DOE OSTI · 2998981
Frequentist cosmological constraints from full-shape clustering measurements in DESI DR1
Abstract
We present a frequentist analysis of clustering measurements from Data Release 1 of the Dark Energy Spectroscopic Instrument (DESI) using the standard profile likelihood method. While Bayesian inferences for effective field theory models of galaxy clustering can be highly sensitive to prior choices for extended cosmological models, frequentist inferences are not susceptible to such effects. We compare frequentist and Bayesian constraints for the parameter set {σ 8 , H 0 , Ω m , w 0 , w a } using the full-shape power spectrum multipoles, post-reconstruction baryon acoustic oscillation (BAO) measurements, and external datasets from the CMB and type Ia supernovae measurements. The frequentist confidence intervals are significantly shifted relative to the Bayesian credible intervals for the w 0 w a CDM model, unless supernovae data are included. When DESI full-shape and BAO data are fit jointly, we obtain the following 1σ frequentist confidence intervals for ΛCDM (w 0 w a CDM): σ 8 = 0.863 +0.048 -0.040 , H 0 = 68.96 +0.81 -0.80 km s -1 Mpc -1 , Ω m = 0.3034 ± 0.0110 (σ 8 = 0.782 +0.060 -0.036 , H 0 = 63.7 +4.2 -2.0 km s -1 Mpc -1 , Ω m = 0.378 +0.024 -0.047 , w 0 = -0.16 +0.10 -0.50 , w a = -3.0 +1.7 ), corresponding to 0.8σ, 0.3σ, 0.7σ (2.1σ, 4.1σ, 6.5σ, 6.3σ, 6.6σ) shifts between the maximum likelihood estimate and the Bayesian posterior mean for ΛCDM (w 0 w a CDM) respectively.
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Morawetz, J. [Department of Physics and Astronomy, University of Waterloo, 200 University Ave W, Waterloo, ON N2L 3G1,; Waterloo Centre for Astrophysics, University of Waterloo, 200 University Ave W, Waterloo, ON N2L 3G1,] (ORCID:0009000810341665), Zhang, H. [Department of Physics and Astronomy, University of Waterloo, 200 University Ave W, Waterloo, ON N2L 3G1,; Waterloo Centre for Astrophysics, University of Waterloo, 200 University Ave W, Waterloo, ON N2L 3G1,] (ORCID:0000000168475254), Bonici, M. [Department of Physics and Astronomy, University of Waterloo, 200 University Ave W, Waterloo, ON N2L 3G1,; Waterloo Centre for Astrophysics, University of Waterloo, 200 University Ave W, Waterloo, ON N2L 3G1,; Perimeter Institute for Theoretical Physics, 31 Caroline St. North, Waterloo, ON N2L 2Y5,] (ORCID:000000028430126X), Percival, W.J. [Department of Physics and Astronomy, University of Waterloo, 200 University Ave W, Waterloo, ON N2L 3G1,; Waterloo Centre for Astrophysics, University of Waterloo, 200 University Ave W, Waterloo, ON N2L 3G1,; Perimeter Institute for Theoretical Physics, 31 Caroline St. North, Waterloo, ON N2L 2Y5,] (ORCID:0000000206445727), Crespi, A. [Department of Physics and Astronomy, University of Waterloo, 200 University Ave W, Waterloo, ON N2L 3G1,; Waterloo Centre for Astrophysics, University of Waterloo, 200 University Ave W, Waterloo, ON N2L 3G1,] (ORCID:0009000994370232), Aguilar, J. [Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720,], Ahlen, S. [Department of Physics, Boston University, 590 Commonwealth Avenue, Boston, MA 02215,] (ORCID:0000000160987247), Bianchi, D. [Dipartimento di Fisica “Aldo Pontremoli”, Università degli Studi di Milano, Via Celoria 16, I-20133 Milano,; INAF-Osservatorio Astronomico di Brera, Via Brera 28, 20122 Milano,] (ORCID:0000000197120006), Brooks, D. [Department of Physics & Astronomy, University College London, Gower Street, London, WC1E 6BT,], Castander, F.J. [Institut d'Estudis Espacials de Catalunya (IEEC), c/ Esteve Terradas 1, Edifici RDIT, Campus PMT-UPC, 08860 Castelldefels,; Institute of Space Sciences, ICE-CSIC, Campus UAB, Carrer de Can Magrans s/n, 08913 