Weak lensing analysis of RXC J2248.7-4431
| Autor: | Gruen, D., Brimioulle, F., Seitz, S., Lee, C. -H., Young, J., Koppenhoefer, J., Eichner, T., Riffeser, A., Vikram, V., Weidinger, T., Zenteno, A. |
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| Rok vydání: | 2013 |
| Předmět: | |
| Zdroj: | MNRAS (2013), 432, 2, 1455 |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1093/mnras/stt566 |
| Popis: | We present a weak lensing analysis of the cluster of galaxies RXC J2248.7-4431, a massive system at z=0.3475 with prominent strong lensing features covered by the HST/CLASH survey (Postman et al. 2012). Based on UBVRIZ imaging from the WFI camera at the MPG/ESO-2.2m telescope, we measure photometric redshifts and shapes of background galaxies. The cluster is detected as a mass peak at 5sigma significance. Its density can be parametrised as an NFW profile (Navarro et al. 1996) with two free parameters, the mass M_200m=(33.1+9.6-6.8)x10^14Msol and concentration c_200m=2.6+1.5-1.0. We discover a second cluster inside the field of view at a photometric redshift of z~0.6, with an NFW mass of M_200m=(4.0+3.7-2.6)x10^14Msol. Comment: 15 pages, 17 figures; matching published version |
| Databáze: | arXiv |
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