Article

Measuring σ <sub>8</sub> using DESI Legacy Imaging Surveys Emission-Line galaxies and Planck CMB lensing, and the impact of dust on parameter inference

Tanveer KarimData Sciences Institute, University of Toronto, 17th Floor, Ontario Power Building, 700 University Avenue, Toronto, ON, M5G 1Z5, CanadaSukhdeep SinghMcWilliams Center for Cosmology & Astrophysics, Department of Physics, Carnegie Mellon University, Pittsburgh, PA 15213, U.S.AMehdi RezaieDepartment of Physics, Kansas State University, 116 Cardwell Hall, Manhattan, KS 66506, U.S.ADaniel J. EisensteinDepartment of Astronomy, Harvard University, 60 Garden St, Cambridge, MA 02138, U.S.ABoryana HadzhiyskaBerkeley Center for Cosmological Physics, Department of Physics, University of California, Berkeley, CA 94720, U.S.AJoshua S. SpeagleData Sciences Institute, University of Toronto, 17th Floor, Ontario Power Building, 700 University Avenue, Toronto, ON, M5G 1Z5, CanadaJ. AguilarLawrence Berkeley National Laboratory, Berkeley, CA 94720, U.S.AS. AhlenDepartment of Physics, Boston University, 590 Commonwealth Avenue, Boston, MA 02215, U.S.ADavid BrooksDepartment of Physics & Astronomy, University College London, Gower Street, London, WC1E 6BT, U.KT. ClaybaughLawrence Berkeley National Laboratory, Berkeley, CA 94720, U.S.AAxel de la MacorraInstituto de Física, Universidad Nacional Autónoma de México, Cd. de México C.P. 04510, MexicoS. FerraroBerkeley Center for Cosmological Physics, Department of Physics, University of California, Berkeley, CA 94720, U.S.AJ. E. Forero-RomeroDepartamento de Física, Universidad de los Andes, Cra. 1 No. 18A-10, Edificio Ip, CP 111711, Bogotá, ColombiaE. GaztañagaInstitut d'Estudis Espacials de Catalunya (IEEC), 08034 Barcelona, SpainSatya Gontcho A GontchoLawrence Berkeley National Laboratory, Berkeley, CA 94720, U.S.AG. GutiérrezFermi National Accelerator Laboratory, PO Box 500, Batavia, IL 60510, U.S.AJ. GuyLawrence Berkeley National Laboratory, Berkeley, CA 94720, 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.AD. KirkbyDepartment of Physics and Astronomy, University of California, Irvine, 92697, U.S.AAlex KrolewskiDepartment of Physics and Astronomy, University of Waterloo, 200 University Ave W, Waterloo, ON N2L 3G1, CanadaAndrew LambertLawrence Berkeley National Laboratory, Berkeley, CA 94720, U.S.AMartin LandriauLawrence Berkeley National Laboratory, Berkeley, CA 94720, U.S.AM. E. LeviLawrence Berkeley National Laboratory, Berkeley, CA 94720, U.S.AAaron MeisnerNSF NOIRLab, 950 N. Cherry Ave., Tucson, AZ 85719, U.S.AR. 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, Cd. de México C.P. 04510, MexicoAdam D. MyersDepartment of Physics & Astronomy, University of Wyoming, 1000 E. University, Dept. 3905, Laramie, WY 82071, U.S.AGustavo NizDepartamento de Física, Universidad de Guanajuato — DCI, C.P. 37150, Leon, Guanajuato, MexicoN. 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, SpainGraziano RossiDepartment of Physics and Astronomy, Sejong University, Seoul, 143-747, KoreaE. SánchezCIEMAT, Avenida Complutense 40, E-28040 Madrid, SpainEdward F. SchlaflySpace Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, U.S.ADavid J. SchlegelLawrence Berkeley National Laboratory, Berkeley, CA 94720, U.S.AM. SchubnellDepartment of Physics, University of Michigan, Ann Arbor, MI 48109, U.S.ADavid SprayberryNSF NOIRLab, 950 N. Cherry Ave., Tucson, AZ 85719, U.S.AG. TarléUniversity of Michigan, Ann Arbor, MI 48109, U.S.ABenjamin A. WeaverNSF NOIRLab, 950 N. Cherry Ave., Tucson, AZ 85719, U.S.AH. ZouNational Astronomical Observatories, Chinese Academy of Sciences, A20 Datun Rd., Chaoyang District, Beijing, 100012, P.R. China

2025en

ABI

Abstract

Abstract Measuring the growth of structure is a powerful probe for studying the dark sector, especially in light of the σ 8 tension between primary CMB anisotropy and low-redshift surveys. This paper provides a new measurement of the amplitude of the matter power spectrum, σ 8 , using galaxy-galaxy and galaxy-CMB lensing power spectra of Dark Energy Spectroscopic Instrument Legacy Imaging Surveys Emission-Line Galaxies and the Planck 2018 CMB lensing map. We create an ELG catalog composed of 24 million galaxies and with a purity of 85%, covering a redshift range 0 < z < 3, with z mean = 1.09. We implement several novel systematic corrections, such as jointly modeling the contribution of imaging systematics and photometric redshift uncertainties to the covariance matrix. We also study the impacts of various dust maps on cosmological parameter inference. We measure the cross-power spectra over f sky = 0.25 with a signal-to-background ratio of up to 30 σ . We find that the choice of dust maps to account for imaging systematics in estimating the ELG overdensity field has a significant impact on the final estimated values of σ 8 and Ω M , with far-infrared emission-based dust maps preferring σ 8 to be as low as 0.702 ± 0.030, and stellar-reddening-based dust maps preferring as high as 0.719 ± 0.030. The highest preferred value is at ∼ 3 σ tension with the Planck primary anisotropy results. These findings indicate a need for tomographic analyses at high redshifts and joint modeling of systematics.

Identifiers

DOI: 10.1088/1475-7516/2025/02/045

Citations and references

Cited by 30 references

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