 
09h 08m 50.1s, −09° 38′ 12″
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