Baryon acoustic oscillation theory and modelling systematics for the DESI 2024 results
Shi-Fan ChenInstitute for Advanced Study , 1 Einstein Drive, Princeton, NJ 08540 , USACullan HowlettSchool of Mathematics and Physics, The University of Queensland , Brisbane, QLD 4072 , AustraliaMartin WhiteDepartment of Physics, University of California, Berkeley , 366 LeConte Hall MC 7300, Berkeley, CA 94720-7300 , USAPeter McDonaldLawrence Berkeley National Laboratory , 1 Cyclotron Road, Berkeley, CA 94720 , USAA.J. RossCenter for Cosmology and AstroParticle Physics, The Ohio State University , 191 West Woodruff Avenue, Columbus, OH 43210 , USAHee‐Jong SeoDepartment of Physics and Astronomy, Ohio University , Athens, OH 45701 , USANikhil PadmanabhanPhysics Department, Yale University , PO Box 208120, New Haven, CT 06511 , USAJ. AguilarLawrence Berkeley National Laboratory , 1 Cyclotron Road, Berkeley, CA 94720 , USAS. AhlenPhysics Department, Boston University , 590 Commonwealth Avenue, Boston, MA 02215 , USAShadab AlamDepartment of Theoretical Physics, Tata Institute of Fundamental Research, Homi Bhabha Road , Mumbai 400005 , IndiaO. AlvesDepartment of Physics, University of Michigan , Ann Arbor, MI 48109 , USAU. AndradeDepartment of Physics, University of Michigan , Ann Arbor, MI 48109 , USARobert BlumNSF NOIRLab , 950 N. Cherry Ave., Tucson, AZ 85719 , USADavid BrooksDepartment of Physics and Astronomy, University College London , Gower Street, London, WC1E 6BT , UKXinyi ChenPhysics Department, Yale University , PO Box 208120, New Haven, CT 06511 , USAShaun ColeInstitute for Computational Cosmology, Department of Physics, Durham University , South Road, Durham DH1 3LE , UKKyle DawsonDepartment of Physics and Astronomy, The University of Utah , 115 South 1400 East, Salt Lake City, UT 84112 , USAA de la MacorraInstituto de Física, Universidad Nacional Autónoma de México , Cd. de México C.P. 04510 , MéxicoArjun DeyNSF NOIRLab , 950 N. Cherry Ave., Tucson, AZ 85719 , USAZ. DingDepartment of Astronomy, School of Physics and Astronomy, Shanghai Jiao Tong University , Shanghai 200240 , ChinaP DoelDepartment of Physics and Astronomy, University College London , Gower Street, London, WC1E 6BT , UKS. FerraroBerkeley Center for Cosmological Physics, Department of Physics, University of California , Berkeley, 110 Sproul Hall 5800 Berkeley, CA 94720 , USAAndreu Font-RiberaDepartment of Physics and Astronomy, University College London , Gower Street, London, WC1E 6BT , UKD. Forero-SánchezInstitute of Physics, Laboratory of Astrophysics, Ecole Polytechnique Fédérale de Lausanne , CH-1015 Lausanne , SwitzerlandJ. 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 and Smithsonian , 60 Garden Street, Cambridge, MA 02138 , USAE. GaztañagaInstitut d’Estudis Espacials de Catalunya (IEEC) , E-08034 Barcelona , SpainSatya Gontcho A GontchoLawrence Berkeley National Laboratory , 1 Cyclotron Road, Berkeley, CA 94720 , USAM. HanifDepartment of Physics, University of Michigan , Ann Arbor, MI 48109 , USAK HonscheidCenter for Cosmology and AstroParticle Physics, The Ohio State University , 191 West Woodruff Avenue, Columbus, OH 43210 , USATheodore KisnerLawrence Berkeley National Laboratory , 1 Cyclotron Road, Berkeley, CA 94720 , USAA KreminLawrence Berkeley National Laboratory , 1 Cyclotron Road, Berkeley, CA 94720 , USAAndrew LambertLawrence Berkeley National Laboratory , 1 Cyclotron Road, Berkeley, CA 94720 , USAMartin LandriauLawrence Berkeley National Laboratory , 1 Cyclotron Road, Berkeley, CA 94720 , USAM. E. LeviLawrence Berkeley National Laboratory , 1 Cyclotron Road, Berkeley, CA 94720 , USAMarc ManeraDepartament de Física, Serra Húnter, Universitat Autònoma de Barcelona , E-08193 Bellaterra (Barcelona), SpainAaron MeisnerNSF NOIRLab , 950 N. Cherry Ave., Tucson, AZ 85719 , USAJ. Mena-FernándezLaboratoire de Physique Subatomique et de Cosmologie , 53 Avenue