Wide-Field Lensing Mass Maps from Dark Energy Survey Science Verification Data
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 also 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. Finally, we summarize our key findings in this Letter; the detailed methodology and tests for systematics are presented in a companion paper.
- Authors:
-
- ETH Zurich (Switzerland). et al.
- Publication Date:
- Research Org.:
- Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States); Brookhaven National Laboratory (BNL), Upton, NY (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- Contributing Org.:
- DES Collaboration
- OSTI Identifier:
- 1223216
- Alternate Identifier(s):
- OSTI ID: 1204703; OSTI ID: 1226043
- Report Number(s):
- FERMILAB-PUB-15-343-AE; BNL-108403-2015-JA
Journal ID: ISSN 0031-9007; arXiv eprint number arXiv:1505.01871
- Grant/Contract Number:
- AC02-07CH11359; SC00112704
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review Letters
- Additional Journal Information:
- Journal Volume: 115; Journal Issue: 5; Journal ID: ISSN 0031-9007
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 79 ASTRONOMY AND ASTROPHYSICS
Citation Formats
Chang, C. Wide-Field Lensing Mass Maps from Dark Energy Survey Science Verification Data. United States: N. p., 2015.
Web. doi:10.1103/PhysRevLett.115.051301.
Chang, C. Wide-Field Lensing Mass Maps from Dark Energy Survey Science Verification Data. United States. https://doi.org/10.1103/PhysRevLett.115.051301
Chang, C. Wed .
"Wide-Field Lensing Mass Maps from Dark Energy Survey Science Verification Data". United States. https://doi.org/10.1103/PhysRevLett.115.051301. https://www.osti.gov/servlets/purl/1223216.
@article{osti_1223216,
title = {Wide-Field Lensing Mass Maps from Dark Energy Survey Science Verification Data},
author = {Chang, C.},
abstractNote = {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 also 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. Finally, we summarize our key findings in this Letter; the detailed methodology and tests for systematics are presented in a companion paper.},
doi = {10.1103/PhysRevLett.115.051301},
journal = {Physical Review Letters},
number = 5,
volume = 115,
place = {United States},
year = {Wed Jul 29 00:00:00 EDT 2015},
month = {Wed Jul 29 00:00:00 EDT 2015}
}
Web of Science
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