--- _id: '17666' abstract: - lang: eng text: We have investigated a recently proposed halo-based model, Camelus, for predicting weak-lensing peak counts, and compared its results over a collection of 162 cosmologies with those from N-body simulations. While counts from both models agree for peaks with S/N>1 (where S/N is the ratio of the peak height to the r.m.s. shape noise), we find ≈50% fewer counts for peaks near S/N=0 and significantly higher counts in the negative S/N tail. Adding shape noise reduces the differences to within 20% for all cosmologies. We also found larger covariances that are more sensitive to cosmological parameters. As a result, credibility regions in the {Ωm,σ8} are ≈30% larger. Even though the credible contours are commensurate, each model draws its predictive power from different types of peaks. Low peaks, especially those with 23). Our results confirm the importance of using a cosmology-dependent covariance with at least a 14\% improvement in parameter constraints. We identified the covariance estimation as the main driver behind differences in inference, and suggest possible ways to make Camelus even more useful as a highly accurate peak count emulator. article_number: '083506' article_processing_charge: No article_type: original arxiv: 1 author: - first_name: José Manuel full_name: Zorrilla Matilla, José Manuel last_name: Zorrilla Matilla - first_name: Zoltán full_name: Haiman, Zoltán id: 7c006e8c-cc0d-11ee-8322-cb904ef76f36 last_name: Haiman - first_name: Daniel full_name: Hsu, Daniel last_name: Hsu - first_name: Arushi full_name: Gupta, Arushi last_name: Gupta - first_name: Andrea full_name: Petri, Andrea last_name: Petri citation: ama: Zorrilla Matilla JM, Haiman Z, Hsu D, Gupta A, Petri A. Do dark matter halos explain lensing peaks? Physical Review D. 2016;94(8). doi:10.1103/physrevd.94.083506 apa: Zorrilla Matilla, J. M., Haiman, Z., Hsu, D., Gupta, A., & Petri, A. (2016). Do dark matter halos explain lensing peaks? Physical Review D. American Physical Society. https://doi.org/10.1103/physrevd.94.083506 chicago: Zorrilla Matilla, José Manuel, Zoltán Haiman, Daniel Hsu, Arushi Gupta, and Andrea Petri. “Do Dark Matter Halos Explain Lensing Peaks?” Physical Review D. American Physical Society, 2016. https://doi.org/10.1103/physrevd.94.083506. ieee: J. M. Zorrilla Matilla, Z. Haiman, D. Hsu, A. Gupta, and A. Petri, “Do dark matter halos explain lensing peaks?,” Physical Review D, vol. 94, no. 8. American Physical Society, 2016. ista: Zorrilla Matilla JM, Haiman Z, Hsu D, Gupta A, Petri A. 2016. Do dark matter halos explain lensing peaks? Physical Review D. 94(8), 083506. mla: Zorrilla Matilla, José Manuel, et al. “Do Dark Matter Halos Explain Lensing Peaks?” Physical Review D, vol. 94, no. 8, 083506, American Physical Society, 2016, doi:10.1103/physrevd.94.083506. short: J.M. Zorrilla Matilla, Z. Haiman, D. Hsu, A. Gupta, A. Petri, Physical Review D 94 (2016). date_created: 2024-09-06T07:44:28Z date_published: 2016-10-04T00:00:00Z date_updated: 2024-09-25T07:49:17Z day: '04' doi: 10.1103/physrevd.94.083506 extern: '1' external_id: arxiv: - '1609.03973' intvolume: ' 94' issue: '8' language: - iso: eng main_file_link: - open_access: '1' url: ' https://doi.org/10.48550/arXiv.1609.03973' month: '10' oa: 1 oa_version: Preprint publication: Physical Review D publication_identifier: issn: - 2470-0010 - 2470-0029 publication_status: published publisher: American Physical Society quality_controlled: '1' scopus_import: '1' status: public title: Do dark matter halos explain lensing peaks? type: journal_article user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345 volume: 94 year: '2016' ... --- _id: '17669' abstract: - lang: eng text: 'Unprecedentedly precise cosmic microwave background (CMB) data are expected from ongoing and near-future CMB Stage-III and IV surveys, which will yield reconstructed CMB lensing maps with effective resolution approaching several arcminutes. The small-scale CMB lensing fluctuations receive non-negligible contributions from nonlinear structure in the late-time density field. These fluctuations