Cosmology from large-scale galaxy clustering and galaxy-galaxy lensing with Dark Energy Survey Science Verification data

We present cosmological constraints from the Dark Energy Survey (DES) using a combined analysis of angular clustering of red galaxies and their cross-correlation with weak gravitational lensing of background galaxies. We use a 139 deg(2) contiguous patch of DES data from the Science Verification (SV...

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Detalhes bibliográficos
Autores: Kwan, J., Sanchez, C., Clampitt, J., Blazek, J., Crocce, M., Jain, B., Zuntz, J., Amara, A., Becker, M. R., Bernstein, G. M., Bonnett, C., DeRose, J., Dodelson, S., Eifler, T. F., Gaztanaga, E., Giannantonio, T., Gruen, D., Hartley, W. G., Kacprzak, T., Kirk, D., Krause, E., MacCrann, N., Miquel, R., Park, Y., Ross, A. J., Rozo, E., Rykoff, E. S., Sheldon, E., Troxel, M. A., Wechsler, R. H., Abbott, T. M. C., Abdalla, F. B., Allam, S., Benoit-Levy, A., Brooks, D., Burke, D. L., Rosell, A. Carnero, Kind, M. Carrasco, Cunha, C. E., D'Andrea, C. B., Costa, L. N. da, Desai, S., Diehl, H. T., Dietrich, J. P., Doel, P., Evrard, A. E., Fernandez, E., Finley, D. A., Flaugher, B., Fosalba, P., Frieman, J., Gerdes, D. W., Gruendl, R. A., Gutierrez, G., Honscheid, K., James, D. J., Jarvis, M., Kuehn, K., Lahav, O., Lima, M., Maia, M. A. G., Marshall, J. L., Martini, P., Melchior, P., Mohr, J. J., Nichol, R. C., Nord, B., Plazas, A. A., Reil, K., Romer, A. K., Roodman, A., Sanchez, E., Scarpine, V., Sevilla-Noarbe, I., Smith, R. C., Soares-Santos, M., Sobreira, F. [UNESP], Suchyta, E., Swanson, M. E. C., Tarle, G., Thomas, D., Vikram, V., Walker, A. R., DES Collaboration
Formato: artículo
Estado:Versión publicada
Fecha de publicación:2017
País:Brasil
Recursos:Universidade Estadual Paulista (UNESP)
Repositorio:Repositório Institucional da UNESP
Idioma:inglés
OAI Identifier:oai:repositorio.unesp.br:11449/162453
Acesso em linha:http://dx.doi.org/10.1093/mnras/stw2464
http://hdl.handle.net/11449/162453
Access Level:acceso abierto
Palavra-chave:gravitational lensing: weak
cosmological parameters
large-scale structure of Universe
Descrição
Resumo:We present cosmological constraints from the Dark Energy Survey (DES) using a combined analysis of angular clustering of red galaxies and their cross-correlation with weak gravitational lensing of background galaxies. We use a 139 deg(2) contiguous patch of DES data from the Science Verification (SV) period of observations. Using large-scale measurements, we constrain the matter density of the Universe as Omega(m) = 0.31 +/- 0.09 and the clustering amplitude of the matter power spectrum as sigma(8) = 0.74 +/- 0.13 after marginalizing over seven nuisance parameters and three additional cosmological parameters. This translates into S-8 = sigma(8)(Omega(m)/0.3)(0.16) = 0.74 +/- 0.12 for our fiducial lens redshift bin at 0.35 < z < 0.5, while S-8 = 0.78 +/- 0.09 using two bins over the range 0.2 < z < 0.5. We study the robustness of the results under changes in the data vectors, modelling and systematics treatment, including photometric redshift and shear calibration uncertainties, and find consistency in the derived cosmological parameters. We show that our results are consistent with previous cosmological analyses from DES and other data sets and conclude with a joint analysis of DES angular clustering and galaxy-galaxy lensing with Planck Cosmic Microwave Background data, baryon accoustic oscillations and Supernova Type Ia measurements.

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