Препринт

Extensive analysis of reconstruction algorithms for DESI 2024 baryon acoustic oscillations

Xinyi ChenPhysics Department, Yale University, P.O. Box 208120, New Haven, CT 06511, U.S.AZ. DingDepartment of Astronomy, School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, ChinaE. PaillasDepartment of Physics and Astronomy, University of Waterloo, 200 University Ave W, Waterloo, ON N2L 3G1, CanadaS. NadathurInstitute of Cosmology and Gravitation, University of Portsmouth, Dennis Sciama Building, Portsmouth, PO1 3FX, U.KHee‐Jong SeoDepartment of Physics & Astronomy, Ohio University, 139 University Terrace, Athens, OH 45701, U.S.AS. ChenInstitute for Advanced Study, 1 Einstein Drive, Princeton, NJ 08540, U.S.ANikhil PadmanabhanPhysics Department, Yale University, P.O. Box 208120, New Haven, CT 06511, U.S.AMartin WhiteDepartment of Physics, University of California, Berkeley, 366 LeConte Hall MC 7300, Berkeley, CA 94720-7300, U.S.AArnaud de MattiaIRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, FranceP. McDonaldLawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720, U.S.AA.J. RossCenter for Cosmology and AstroParticle Physics, The Ohio State University, 191 West Woodruff Avenue, Columbus, OH 43210, U.S.AAndrei VariuInstitute of Physics, Laboratory of Astrophysics, École Polytechnique Fédérale de Lausanne (EPFL), Observatoire de Sauverny, Chemin Pegasi 51, CH-1290 Versoix, SwitzerlandA. Carnero RosellDepartamento de Astrofísica, Universidad de La Laguna (ULL), E-38206, La Laguna, Tenerife, SpainBoryana HadzhiyskaLawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720, U.S.AM. HanifUniversity of Michigan, 500 S. State Street, Ann Arbor, MI 48109, U.S.AD. Forero-SánchezInstitute of Physics, Laboratory of Astrophysics, École Polytechnique Fédérale de Lausanne (EPFL), Observatoire de Sauverny, Chemin Pegasi 51, CH-1290 Versoix, SwitzerlandS. AhlenPhysics Dept., Boston University, 590 Commonwealth Avenue, Boston, MA 02215, U.S.AO. AlvesUniversity of Michigan, 500 S. State Street, Ann Arbor, MI 48109, U.S.AU. AndradeLeinweber Center for Theoretical Physics, University of Michigan, 450 Church Street, Ann Arbor, Michigan 48109-1040, U.S.AS. BenZviDepartment of Physics & Astronomy, University of Rochester, 206 Bausch and Lomb Hall, P.O. Box 270171, Rochester, NY 14627-0171, U.S.ADavide BianchiMilan UDavid J. BrooksDepartment of Physics & Astronomy, University College London, Gower Street, London, WC1E 6BT, U.KE. ChaussidonLawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720, U.S.AT. ClaybaughLawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720, U.S.AAxel de la MacorraInstituto de Física, Universidad Nacional Autónoma de México, Circuito de la Investigación Científica, Ciudad Universitaria, Cd. de México C. P. 04510, MéxicoBiprateep DeyDepartment of Astronomy & Astrophysics, University of Toronto, Toronto, ON M5S 3H4, CanadaK. FanningKIPAC, Menlo ParkS. FerraroLBL, BerkeleyAndreu Font-RiberaDepartment of Physics & Astronomy, University College London, Gower Street, London, WC1E 6BT, U.KJ. E. Forero-RomeroDepartamento de Física, Universidad de los Andes, Cra. 1 No. 18A-10, Edificio Ip, CP 111711, Bogotá, ColombiaC. García-QuinteroCenter for Astrophysics | Harvard & Smithsonian, 60 Garden Street, Cambridge, MA 02138, U.S.AE. GaztañagaInstitut d'Estudis Espacials de Catalunya (IEEC), c/ Esteve Terradas 1, Edifici RDIT, Campus PMT-UPC, 08860 Castelldefels, SpainSatya Gontcho A GontchoLawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720, U.S.AG. GutiérrezFermi National Accelerator Laboratory, PO Box 500, Batavia, IL 60510, U.S.AChang Hoon HahnDepartment of Astrophysical Sciences, Princeton University, Princeton, NJ 08544, U.S.AKlaus HonscheidCenter for Cosmology and AstroParticle Physics, The Ohio State University, 191 West Woodruff Avenue, Columbus, OH 43210, U.S.AS. JuneauNSF NOIRLab, 950 N. Cherry Ave., Tucson, AZ 85719, U.S.AR. KehoeDepartment of Physics, Southern Methodist University, 3215 Daniel Avenue, Dallas, TX 75275, U.S.AD. KirkbyDepartment of Physics and Astronomy, University of California, Irvine, 92697, U.S.ATheodore KisnerLawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720, U.S.AAnthony KreminLawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720, U.S.AM. E. LeviLawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720, U.S.AAaron MeisnerNSF NOIRLab, 950 N. Cherry Ave., Tucson, AZ 85719, U.S.AJ. Mena-FernándezLaboratoire de Physique Subatomique et de Cosmologie, 53 Avenue des Martyrs, 38000 Grenoble, FranceR. MiquelInstitució Catalana de Recerca i Estudis Avançats, Passeig de Lluís Companys, 23, 08010 Barcelona, SpainJohn MoustakasDepartment of Physics and Astronomy, Siena College, 515 Loudon Road, Loudonville, NY 12211, U.S.AA. Muñoz-GutiérrezInstituto de Física, Universidad Nacional Autónoma de México, Circuito de la Investigación Científica, Ciudad Universitaria, Cd. de México C. P. 04510, MéxicoFarnik NikakhtarPhysics Department, Yale University, P.O. Box 208120, New Haven, CT 06511, U.S.AN. Palanque‐DelabrouilleIRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, FranceWill J. PercivalDepartment of Physics and Astronomy, University of Waterloo, 200 University Ave W, Waterloo, ON N2L 3G1, CanadaFrancisco PradaInstituto de Astrofísica de Andalucía (CSIC), Glorieta de la Astronomía, s/n, E-18008 Granada, SpainIgnasi Pérez-RàfolsDepartament de Física, EEBE, Universitat Politècnica de Catalunya, c/Eduard Maristany 10, 08930 Barcelona, SpainM. RashkovetskyiCenter for Astrophysics | Harvard & Smithsonian, 60 Garden Street, Cambridge, MA 02138, U.S.AG. RossiDepartment of Physics and Astronomy, Sejong University, 209 Neungdong-ro, Gwangjin-gu, Seoul 05006, Republic of KoreaRossana RuggeriCentre for Astrophysics & Supercomputing, Swinburne University of Technology, P.O. Box 218, Hawthorn, VIC 3122, AustraliaE. SánchezCIEMAT, Avenida Complutense 40, E-28040 Madrid, SpainChristoph SaulderMax Planck Institute for Extraterrestrial Physics, Gießenbachstraße 1, 85748 Garching, GermanyD. SchlegelLawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720, U.S.AM. SchubnellDepartment of Physics, University of Michigan, 450 Church Street, Ann Arbor, MI 48109, U.S.AJ. A. SmithDavid SprayberryNSF NOIRLab, 950 N. Cherry Ave., Tucson, AZ 85719, U.S.AG. TarléUniversity of Michigan, 500 S. State Street, Ann Arbor, MI 48109, U.S.AD. ValcinDepartment of Physics & Astronomy, Ohio University, 139 University Terrace, Athens, OH 45701, U.S.AM. Vargas-MagañaInstituto de Física, Universidad Nacional Autónoma de México, Circuito de la Investigación Científica, Ciudad Universitaria, Cd. de México C. P. 04510, MéxicoB. A. WeaverNSF NOIRLab, 950 N. Cherry Ave., Tucson, AZ 85719, U.S.ASihan YuanSLAC National Accelerator Laboratory, Menlo Park, CA 94305, U.S.ARongpu ZhouLawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720, U.S.A