Bellaterra, Barcelona,] (ORCID:0000000173164573), Claybaugh, T. [Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720,] (ORCID:0000000250246987), Cole, S. [Institute for Computational Cosmology, Department of Physics, Durham University, South Road, Durham DH1 3LE,] (ORCID:0000000259547903), Cuceu, A. [Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720,] (ORCID:0000000221690595), de la Macorra, A. [Instituto de Física, Universidad Nacional Autónoma de México, Circuito de la Investigación Científica, Ciudad Universitaria, Cd. de México C. P. 04510,] (ORCID:0000000217691640), de Mattia, A. [IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette,] (ORCID:0000000309202947), Dey, Biprateep [Department of Astronomy & Astrophysics, University of Toronto, Toronto, ON M5S 3H4,; Department of Physics & Astronomy and Pittsburgh Particle Physics, Astrophysics, and Cosmology Center (PITT PACC), University of Pittsburgh, 3941 O'Hara Street, Pittsburgh, PA 15260,] (ORCID:0000000256657912), Doel, P. [Department of Physics & Astronomy, University College London, Gower Street, London, WC1E 6BT,] (ORCID:0000000263974457), Ferraro, S. [Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720,; University of California, Berkeley, 110 Sproul Hall #5800 Berkeley, CA 94720,] (ORCID:0000000349927854), Font-Ribera, A. [Institut de Física d'Altes Energies (IFAE), The Barcelona Institute of Science and Technology, Edifici Cn, Campus UAB, 08193, Bellaterra (Barcelona),] (ORCID:0000000230337312), Forero-Romero, J.E. [Departamento de Física, Universidad de los Andes, Cra. 1 No. 18A-10, Edificio Ip, CP 111711, Bogotá,; Observatorio Astronómico, Universidad de los Andes, Cra. 1 No. 18A-10, Edificio H, CP 111711 Bogotá,] (ORCID:0000000228903725), Gaztañaga, E. [Institut d'Estudis Espacials de Catalunya (IEEC), c/ Esteve Terradas 1, Edifici RDIT, Campus PMT-UPC, 08860 Castelldefels,; Institute of Space Sciences, ICE-CSIC, Campus UAB, Carrer de Can Magrans s/n, 08913 Bellaterra, Barcelona,; Institute of Cosmology and Gravitation, University of Portsmouth, Dennis Sciama Building, Portsmouth, PO1 3FX,] (ORCID:0000000196320815), Gontcho, S.Gontcho A. [Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720,; Department of Astronomy, University of Virginia, Charlottesville, VA 22904,] (ORCID:000000033142233X), Gutierrez, G. [Fermi National Accelerator Laboratory, PO Box 500, Batavia, IL 60510,] (ORCID:0000000308250517), Hahn, C. [Steward Observatory, University of Arizona, 933 N. Cherry Avenue, Tucson, AZ 85721,] (ORCID:0000000311970902), Honscheid, K. [Center for Cosmology and AstroParticle Physics, The Ohio State University, 191 West Woodruff Avenue, Columbus, OH 43210,; Department of Physics, The Ohio State University, 191 West Woodruff Avenue, Columbus, OH 43210,; The Ohio State University, Columbus, 43210 OH,] (ORCID:0000000265502023), Huterer, D. [Department of Physics, University of Michigan, 450 Church Street, Ann Arbor, MI 48109,; University of Michigan, 500 S. State Street, Ann Arbor, MI 48109,] (ORCID:0000000165580112), Ishak, M. [Department of Physics, The University of Texas at Dallas, 800 W. Campbell Rd., Richardson, TX 75080,] (ORCID:000000026024466X), Joyce, R. [NSF NOIRLab, 950 N. Cherry Ave., Tucson, AZ 85719,] (ORCID:0000000302015241), Kehoe, R. [Department of Physics, Southern Methodist University, 3215 Daniel Avenue, Dallas, TX 75275,] (ORCID:000000027101697X), Kirkby, D. [Department of Physics and Astronomy, University of California, Irvine, 92697,] (ORCID:0000000288285463), Kisner, T. [Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720,] (ORCID:0000000335107134), Lahav, O. [Department of Physics & Astronomy, University College London, Gower Street, London, WC1E 