Extracting high-order cosmological information in galaxy surveys with power spectra

Extracting high-order cosmological information in galaxy surveys with power spectra | Research Square window.SnipcartSettings = { analytics: { enabled: false } }; (function() { var accessVector = localStorage.getItem('access_vector') || ''; window.dataLayer = window.dataLayer || []; if (accessVector) { window.dataLayer.push({ user: { profile: { profileInfo: { snid: accessVector } } } }); } })(); (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src='https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);})(window,document,'script','dataLayer','GTM-K279D39R'); Browse Preprints In Review Journals COVID-19 Preprints AJE Video Bytes Research Tools Research Promotion AJE Professional Editing AJE Rubriq About Preprint Platform In Review Editorial Policies Our Team Advisory Board Help Center Sign In Submit a Preprint Cite Share Download PDF Article Extracting high-order cosmological information in galaxy surveys with power spectra Yuting Wang, Gong-Bo Zhao, Kazuya Koyama, Will Percival, Ryuichi Takahashi, and 9 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-1389516/v1 This work is licensed under a CC BY 4.0 License Status: Published Journal Publication published 18 Apr, 2024 Read the published version in Communications Physics → Version 1 posted You are reading this latest preprint version Abstract The "reconstruction" method was proposed more than a decade ago to boost the signal of baryonic acoustic oscillations measured in galaxy redshift surveys, which is one of key probes for dark energy. After moving observed galaxies in galaxy surveys back to their initial position, the reconstructed density field is closer to a linear Gaussian field, with higher-order information moved back into the power spectrum. By combining power spectra measured from the pre- and post-reconstructed galaxy samples, higher-order information beyond the 2-point power spectrum can be efficiently extracted, as power spectra can be measured more quickly than direct measurements of the bispectrum and other higher order functions. This opens a new window to easily use higher-order information when constraining cosmological models. Full Text Additional Declarations There is NO Competing Interest. Cite Share Download PDF Status: Published Journal Publication published 18 Apr, 2024 Read the published version in Communications Physics → Version 1 posted You are reading this latest preprint version Research Square lets you share your work early, gain feedback from the community, and start making changes to your manuscript prior to peer review in a journal. As a division of Research Square Company, we’re committed to making research communication faster, fairer, and more useful. We do this by developing innovative software and high quality services for the global research community. Our growing team is made up of researchers and industry professionals working together to solve the most critical problems facing scientific publishing. Also discoverable on Platform About Our Team In Review Editorial Policies Advisory Board Help Center Resources Author Services Accessibility API Access RSS feed Manage Cookie Preferences © Research Square 2026 | ISSN 2693-5015 (online) Privacy Policy Terms of Service Do Not Sell My Personal Information {"props":{"pageProps":{"initialData":{"identity":"rs-1389516","acceptedTermsAndConditions":true,"allowDirectSubmit":false,"archivedVersions":[],"articleType":"Article","associatedPublications":[],"authors":[{"id":86237026,"identity":"db2d0098-5f78-42dd-a7bd-ab8194a512c8","order_by":0,"name":"Yuting Wang","email":"","orcid":"","institution":"National Astronomy Observatories, Chinese Academy of Science","correspondingAuthor":false,"submittingAuthor":false,"prefix":"","firstName":"Yuting","middleName":"","lastName":"Wang","suffix":""},{"id":86237027,"identity":"68c04226-f271-4cc9-9be7-6223c16fcbb1","order_by":1,"name":"Gong-Bo 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