Wide-Field Lensing Mass Maps from Dark Energy Survey Science Verification Data

C. Chang, V. Vikram, B. Jain, D. Bacon, A. Amara, M. R. Becker, G. Bernstein, C. Bonnett, S. Bridle, D. Brout, M. Busha, J. Frieman, E. Gaztanaga, W. Hartley, M. Jarvis, T. Kacprzak, A. Kovács, O. Lahav, H. Lin, P. MelchiorH. Peiris, E. Rozo, E. Rykoff, C. Sánchez, E. Sheldon, M. A. Troxel, R. Wechsler, J. Zuntz, T. Abbott, F. B. Abdalla, S. Allam, J. Annis, A. H. Bauer, A. Benoit-Lévy, D. Brooks, E. Buckley-Geer, D. L. Burke, D. Capozzi, A. Carnero Rosell, M. Carrasco Kind, F. J. Castander, M. Crocce, C. B. D'Andrea, S. Desai, H. T. Diehl, J. P. Dietrich, P. Doel, T. F. Eifler, A. E. Evrard, A. Fausti Neto, B. Flaugher, P. Fosalba, D. Gruen, R. A. Gruendl, G. Gutierrez, K. Honscheid, D. James, S. Kent, K. Kuehn, N. Kuropatkin, M. A.G. Maia, M. March, P. Martini, K. W. Merritt, C. J. Miller, R. Miquel, E. Neilsen, R. C. Nichol, R. Ogando, A. A. Plazas, A. K. Romer, A. Roodman, M. Sako, E. Sanchez, I. Sevilla, R. C. Smith, M. Soares-Santos, F. Sobreira, E. Suchyta, G. Tarle, J. Thaler, D. Thomas, D. Tucker, A. R. Walker

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34 Citations (Scopus)

Abstract

© 2015 American Physical Society. We present a mass map reconstructed from weak gravitational lensing shear measurements over 139deg2 from the Dark Energy Survey 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 superclusters 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 6.8σ level with 20 arc min smoothing. These measurements are consistent with simulated galaxy catalogs based on N-body simulations from a cold dark matter model with a cosmological constant. This suggests 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.
Original languageEnglish
Article number051301
JournalPhysical Review Letters
Volume115
Issue number5
DOIs
Publication statusPublished - 29 Jul 2015

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