Shear-selected clusters from the Deep Lens Survey

Details Shear-selected clusters from the Deep Lens Survey Shear-selected clusters from the Deep Lens Survey

2003-03-17

arxiv.org/abs/astro-ph/0303381v1

Astronomy and Astrophysics

Astrophysics

10 pages LaTeX, 16 figures, talk paper for Clusters of Galaxies: Probes of Cosmological Structure and Galaxy Evolution, Carneg

Scientific paper

Weak gravitational lensing has the potential to select clusters independently of their baryon content, dynamical state, and star formation history. We present steps toward the first shear-selected sample of clusters, from the Deep Lens Survey (DLS), a deep BVRz' imaging survey of 28 square degrees. Cluster redshifts are determined from photometric redshifts of members and from lensing tomography, and in some cases have been confirmed spectroscopically. DLS imaging data are also used to derive mass-to-light ratios, and upcoming Chandra and XMM time will yield X-ray luminosities and temperatures for a subsample of 12 clusters. Thus we can begin to address any baryon or luminous-matter bias which may be present in current optical and X-ray samples. When the DLS is complete, we expect to have a sample of ~ 100 shear-selected clusters from z ~ 0.2-1.

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