MACS J0647.7+7015
 MACS J0647.7+7015 | |
| Observation data (Epoch 2000) | |
|---|---|
| Constellation(s) | Camelopardalis |
| Right ascension | 06h 47m 42s |
| Declination | +70° 15′ |
| Redshift | 0.592[1] |
| Distance | 2,180 Mpc (7,110 Mly) h−1 0.70 |
| ICM temperature | 13.3 ± 1.80 keV |
| Binding mass | 2.07 ± 0.10×1014 h−1 0.70[2] M☉ |
| X-ray luminosity | 32.5 ± 2.1 ×1044 erg s−1 (bolometric) |
MACS J0647.7+7015 is a galaxy cluster with a redshift z = 0.592, located at J2000.0 right ascension 06h 47m 42s declination +70° 15′. It lies between the Big Dipper and Little Dipper in the constellation Camelopardalis. It is part of a sample[3] of 12 extreme galaxy clusters at z > 0.5 discovered by the MAssive Cluster Survey (MACS).
During 2012 the galaxy cluster was announced as gravitationally lensing the most distant galaxy (MACS0647-JD), then ever imaged (z = 11).[4][5][6][7]
Notable stars in MACS J0647.7+7015
[edit]Two extremely magnified lensed star candidates were found in this cluster, one is a large blue supergiant, and the other is a large white supergiant. The first lensed star is MACS J0647.7+7015 LS 1, which is a large white supergiant with a mass of 20 Solar masses, has a temperature of 10,000 K, and an impressive average size of 1,182 Solar radii. The second lensed star, MACS J0647.7+7015 LS 2 is the smaller blue supergiant which has a mass of 50 Solar masses, has a temperature of 12,000 K, and a smaller but still impressive average size of 1,033 Solar radii. They are both B-type supergiants. [[1]] [[2]] [[3]]
References
[edit]- ^ Ebeling, Harald; Elizabeth Barrett; David Donovan; Cheng-Jiun Ma; Alastair Edge; Leon van Speybroeck (2007). "A Complete Sample of 12 Very X-Ray Luminous Galaxy Clusters at z > 0.5". Astrophysical Journal Letters. 661 (1): 33. arXiv:astro-ph/0703394. Bibcode:2007ApJ...661L..33E. doi:10.1086/518603. S2CID 118914497.
- ^ Zitrin, Adi; Tom Broadhurst; Rennan Barkana; Yoel Rephaeli; Narciso Benítez (2011). "Strong-lensing analysis of a complete sample of 12 MACS clusters at z > 0.5: mass models and Einstein radii". MNRAS. 410 (410): 1939. arXiv:1002.0521. Bibcode:2011MNRAS.410.1939Z. doi:10.1111/j.1365-2966.2010.17574.x. S2CID 118367441.
- ^ Ebeling, Harald; Elizabeth Barrett; David Donovan; Cheng-Jiun Ma; Alastair Edge; Leon van Speybroeck (2007). "A Complete Sample of 12 Very X-Ray Luminous Galaxy Clusters at z > 0.5". Astrophysical Journal Letters. 661 (1): 33. arXiv:astro-ph/0703394. Bibcode:2007ApJ...661L..33E. doi:10.1086/518603. S2CID 118914497.
- ^ Dan Coe; et al. (November 15, 2012). "CLASH: Three Strongly Lensed Images of a Candidate z ~ 11 Galaxy". The Astrophysical Journal. 762 (1): 32. arXiv:1211.3663. Bibcode:2013ApJ...762...32C. doi:10.1088/0004-637X/762/1/32. S2CID 119114237.
- ^ Youtube, Zoom on galaxy cluster MACS J0647.7+7015
- ^ Strong-lensing analysis of a complete sample of 12 MACS clusters at z > 0.5: mass models and Einstein radii[permanent dead link]
- ^ NASA Hubblesite, NASA Great Observatories Find Candidate for Most Distant Galaxy Yet Known
External links
[edit]
Media related to MACSJ0647.7+7015 at Wikimedia Commons
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