Analysis of BOSS galaxy data with weighted skew-spectra

Chen, Shu-Fan; Chakraborty, Priyesh; Dvorkin, Cora

doi:10.1088/1475-7516/2024/05/011

Title: Analysis of BOSS galaxy data with weighted skew-spectra

Journal Article · 01 May 2024 · Journal of Cosmology and Astroparticle Physics

DOI: https://doi.org/10.1088/1475-7516/2024/05/011 · OSTI ID:2337923

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Harvard University, Cambridge, MA (United States); Harvard University
Harvard University, Cambridge, MA (United States)

We present the first application of the weighted skew-spectra to analyze non-Gaussian information in galaxy survey data. Using the tree-level galaxy skew-spectra together with the one-loop power spectrum multipoles, we analyze the Sloan Digital Sky Survey (SDSS)-III Baryon Oscillation Spectroscopic Survey (BOSS) galaxy clustering data, and target our search towards the equilateral bispectrum shape of primordial non-Gaussianity. We use the Effective Field Theory model for the galaxy power spectrum and bispectrum, and account for systematic effects, such as the survey geometry. From our likelihood analysis, we find f_NL^equil = -34⁺²⁹⁶_-334 at 68% CL, consistent with previous works, while systematic errors from our treatment of the survey geometry lead to an unreliable estimation of f_NL^ortho. As a result, we further constrain the bias and counterterm parameters, while keeping the cosmology fixed to Planck 2018 values. As a check, we also validate our analysis pipeline using theNseries simulation suite.

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Research Organization:: Harvard University, Cambridge, MA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), High Energy Physics (HEP)

Grant/Contract Number:: SC0013607; SC0020223

OSTI ID:: 2337923

Journal Information:: Journal of Cosmology and Astroparticle Physics, Journal Name: Journal of Cosmology and Astroparticle Physics Journal Issue: 05 Vol. 2024; ISSN 1475-7516

Publisher:: Institute of Physics (IOP)Copyright Statement

Country of Publication:: United States

Language:: English

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cosmological parameters from LSS
galaxy surveys
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redshift surveys

Title: Analysis of BOSS galaxy data with weighted skew-spectra

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