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arxiv: 1601.07967 · v1 · pith:YTJIPYXEnew · submitted 2016-01-29 · 🌌 astro-ph.CO

IDCS J1426.5+3508: Weak Lensing Analysis of a Massive Galaxy Cluster at z=1.75

Wenli Mo , Anthony H. Gonzalez , M. James Jee , Richard Massey , Jason Rhodes , Mark Brown , Peter Eisenhardt , Daniel P. Marrone
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S. A. Stanford Gregory R. Zeimann
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classification 🌌 astro-ph.CO
keywords lensingclustermassrelationweakanalysisgalaxyidcs
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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 $2\sigma$ significance. Fitting a Navarro-Frenk-White mass profile to the shear with a theoretical median mass-concentration relation, we derive a mass $M_{200,\mathrm{crit}}=2.3^{+2.1}_{-1.4}\times10^{14}$ M$_{\odot}$. 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.

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