Systematic effects on the upcoming NIKA2 LPSZ scaling relation

¹ Université Grenoble Alpes, CNRS, Grenoble INP, LPSC-IN2P3, 38000 Grenoble, France
² Université Côte d’Azur, Observatoire de la Côte d’Azur, CNRS, Laboratoire Lagrange, France
³ School of Physics and Astronomy, Cardiff University, CF24 3AA, UK
⁴ Université Paris-Saclay, Université Paris Cité, CEA, CNRS, AIM, 91191, Gif-sur-Yvette, France
⁵ Max Planck Institute for Extraterrestrial Physics, 85748 Garching, Germany
⁶ INAF, IASF-Milano, Via A. Corti 12, 20133 Milano, Italy
⁷ Aix Marseille Univ, CNRS, CNES, LAM, Marseille, France
⁸ Université Grenoble Alpes, CNRS, Institut Néel, France
⁹ Institut de RadioAstronomie Millimétrique (IRAM), Grenoble, France
¹⁰ Dipartimento di Fisica, Sapienza Università di Roma, I-00185 Roma, Italy
¹¹ Univ. Grenoble Alpes, CNRS, IPAG, 38000 Grenoble, France
¹² Institute for Research in Fundamental Sciences (IPM), Larak Garden, 19395-5531 Tehran, Iran
¹³ Centro de Astrobiología (CSIC-INTA), Torrejón de Ardoz, 28850 Madrid, Spain
¹⁴ National Observatory of Athens, IAASARS, GR-15236, Athens, Greece
¹⁵ Faculty of Physics, University of Athens, GR-15784 Zografos, Athens, Greece
¹⁶ High Energy Physics Division, Argonne National Laboratory, Lemont, IL 60439, USA
¹⁷ Instituto de Radioastronomía Milimétrica (IRAM), Granada, Spain
¹⁸ LERMA, Observatoire de Paris, PSL Research Univ., CNRS, Sorbonne Univ., UPMC, 75014 Paris, France
¹⁹ School of Earth & Space and Department of Physics, Arizona State University, AZ 85287, USA
²⁰ Univ. de Toulouse, UPS-OMP, CNRS, IRAP, 31028 Toulouse, France
²¹ School of Physics and Astronomy, University of Leeds, Leeds LS2 9JT, UK
²² INAF-Osservatorio Astronomico di Cagliari, 09047 Selargius, Italy
²³ LPENS, ENS, PSL Research Univ., CNRS, Sorbonne Univ., Université de Paris, 75005 Paris, France
²⁴ Department of Physics and Astronomy, University of Pennsylvania, PA 19104, USA
²⁵ Institut d’Astrophysique de Paris, CNRS (UMR7095), 75014 Paris, France
²⁶ University of Lyon, UCB Lyon 1, CNRS/IN2P3, IP2I, 69622 Villeurbanne, France

^* e-mail: alice.moyer@lpsc.in2p3.fr

Published online: 28 March 2024

Abstract

In cluster cosmology, cluster masses are the main parameter of interest. They are needed to constrain cosmological parameters through the cluster number count. As the mass is not an observable, a scaling relation is needed to link cluster masses to the integrated Compton parameters Y, i.e. the Sunyaev-Zeldovich observable (SZ). Planck cosmological results obtained with cluster number counts are based on a scaling relation measured with clusters at low redshift (z<0.5) observed in SZ and X-ray. In the SZ Large Program (LPSZ) of the NIKA2 collaboration, the scaling relation will be obtained with a sample of 38 clusters at intermediate to high redshift (0.5 < z < 0.9) and observed at high angular resolution in both SZ and X-ray. Thanks to analytical simulation of LPSZ-like samples, we take into account the LPSZ selection function and correct for its effects. Besides, we show that white and correlated noises in the SZ maps do not affect the scaling relation estimation.