Galaxy clustering in harmonic space from the dark energy survey year 1 data: compatibility with real-space results

Andrade-Oliveira, F. and Desai, S. and et al, . (2021) Galaxy clustering in harmonic space from the dark energy survey year 1 data: compatibility with real-space results. Monthly Notices of the Royal Astronomical Society, 505 (4). pp. 5714-5724. ISSN 00358711 (Submitted)

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Abstract

We perform an analysis in harmonic space of the Dark Energy Survey Year 1 Data (DES-Y1) galaxy clustering photometric data using products obtained for the real-space analysis. We test our pipeline with a suite of lognormal simulations, which are used to validate scale cuts in harmonic space as well as to provide a covariance matrix that takes into account the DES-Y1 mask. We then apply this pipeline to DES-Y1 data taking into account survey property maps derived for the real-space analysis. We compare with real-space DES-Y1 results obtained from a similar pipeline. We show that the harmonic space analysis we develop yields results that are compatible with the real-space analysis for the bias parameters. This verification paves the way to performing a harmonic space analysis for the upcoming DES-Y3 data. © 2021 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society

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