Wide-Field Lensing Mass Maps from DES Science Verification Data
Abstract
We present a mass map reconstructed from weak gravitational lensing shear measurements over 139 sq. deg from the Dark Energy Survey (DES) Science Verification data. The mass map probes both luminous and dark matter, thus providing a tool for studying cosmology. We find good agreement between the mass map and the distribution of massive galaxy clusters identified using a red-sequence cluster finder. Potential candidates for super-clusters and voids are identified using these maps. We measure the cross-correlation between the mass map and a magnitude-limited foreground galaxy sample and find a detection at the 5-7 sigma level on a large range of scales. These measurements are consistent with simulated galaxy catalogs based on LCDM N-body simulations, suggesting low systematics uncertainties in the map. We summarize our key findings in this letter; the detailed methodology and tests for systematics are presented in a companion paper.
Keywords
Cite
@article{arxiv.1505.01871,
title = {Wide-Field Lensing Mass Maps from DES Science Verification Data},
author = {C. Chang and V. Vikram and B. Jain and D. Bacon and A. Amara and M. R. Becker and G. Bernstein and C. Bonnett and S. Bridle and D. Brout and M. Busha and J. Frieman and E. Gaztanaga and W. Hartley and M. Jarvis and T. Kacprzak and A. Kovacs and O. Lahav and H. Lin and P. Melchior and H. Peiris and E. Rozo and E. Rykoff and C. Sanchez and E. Sheldon and M. A. Troxel and R. Wechsler and J. Zuntz and T. Abbott and F. B. Abdalla and S. Allam and J. Annis and A. H. Bauer and A. Benoit-Levy and D. Brooks and E. Buckley-Geer and D. L. Burke and D. Capozzi and A. Carnero Rosell and M. Carrasco Kind and F. J. Castander and M. Crocce and C. B. D'Andrea and S. Desai and H. T. Diehl and J. P. Dietrich and P. Doel and T. F. Eifler and A. E. Evrard and A. Fausti Neto and B. Flaugher and P. Fosalba and D. Gruen and R. A. Gruendl and G. Gutierrez and K. Honscheid and D. James and S. Kent and K. Kuehn and N. Kuropatkin and M. A. G. Maia and M. March and P. Martini and K. W. Merritt and C. J. Miller and R. Miquel and E. Neilsen and R. C. Nichol and R. Ogando and A. A. Plazas and A. K. Romer and A. Roodman and M. Sako and E. Sanchez and I. Sevilla and R. C. Smith and M. Soares-Santos and F. Sobreira and E. Suchyta and G. Tarle and J. Thaler and D. Thomas and D. Tucker and A. R. Walker},
journal= {arXiv preprint arXiv:1505.01871},
year = {2015}
}
Comments
7 pages, 3 figures, 1 table; accepted to PRL