A case study for measuring the relativistic dipole of a galaxy cross-correlation with the Dark Energy Spectroscopic Instrument

Article Article scientifique Article A case study for measuring the relativistic dipole of a galaxy cross-correlation with the Dark Energy Spectroscopic Instrument eng 2023-08-25 2023 author Bonvin Camille Geneva U., Dept. Theor. Phys. 602758 Département de physique théorique (FITEO) author Lepori Francesca U. Zurich (main) 885815 author Schulze-Marmeling Sebastian U. Zurich (main) 672249 author Tutusaus Lleixa Isaac IRAP, Toulouse 968269 author Adamek Julian U. Zurich (main) 739534 author Fosalba Pablo Barcelona, IEEC 4611-4627 10.1093/mnras/stad2567 0035-8711 2306.04213 https://academic.oup.com/mnras/article/525/3/4611/7251503 The data on spectroscopic galaxy clustering collected by the Dark Energy Spectroscopic Instrument (DESI) will allow the significant detection of subtle features in the galaxy two-point correlation in redshift space, beyond the ‘standard’ redshift-space distortions. Here, we present an independent assessment of the detectability of the relativistic dipole in the cross-correlation of two populations of galaxies if they would be selected from the Bright Galaxy Survey (BGS) of DESI. We build synthetic galaxy catalogues with the characteristics of the BGS using the light cone of a relativistic N-body simulation. Exploring different ways of splitting the populations of galaxies we find that with an unequal split with more bright galaxies than faint galaxies the detectability is significantly boosted, reaching 19σ in the redshift bin 0.2 ≲ z ≲ 0.3 and expected to be even higher at lower redshift. Moreover, we find that the measured dipole agrees very well with the prediction of relativistic effects from linear theory down to separations of ∼ 30 Mpc h^−1. Methods: data analysis Large-scale structure of Universe Dewey 500.2 European Commission Testing the law of gravity with novel large-scale structure observables 863929 LSSgrav EU H2020 European Commission Latin American Chinese European Galaxy Formation Network 101086388 LACEGAL EU HE 37 Département de physique théorique 133 false Monthly notices of the Royal Astronomical Society 525 3 6f721277-a264-4b68-8b44-3d371a3828ec Article (Published version) Public stad2567.pdf 2990284 application/pdf CC BY-4.0 004ac9e347474a27b65576599b31c7934e1759033b312330cf45150b2d8d341b openAccess Faculté des sciences / Section de physique / Département de physique théorique

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A case study for measuring the relativistic dipole of a galaxy cross-correlation with the Dark Energy Spectroscopic Instrument	Monthly notices of the Royal Astronomical Society			2023	54	80

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Tutusaus Lleixa, Isaac