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arxiv: 2010.01138 · v1 · pith:3B5LXK2Knew · submitted 2020-10-02 · 🌌 astro-ph.CO

Dark Energy Survey Year 1 Results: Cosmological Constraints from Cluster Abundances, Weak Lensing, and Galaxy Correlations

C. To , E. Krause , E. Rozo , H. Wu , D. Gruen , R. H. Wechsler , T. F. Eifler , E. S. Rykoff
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M. Costanzi M. R. Becker G. M. Bernstein J. Blazek S. Bocquet S. L. Bridle R. Cawthon A. Choi M. Crocce C. Davis J. DeRose A. Drlica-Wagner J. Elvin-Poole X. Fang A. Farahi O. Friedrich M. Gatti E. Gaztanaga T. Giannantonio W. G. Hartley B. Hoyle M. Jarvis N. MacCrann T. McClintock V. Miranda M. E. S. Pereira Y. Park A. Porredon J. Prat M. M. Rau A. J. Ross S. Samuroff C. S\'anchez I. Sevilla-Noarbe E. Sheldon M. A. Troxel T. N. Varga P. Vielzeuf Y. Zhang J. Zuntz T. M. C. Abbott M. Aguena J. Annis S. Avila E. Bertin S. Bhargava D. Brooks D. L. Burke A. Carnero Rosell M. Carrasco Kind J. Carretero C. Chang C. Conselice L. N. da Costa T. M. Davis S. Desai H. T. Diehl J. P. Dietrich S. Everett A. E. Evrard I. Ferrero B. Flaugher P. Fosalba J. Frieman J. Garc\'ia-Bellido R. A. Gruendl G. Gutierrez S. R. Hinton D. L. Hollowood D. Huterer D. J. James T. Jeltema R. Kron K. Kuehn N. Kuropatkin M. Lima M. A. G. Maia J. L. Marshall F. Menanteau R. Miquel R. Morgan J. Muir J. Myles A. Palmese F. Paz-Chinch\'on A. A. Plazas A. K. Romer A. Roodman E. Sanchez B. Santiago V. Scarpine S. Serrano M. Smith E. Suchyta M. E. C. Swanson G. Tarle D. Thomas D. L. Tucker J. Weller W. Wester (DES Collaboration)
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keywords clusterabundancesconstraintscorrelationsgalaxyanalysiscosmologicaldensity
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Combining multiple observational probes is a powerful technique to provide robust and precise constraints on cosmological parameters. In this letter, we present the first joint analysis of cluster abundances and auto/cross correlations of three cosmic tracer fields measured from the first year data of the Dark Energy Survey: galaxy density, weak gravitational lensing shear, and cluster density split by optical richness. From a joint analysis of cluster abundances, three cluster cross-correlations, and auto correlations of galaxy density, we obtain $\Omega_{\rm{m}}=0.305^{+0.055}_{-0.038}$ and $\sigma_8=0.783^{+0.064}_{-0.054}$. This result is consistent with constraints from the DES-Y1 galaxy clustering and weak lensing two-point correlation functions for the flat $\nu\Lambda$CDM model. We thus combine cluster abundances and all two-point correlations from three cosmic tracer fields and find improved constraints on cosmological parameters as well as on the cluster observable--mass scaling relation. This analysis is an important advance in both optical cluster cosmology and multi-probe analyses of upcoming wide imaging surveys.

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