{"article_number":"043529","citation":{"apa":"Yang, X., Kratochvil, J. M., Wang, S., Lim, E. A., Haiman, Z., &#38; May, M. (2011). Cosmological information in weak lensing peaks. <i>Physical Review D</i>. American Physical Society. <a href=\"https://doi.org/10.1103/physrevd.84.043529\">https://doi.org/10.1103/physrevd.84.043529</a>","short":"X. Yang, J.M. Kratochvil, S. Wang, E.A. Lim, Z. Haiman, M. May, Physical Review D 84 (2011).","ama":"Yang X, Kratochvil JM, Wang S, Lim EA, Haiman Z, May M. Cosmological information in weak lensing peaks. <i>Physical Review D</i>. 2011;84(4). doi:<a href=\"https://doi.org/10.1103/physrevd.84.043529\">10.1103/physrevd.84.043529</a>","chicago":"Yang, Xiuyuan, Jan M. Kratochvil, Sheng Wang, Eugene A. Lim, Zoltán Haiman, and Morgan May. “Cosmological Information in Weak Lensing Peaks.” <i>Physical Review D</i>. American Physical Society, 2011. <a href=\"https://doi.org/10.1103/physrevd.84.043529\">https://doi.org/10.1103/physrevd.84.043529</a>.","ieee":"X. Yang, J. M. Kratochvil, S. Wang, E. A. Lim, Z. Haiman, and M. May, “Cosmological information in weak lensing peaks,” <i>Physical Review D</i>, vol. 84, no. 4. American Physical Society, 2011.","ista":"Yang X, Kratochvil JM, Wang S, Lim EA, Haiman Z, May M. 2011. Cosmological information in weak lensing peaks. Physical Review D. 84(4), 043529.","mla":"Yang, Xiuyuan, et al. “Cosmological Information in Weak Lensing Peaks.” <i>Physical Review D</i>, vol. 84, no. 4, 043529, American Physical Society, 2011, doi:<a href=\"https://doi.org/10.1103/physrevd.84.043529\">10.1103/physrevd.84.043529</a>."},"date_updated":"2024-09-25T07:25:48Z","oa_version":"Preprint","publisher":"American Physical Society","type":"journal_article","main_file_link":[{"url":" https://doi.org/10.48550/arXiv.1109.6333","open_access":"1"}],"day":"24","status":"public","language":[{"iso":"eng"}],"issue":"4","article_type":"original","date_published":"2011-08-24T00:00:00Z","author":[{"last_name":"Yang","full_name":"Yang, Xiuyuan","first_name":"Xiuyuan"},{"first_name":"Jan M.","full_name":"Kratochvil, Jan M.","last_name":"Kratochvil"},{"last_name":"Wang","first_name":"Sheng","full_name":"Wang, Sheng"},{"full_name":"Lim, Eugene A.","first_name":"Eugene A.","last_name":"Lim"},{"id":"7c006e8c-cc0d-11ee-8322-cb904ef76f36","last_name":"Haiman","full_name":"Haiman, Zoltán","first_name":"Zoltán"},{"last_name":"May","first_name":"Morgan","full_name":"May, Morgan"}],"user_id":"317138e5-6ab7-11ef-aa6d-ffef3953e345","date_created":"2024-09-06T07:39:00Z","_id":"17661","extern":"1","volume":84,"title":"Cosmological information in weak lensing peaks","intvolume":"        84","publication_status":"published","abstract":[{"text":"Recent studies have shown that the number counts of convergence peaks N(kappa) in weak lensing (WL) maps, expected from large forthcoming surveys, can be a useful probe of cosmology. We follow up on this finding, and use a suite of WL convergence maps, obtained from ray-tracing N-body simulations, to study (i) the physical origin of WL peaks with different heights, and (ii) whether the peaks contain information beyond the convergence power spectrum P_ell. In agreement with earlier work, we find that high peaks (with amplitudes >~ 3.5 sigma, where sigma is the r.m.s. of the convergence kappa) are typically dominated by a single massive halo. In contrast, medium-height peaks (~0.5-1.5 sigma) cannot be attributed to a single collapsed dark matter halo, and are instead created by the projection of multiple (typically, 4-8) halos along the line of sight, and by random galaxy shape noise. Nevertheless, these peaks dominate the sensitivity to the cosmological parameters w, sigma_8, and Omega_m. We find that the peak height distribution and its dependence on cosmology differ significantly from predictions in a Gaussian random field. We directly compute the marginalized errors on w, sigma_8, and Omega_m from the N(kappa) + P_ell combination, including redshift tomography with source galaxies at z_s=1 and z_s=2. We find that the N(kappa) + P_ell combination has approximately twice the cosmological sensitivity compared to P_ell alone. These results demonstrate that N(kappa) contains non-Gaussian information complementary to the power spectrum.","lang":"eng"}],"external_id":{"arxiv":["1109.6333"]},"article_processing_charge":"No","scopus_import":"1","month":"08","quality_controlled":"1","doi":"10.1103/physrevd.84.043529","publication_identifier":{"issn":["1550-7998","1550-2368"]},"year":"2011","publication":"Physical Review D","oa":1}