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

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

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

Journal article published in 2015 by C. Chang, V. Vikram, B. Jain, D. Bacon, A. Amara, Mr R. Becker

, G. Bernstein

, C. Bonnett, S. Bridle, D. Brout, M. Busha, J. Frieman, E. Gaztanaga, W. Hartley, M. Jarvis and other authors.

This paper is available in a repository.

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Abstract

We present a mass map reconstructed from weak gravitational lensing shear measurements over 139 deg 2 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.

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

Abstract