des Martyrs, F-38000 Grenoble , FranceR MiquelInstitució Catalana de Recerca i Estudis Avançats, Passeig de Lluís Companys , 23, E-08010 Barcelona , SpainA. Muñoz-GutiérrezInstituto de Física, Universidad Nacional Autónoma de México , Cd. de México C.P. 04510 , MéxicoE. PaillasDepartment of Physics and Astronomy, University of Waterloo , 200 University Ave W, Waterloo, ON N2L 3G1 , CanadaN. Palanque‐DelabrouilleCEA Paris-SaclayWill J. PercivalDepartment of Physics and Astronomy, University of Waterloo , 200 University Ave W, Waterloo, ON N2L 3G1 , CanadaA Pérez-FernándezInstituto de Física, Universidad Nacional Autónoma de México , Cd. de México C.P. 04510 , MéxicoFrancisco PradaInstituto de Astrofísica de Andalucía (CSIC), Glorieta de la Astronomía , s/n, E-18008 Granada , SpainM. RashkovetskyiCenter for Astrophysics | Harvard and Smithsonian , 60 Garden Street, Cambridge, MA 02138 , USAMehdi RezaieDepartment of Physics, Kansas State University , 116 Cardwell Hall, Manhattan, KS 66506 , USAA Rosado-MarinDepartment of Physics and Astronomy, Ohio University , Athens, OH 45701 , USAG RossiDepartment of Physics and Astronomy, Sejong University , Seoul 143-747 , KoreaRossana RuggeriCentre for Astrophysics and Supercomputing, Swinburne University of Technology , P.O. Box 218, Hawthorn, VIC 3122 , AustraliaE. SánchezCIEMAT, Avenida Complutense 40 , E-28040 Madrid , SpainDavid J. SchlegelLawrence Berkeley National Laboratory , 1 Cyclotron Road, Berkeley, CA 94720 , USAJ. SilberLawrence Berkeley National Laboratory , 1 Cyclotron Road, Berkeley, CA 94720 , USAG. TarléDepartment of Physics, University of Michigan , Ann Arbor, MI 48109 , USAM. Vargas-MagañaInstituto de Física, Universidad Nacional Autónoma de México , Cd. de México C.P. 04510 , MéxicoB. A. WeaverNSF NOIRLab , 950 N. Cherry Ave., Tucson, AZ 85719 , USAJiaxi YuInstitute of Physics, Laboratory of Astrophysics, Ecole Polytechnique Fédérale de Lausanne , CH-1015 Lausanne , SwitzerlandSihan YuanSLAC National Accelerator Laboratory , Menlo Park, CA 94305 , USARongpu ZhouLawrence Berkeley National Laboratory , 1 Cyclotron Road, Berkeley, CA 94720 , USAZhimin ZhouNational Astronomical Observatories, Chinese Academy of Sciences , A20 Datun Rd., Chaoyang District, Beijing, 100012 , PR China
2024en
ABI
Аннотация
ABSTRACT This paper provides a comprehensive overview of how fitting of baryon acoustic oscillations (BAO) is carried out within the upcoming Dark Energy Spectroscopic Instrument’s (DESI) 2024 results using its DR1 data set, and the associated systematic error budget from theory and modelling of the BAO. We derive new results showing how non-linearities in the clustering of galaxies can cause potential biases in measurements of the isotropic ($\alpha _{\mathrm{iso}}$) and anisotropic ($\alpha _{\mathrm{ap}}$) BAO distance scales, and how these can be effectively removed with an appropriate choice of reconstruction algorithm. We then demonstrate how theory leads to a clear choice for how to model the BAO and develop, implement, and validate a new model for the remaining smooth-broad-band (i.e. without BAO) component of the galaxy clustering. Finally, we explore the impact of all remaining modelling choices on the BAO constraints from DESI using a suite of high-precision simulations, arriving at a set of best practices for DESI BAO fits, and an associated theory and modelling systematic error. Overall, our results demonstrate the remarkable robustness of the BAO to all our modelling choices and motivate a combined theory and modelling systematic error contribution to the post-reconstruction DESI BAO measurements of no more than 0.1 per cent (0.2 per cent) for its isotropic (anisotropic) distance measurements. We expect the theory and best practices laid out to here to be applicable to other BAO experiments in the era of DESI and beyond.
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