Sunyaev Zel'dovich Effect Observations of Strong Lensing Galaxy Clusters: Probing the Over-Concentration Problem
Abstract
We have measured the Sunyaev Zel'dovich (SZ) effect for a sample of ten strong lensing selected galaxy clusters using the Sunyaev Zel'dovich Array (SZA). The SZA is sensitive to structures on spatial scales of a few arcminutes, while the strong lensing mass modeling constrains the mass at small scales (typically < 30"). Combining the two provides information about the projected concentrations of the strong lensing clusters. The Einstein radii we measure are twice as large as expected given the masses inferred from SZ scaling relations. A Monte Carlo simulation indicates that a sample randomly drawn from the expected distribution would have a larger median Einstein radius than the observed clusters about 3% of the time. The implied overconcentration has been noted in previous studies with smaller samples of lensing clusters. It persists for this sample, with the caveat that this could result from a systematic effect such as if the gas fractions of the strong lensing clusters are substantially below what is expected.
Keywords
Cite
@article{arxiv.1011.6341,
title = {Sunyaev Zel'dovich Effect Observations of Strong Lensing Galaxy Clusters: Probing the Over-Concentration Problem},
author = {Megan B. Gralla and Keren Sharon and Michael D. Gladders and Daniel P. Marrone and L. Felipe Barrientos and Matthew Bayliss and Massimiliano Bonamente and Esra Bulbul and John E. Carlstrom and Thomas Culverhouse and David G. Gilbank and Christopher Greer and Nicole Hasler and David Hawkins and Ryan Hennessy and Marshall Joy and Benjamin Koester and James Lamb and Erik Leitch and Amber Miller and Tony Mroczkowski and Stephen Muchovej and Masamune Oguri and Tom Plagge and Clem Pryke and David Woody},
journal= {arXiv preprint arXiv:1011.6341},
year = {2015}
}
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