A multi-wavelength mass analysis of RCS2 J232727.6-020437, A ∼3 × 1015 Mo galaxy cluster at z = 0.7

K. Sharon, M. D. Gladders, D. P. Marrone, H. Hoekstra, E. Rasia, H. Bourdin, D. Gifford, A. K. Hicks, C. Greer, T. Mroczkowski, L. F. Barrientos, M. Bayliss, J. E. Carlstrom, D. G. Gilbank, M. Gralla, J. Hlavacek-Larrondo, E. Leitch, P. Mazzotta, C. Miller, S. J.C. MuchovejT. Schrabback, H. K.C. Yee

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13 Scopus citations


We present an initial study of the mass and evolutionary state of a massive and distant cluster, RCS2 J232727.6-020437. This cluster, at z = 0.6986, is the richest cluster discovered in the RCS2 project. The mass measurements presented in this paper are derived from all possible mass proxies: X-ray measurements, weak-lensing shear, strong lensing, Sunyaev-Zel'dovich effect decrement, the velocity distribution of cluster member galaxies, and galaxy richness. While each of these observables probe the mass of the cluster at a different radius, they all indicate that RCS2 J232727.6-020437 is among the most massive clusters at this redshift, with an estimated mass of M200∼3×1015h70 -1M. In this paper, we demonstrate that the various observables are all reasonably consistent with each other to within their uncertainties. RCS2 J232727.6-020437 appears to be well relaxed - with circular and concentric X-ray isophotes, with a cool core, and no indication of significant substructure in extensive galaxy velocity data.

Original languageEnglish (US)
Article number21
JournalAstrophysical Journal
Issue number1
StatePublished - Nov 20 2015


  • galaxies: clusters: individual (RCS2 J232727.6-020437)

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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    Sharon, K., Gladders, M. D., Marrone, D. P., Hoekstra, H., Rasia, E., Bourdin, H., Gifford, D., Hicks, A. K., Greer, C., Mroczkowski, T., Barrientos, L. F., Bayliss, M., Carlstrom, J. E., Gilbank, D. G., Gralla, M., Hlavacek-Larrondo, J., Leitch, E., Mazzotta, P., Miller, C., ... Yee, H. K. C. (2015). A multi-wavelength mass analysis of RCS2 J232727.6-020437, A ∼3 × 1015 Mo galaxy cluster at z = 0.7. Astrophysical Journal, 814(1), [21]. https://doi.org/10.1088/0004-637X/814/1/21