Chang, C;
Vikram, V;
Jain, B;
Bacon, D;
Amara, A;
Becker, MR;
Bernstein, G;
... Walker, AR; + view all
(2015)
Wide-Field Lensing Mass Maps from Dark Energy Survey Science Verification Data.
Physical Review Letters
, 115
, Article 051301. 10.1103/PhysRevLett.115.051301.
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Abstract
We present a mass map reconstructed from weak gravitational lensing shear measurements over 139 deg2 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 6.8 σ 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.
| Type: | Article |
|---|---|
| Title: | Wide-Field Lensing Mass Maps from Dark Energy Survey Science Verification Data |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/PhysRevLett.115.051301 |
| Publisher version: | http://dx.doi.org/10.1103/PhysRevLett.115.051301 |
| Language: | English |
| Additional information: | This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Science & Technology, Physical Sciences, Physics, Multidisciplinary, Physics, SHEAR MEASUREMENT, DATA RELEASE, MATTER, CONSTRAINTS, CFHTLENS, SIMULATIONS, SEXTRACTOR, STATISTICS, COSMOLOGY, REDSHIFTS |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery.ucl.ac.uk/id/eprint/1477974 |
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