Cosmology from cosmic shear with Dark Energy Survey Science Verification data

Journal Article · Wed Jul 06 00:00:00 EDT 2016 · Physical Review D

DOI:https://doi.org/10.1103/PhysRevD.94.022001· OSTI ID:1336144

Abbott, T.; Abdalla, F. B.; Allam, S.; Amara, A.; Annis, J.; Armstrong, R.; Bacon, D.; Banerji, M.; Bauer, A. H.; Baxter, E.; Becker, M. R.; Benoit-Lévy, A.; Bernstein, R. A.; Bernstein, G. M.; Bertin, E.; Blazek, J.; Bonnett, C.; Bridle, S. L.; Brooks, D.; Bruderer, C. ; Buckley-Geer, E.; Burke, D. L.; Busha, M. T.; Capozzi, D.; Carnero Rosell, A.; Carrasco Kind, M.; Carretero, J.; Castander, F. J.; Chang, C.; Clampitt, J.; Crocce, M.; Cunha, C. E.; D’Andrea, C. B.; da Costa, L. N.; Das, R.; DePoy, D. L.; Desai, S.; Diehl, H. T.; Dietrich, J. P.; Dodelson, S.; Doel, P.; Drlica-Wagner, A.; Efstathiou, G.; Eifler, T. F.; Erickson, B.; Estrada, J.; Evrard, A. E.; Fausti Neto, A.; Fernandez, E.; Finley, D. A.; Flaugher, B.; Fosalba, P.; Friedrich, O.; Frieman, J.; Gangkofner, C.; Garcia-Bellido, J.; Gaztanaga, E.; Gerdes, D. W.; Gruen, D.; Gruendl, R. A.; Gutierrez, G.; Hartley, W.; Hirsch, M.; Honscheid, K.; Huff, E. M.; Jain, B.; James, D. J.; Jarvis, M.; Kacprzak, T.; Kent, S.; Kirk, D.; Krause, E.; Kravtsov, A.; Kuehn, K.; Kuropatkin, N.; Kwan, J.; Lahav, O.; Leistedt, B.; Li, T. S.; Lima, M.; Lin, H.; MacCrann, N.; March, M.; Marshall, J. L.; Martini, P.; McMahon, R. G.; Melchior, P.; Miller, C. J.; Miquel, R.; Mohr, J. J.; Neilsen, E.; Nichol, R. C.; Nicola, A.; Nord, B.; Ogando, R.; Palmese, A.; Peiris, H. V.; Plazas, A. A.; Refregier, A.; Roe, N.; Romer, A. K.; Roodman, A.; Rowe, B.; Rykoff, E. S.; Sabiu, C.; Sadeh, I.; Sako, M.; Samuroff, S.; Sanchez, E.; Sánchez, C.; Seo, H.; Sevilla-Noarbe, I.; Sheldon, E.; Smith, R. C.; Soares-Santos, M.; Sobreira, F.; Suchyta, E.; Swanson, M. E. C.; Tarle, G.; Thaler, J.; Thomas, D.; Troxel, M. A.; Vikram, V.; Walker, A. R.; Wechsler, R. H.; Weller, J.; Zhang, Y.; Zuntz, J.

Here, we present the first constraints on cosmology from the Dark Energy Survey (DES), using weak lensing measurements from the preliminary Science Verification (SV) data. We use 139 square degrees of SV data, which is less than 3% of the full DES survey area. Using cosmic shear 2-point measurements over three redshift bins we find σ₈(Ω_m/0.3)^0.5 = 0.81 ± 0.06 (68% confidence), after marginalizing over 7 systematics parameters and 3 other cosmological parameters. We examine the robustness of our results to the choice of data vector and systematics assumed, and find them to be stable. About 20% of our error bar comes from marginalizing over shear and photometric redshift calibration uncertainties. The current state-of-the-art cosmic shear measurements from CFHTLenS are mildly discrepant with the cosmological constraints from Planck CMB data; our results are consistent with both data sets. Our uncertainties are ~30% larger than those from CFHTLenS when we carry out a comparable analysis of the two data sets, which we attribute largely to the lower number density of our shear catalogue. We investigate constraints on dark energy and find that, with this small fraction of the full survey, the DES SV constraints make negligible impact on the Planck constraints. The moderate disagreement between the CFHTLenS and Planck values of σ₈(Ω_m/0.3)^0.5 is present regardless of the value of w.

• Research Organization: Brookhaven National Laboratory (BNL), Upton, NY (United States); Argonne National Laboratory (ANL), Argonne, IL (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States); Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
• Sponsoring Organization: USDOE Office of Science (SC), High Energy Physics (HEP); National Science Foundation (NSF); German Research Foundation (DFG)
• Contributing Organization: The Dark Energy Survey Collaboration; DES
• Grant/Contract Number: SC0012704; AC02-98CH10886; SC0007901; FG02-91ER40690; AC02-07CH11359; AC02-06CH11357; AC02-05CH11231
• OSTI ID: 1336144
• Alternate ID(s): OSTI ID: 1223233; OSTI ID: 1260445; OSTI ID: 1346574; OSTI ID: 1456951
• Report Number(s): BNL-112621-2016-JA; DES-2015-0076; FERMILAB-PUB-15-285-AE; arXiv:1507.05552; PRVDAQ; KA2301020
• Journal Information: Physical Review D, Vol. 94, Issue 2; ISSN 2470-0010
• Publisher: American Physical Society (APS)
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
cosmology: observations
cosmological parameters
gravitational lensing: weak
dark matter
dark energy
large-scale structure of Universe