Journal of Cosmology and Astroparticle Physicsjournal2026en

ABI

Аннотация

Abstract Reconstruction of the baryon acoustic oscillation (BAO) signal has been a standard procedure in BAO analyses over the past decade and has helped to improve the BAO parameter precision by a factor of ∼2 on average. The Dark Energy Spectroscopic Instrument (DESI) BAO analysis for the first year (DR1) data uses the “standard” reconstruction framework, in which the displacement field is estimated from the observed density field by solving the linearized continuity equation in redshift space, and galaxy and random positions are shifted in order to partially remove non-linearities. There are several approaches to solving for the displacement field in real survey data, including the multigrid (MG), iterative Fast Fourier Transform (iFFT), and iterative Fast Fourier Transform particle (iFFTP) algorithms. In this work, we analyze these algorithms and compare them with various metrics including two-point statistics and the displacement itself using realistic DESI mocks. We focus on three representative DESI samples, the emission line galaxies (ELG), quasars (QSO), and the bright galaxy sample (BGS), which cover the extreme redshifts and number densities, and potential wide-angle effects. We conclude that the MG and iFFT algorithms agree within 0.4% in post-reconstruction power spectrum on BAO scales with the RecSym convention, which does not remove large-scale redshift space distortions (RSDs), in all three tracers. The RecSym convention appears to be less sensitive to displacement errors than the RecIso convention, which attempts to remove large-scale RSDs. However, iFFTP deviates from the first two; thus, we recommend against using iFFTP without further development. In addition, we provide the optimal settings for reconstruction for five years of DESI observation. The analyses presented in this work pave the way for DESI DR1 analysis as well as future BAO analyses.

Темы

Galaxies: Formation, Evolution, Phenomena Cosmology and Gravitation Theories Pulsars and Gravitational Waves Research

Идентификаторы

DOI: 10.1088/1475-7516/2026/05/001

Цитирования и источники

Цитирований: 0Использованных источников: 0

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