are not fully characterized by traditional two-point statistics, such as the power spectrum. Here, we use N-body ray-tracing simulations of CMB lensing maps to examine two higher-order statistics: the lensing convergence one-point probability distribution function (PDF) and peak counts. We show that these statistics contain significant information not captured by the two-point function, and provide specific forecasts for the ongoing Stage-III Advanced Atacama Cosmology Telescope (AdvACT) experiment. Considering only the temperature-based reconstruction estimator, we forecast 9σ (PDF) and 6σ (peaks) detections of these statistics with AdvACT. Our simulation pipeline fully accounts for the non-Gaussianity of the lensing reconstruction noise, which is significant and cannot be neglected. Combining the power spectrum, PDF, and peak counts for AdvACT will tighten cosmological constraints in the Ωm-σ8 plane by ≈30%, compared to using the power spectrum alone.' article_number: '103501' article_processing_charge: No article_type: original arxiv: 1 author: - first_name: Jia full_name: Liu, Jia last_name: Liu - first_name: J. Colin full_name: Hill, J. Colin last_name: Hill - first_name: Blake D. full_name: Sherwin, Blake D. last_name: Sherwin - first_name: Andrea full_name: Petri, Andrea last_name: Petri - first_name: Vanessa full_name: Böhm, Vanessa last_name: Böhm - first_name: Zoltán full_name: Haiman, Zoltán id: 7c006e8c-cc0d-11ee-8322-cb904ef76f36 last_name: Haiman citation: ama: 'Liu J, Hill JC, Sherwin BD, Petri A, Böhm V, Haiman Z. CMB lensing beyond the power spectrum: Cosmological constraints from the one-point probability distribution function and peak counts. Physical Review D. 2016;94(10). doi:10.1103/physrevd.94.103501' apa: 'Liu, J., Hill, J. C., Sherwin, B. D., Petri, A., Böhm, V., & Haiman, Z. (2016). CMB lensing beyond the power spectrum: Cosmological constraints from the one-point probability distribution function and peak counts. Physical Review D. American Physical Society. https://doi.org/10.1103/physrevd.94.103501' chicago: 'Liu, Jia, J. Colin Hill, Blake D. Sherwin, Andrea Petri, Vanessa Böhm, and Zoltán Haiman. “CMB Lensing beyond the Power Spectrum: Cosmological Constraints from the One-Point Probability Distribution Function and Peak Counts.” Physical Review D. American Physical Society, 2016. https://doi.org/10.1103/physrevd.94.103501.' ieee: 'J. Liu, J. C. Hill, B. D. Sherwin, A. Petri, V. Böhm, and Z. Haiman, “CMB lensing beyond the power spectrum: Cosmological constraints from the one-point probability distribution function and peak counts,” Physical Review D, vol. 94, no. 10. American Physical Society, 2016.' ista: 'Liu J, Hill JC, Sherwin BD, Petri A, Böhm V, Haiman Z. 2016. CMB lensing beyond the power spectrum: Cosmological constraints from the one-point probability distribution function and peak counts. Physical Review D. 94(10), 103501.' mla: 'Liu, Jia, et al. “CMB Lensing beyond the Power Spectrum: Cosmological Constraints from the One-Point Probability Distribution Function and Peak Counts.” Physical Review D, vol. 94, no. 10, 103501, American Physical Society, 2016, doi:10.1103/physrevd.94.103501.' short: J. Liu, J.C. Hill, B.D. Sherwin, A. Petri, V. Böhm, Z. Haiman, Physical Review D 94 (2016). date_created: 2024-09-06T07:47:04Z date_published: 2016-11-02T00:00:00Z date_updated: 2024-09-25T08:01:19Z day: '02' doi: 10.1103/physrevd.94.103501 extern: '1' external_id: arxiv: - '1608.03169' intvolume: ' 94' issue: '10' language: - iso: eng main_file_link: - open_access: '1' url: ' https://doi.org/10.48550/arXiv.1608.03169' month: '11' oa: 1 oa_version: Preprint publication: Physical Review D publication_identifier: issn: - 2470-0010 - 2470-0029 publication_status: published publisher: American Physical Society quality_controlled: '1' scopus_import: '1' status: public title: 'CMB lensing beyond the power spectrum: Cosmological constraints from the one-point probability distribution function and peak counts' type: journal_article user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345 volume: 94 year: '2016' ...