6BT,] (ORCID:0000000211349035), Lambert, A. [Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720,] (ORCID:0009000356582601), Landriau, M. [Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720,] (ORCID:0000000318388528), Le Guillou, L. [Sorbonne Université, CNRS/IN2P3, Laboratoire de Physique Nucléaire et de Hautes Energies (LPNHE), FR-75005 Paris,] (ORCID:0000000171788868), Manera, M. [Institut de Física d'Altes Energies (IFAE), The Barcelona Institute of Science and Technology, Edifici Cn, Campus UAB, 08193, Bellaterra (Barcelona),; Departament de Física, Serra Húnter, Universitat Autònoma de Barcelona, 08193 Bellaterra (Barcelona),] (ORCID:0000000349628934), Miquel, R. [Institut de Física d'Altes Energies (IFAE), The Barcelona Institute of Science and Technology, Edifici Cn, Campus UAB, 08193, Bellaterra (Barcelona),; Institució Catalana de Recerca i Estudis Avançats, Passeig de Lluís Companys, 23, 08010 Barcelona,] (ORCID:0000000266104836), Mueller, E. [Department of Physics and Astronomy, University of Sussex, Brighton BN1 9QH,], Nadathur, S. [Institute of Cosmology and Gravitation, University of Portsmouth, Dennis Sciama Building, Portsmouth, PO1 3FX,] (ORCID:0000000190703102), Newman, J.A. [Department of Physics & Astronomy and Pittsburgh Particle Physics, Astrophysics, and Cosmology Center (PITT PACC), University of Pittsburgh, 3941 O'Hara Street, Pittsburgh, PA 15260,] (ORCID:0000000186842222), Niz, G. [Departamento de Física, DCI-Campus León, Universidad de Guanajuato, Loma del Bosque 103, León, Guanajuato C. P. 37150,; Instituto Avanzado de Cosmología A. C., San Marcos 11 – Atenas 202. Magdalena Contreras. Ciudad de México C. P. 10720,] (ORCID:0000000215448946), Palanque-Delabrouille, N. [Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720,; IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette,] (ORCID:000000033188784X), Prada, F. [Instituto de Astrofísica de Andalucía (CSIC), Glorieta de la Astronomía, s/n, E-18008 Granada,] (ORCID:0000000171458674), Pérez-Ràfols, I. [Departament de Física, EEBE, Universitat Politècnica de Catalunya, c/Eduard Maristany 10, 08930 Barcelona,] (ORCID:0000000169790125), Rossi, G. [Department of Physics and Astronomy, Sejong University, 209 Neungdong-ro, Gwangjin-gu, Seoul 05006,], Samushia, L. [Abastumani Astrophysical Observatory, Tbilisi, GE-0179,; Department of Physics, Kansas State University, 116 Cardwell Hall, Manhattan, KS 66506,; Faculty of Natural Sciences and Medicine, Ilia State University, 0194 Tbilisi,] (ORCID:0000000216095687), Sanchez, E. [CIEMAT, Avenida Complutense 40, E-28040 Madrid,] (ORCID:0000000296468198), Schlegel, D. [Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720,] (ORCID:0000000250425088), Schubnell, M. [Department of Physics, University of Michigan, 450 Church Street, Ann Arbor, MI 48109,; University of Michigan, 500 S. State Street, Ann Arbor, MI 48109,], Silber, J. [Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720,] (ORCID:0000000234610320), Sprayberry, D. [NSF NOIRLab, 950 N. Cherry Ave., Tucson, AZ 85719,] (ORCID:0000000175836441), Tarlé, G. [University of Michigan, 500 S. State Street, Ann Arbor, MI 48109,] (ORCID:0000000317040781), Weaver, B.A. [NSF NOIRLab, 950 N. Cherry Ave., Tucson, AZ 85719,], Zarrouk, P. [Sorbonne Université, CNRS/IN2P3, Laboratoire de Physique Nucléaire et de Hautes Energies (LPNHE), FR-75005 Paris,] (ORCID:0000000273059578), Zhou, R. [Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720,] (ORCID:0000000153814372), Zou, H. [National Astronomical Observatories, Chinese Academy of Sciences, A20 Datun Road, Chaoyang District, Beijing, 100101,] (ORCID:0000000266843997). 2026-08-03. Frequentist cosmological constraints from full-shape clustering measurements in DESI DR1. https://doi.org/10.1088/1475-7516%2F2026%2F08%2F001
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