Статья

Primordial non-Gaussianity from the completed SDSS-IV extended Baryon Oscillation Spectroscopic Survey II: measurements in Fourier space with optimal weights

Eva-Maria MuellerDepartment of Physics, University of Oxford , Denys Wilkinson Building, Keble Road, Oxford OX1 3RH, UKMehdi RezaieDepartment of Physics and Astronomy, Ohio University , 251B Clippinger Labs, Athens, OH 45701, USAWill J. PercivalDepartment of Physics and Astronomy, University of Waterloo , 200 University Ave W, Waterloo, ON N2L 3G1, CanadaA.J. RossCenter for Cosmology and Astro-Particle Physics, Ohio State University , Columbus, OH 4321, USARossana RuggeriSchool of Mathematics and Physics, University of Queensland , Brisbane, QLD 4072, AustraliaHee‐Jong SeoDepartment of Physics and Astronomy, Ohio University , 251B Clippinger Labs, Athens, OH 45701, USAHéctor Gil-MarínICC, University of Barcelona, IEEC-UB, Martí i Franquès , 1, E-08028 Barcelona, SpainJulian BautistaAix Marseille University , CNRS/IN2P3, CPPM, F-13007 Marseille, FranceJoel R. BrownsteinDepartment of Physics and Astronomy, University of Utah , 115 S. 1400 E., Salt Lake City, UT 84112, USAKyle DawsonDepartment of Physics and Astronomy, University of Utah , 115 S. 1400 E., Salt Lake City, UT 84112, USAAxel de la MacorraInstituto de Física, Universidad Nacional Autónoma de México , Apdo. Postal 20-364, MéxicoN. Palanque‐DelabrouilleIRFU, CEA, Centre d’Etudes Saclay , F-91191 Gif-Sur-Yvette Cedex, FranceGraziano RossiDepartment of Astronomy and Space Science, Sejong University , 209, Neungdong-ro, Gwangjin-gu, Seoul, South KoreaDonald P. SchneiderDepartment of Astronomy and Astrophysics, The Pennsylvania State University ,University Park, PA 16802, USAChristophe YècheIRFU, CEA, Centre d’Etudes Saclay , F-91191 Gif-Sur-Yvette Cedex, France

2022en

ABI

Аннотация

ABSTRACT We present measurements of the local primordial non-Gaussianity parameter $f_{\mathrm{NL}}^\mathrm{local} $from the clustering of 343 708 quasars with redshifts 0.8 &lt; z &lt; 2.2 distributed over 4808 deg2 from the final data release (DR16) of the extended Baryon Acoustic Oscillation Spectroscopic Survey (eBOSS), the largest volume spectroscopic survey up to date. Our analysis is performed in Fourier space, using the power spectrum monopole at very large scales to constrain the scale-dependent halo bias. We demonstrate the robustness of our analysis pipeline with EZ-mock catalogues that simulate the eBOSS DR16 target selection. We carefully assess the impact of systematics on our measurement, exploiting a novel neural network scheme for cleaning the DR16 sample as well as test multiple contamination removal methods. We estimate the bias due to the overcorrection of the systematic removal to be sub-dominant compared to the statistical uncertainty. We find fNL = −12 ± 21 (68 per cent confidence) for the main clustering sample including quasars with redshifts between 0.8 and 2.2, after applying redshift weighting techniques, designed for non-Gaussianity measurement from large scales structure, to optimize our analysis, which improve our results by 37 per cent.

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Идентификаторы

DOI: 10.1093/mnras/stac812

Цитирования и источники

Цитирований: 3Использованных источников: 0

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