IDCS J1426.5+3508: WEAK LENSING ANALYSIS of A MASSIVE GALAXY CLUSTER at z = 1.75

Wenli Mo, Anthony Gonzalez, M. James Jee, Richard Massey, Jason Rhodes, Mark Brodwin, Peter Eisenhardt, Daniel P. Marrone, S. A. Stanford, Gregory R. Zeimann

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Abstract

We present a weak lensing study of the galaxy cluster IDCS J1426.5+3508 at z = 1.75, which is the highest-redshift strong lensing cluster known and the most distant cluster for which a weak lensing analysis has been undertaken. Using F160W, F814W, and F606W observations with the Hubble Space Telescope, we detect tangential shear at 2σ significance. Fitting a Navarro-Frenk-White mass profile to the shear with a theoretical median mass-concentration relation, we derive a mass Mo. This mass is consistent with previous mass estimates from the Sunyaev-Zel'dovich (SZ) effect, X-ray, and strong lensing. The cluster lies on the local SZ-weak lensing mass scaling relation observed at low redshift, indicative of minimal evolution in this relation.

Original languageEnglish
Article numberL25
JournalAstrophysical Journal Letters
Volume818
Issue number2
DOIs
Publication statusPublished - 2016 Feb 20

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

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    Mo, W., Gonzalez, A., Jee, M. J., Massey, R., Rhodes, J., Brodwin, M., Eisenhardt, P., Marrone, D. P., Stanford, S. A., & Zeimann, G. R. (2016). IDCS J1426.5+3508: WEAK LENSING ANALYSIS of A MASSIVE GALAXY CLUSTER at z = 1.75. Astrophysical Journal Letters, 818(2), [L25]. https://doi.org/10.3847/2041-8205/818/2/L25