IDCS J1426.5+3508: Weak Lensing Analysis of a Massive Galaxy Cluster at z = 1.75
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 {M}200,{crit}={2.3}-1.4+2.1× {10}14 M⊙. 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.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- February 2016
- DOI:
- 10.3847/2041-8205/818/2/L25
- arXiv:
- arXiv:1601.07967
- Bibcode:
- 2016ApJ...818L..25M
- Keywords:
-
- cosmology: observations;
- dark matter;
- galaxies: clusters: individual: IDCS J1426.5+3508;
- gravitational lensing: weak;
- Astrophysics - Cosmology and Nongalactic Astrophysics
- E-Print:
- doi:10.3847/2041-8205/818/2/L25