Clustering of DESI Luminous Red Galaxies selected by thermal Sunyaev-Zeldovich effect detection level from ACT+Planck y map

ORAL

Abstract

We propose to use the thermal Sunyaev-Zeldovich data to separate galaxies from redshift surveys into distinct subpopulations corresponding to different environments and biases. We expect to reach a higher constraining power similarly to density-split and density-marked clustering, but our splitting/marking criterion is independent of spectroscopic galaxy positions and their systematics. We use DESI Y1 spectroscopic data (LRG clustering catalogs) and public ACT DR6 maps. We cross-correlate the LRGs in different ranges of the detection level in the tSZ y map with the full LRG sample. We detect an increase in correlation function monopole with the tSZ detection level between 10 and 80 Mpc/h. We aim to understand the sensitivity to HOD aspects with AbacusSummit cubic boxes. We investigate the possibility of removing the small-scale non-linearities challenging for theoretical modeling by restricting the sample to low tSZ detection levels. We also explore the connection between the tSZ signal-to-noise and the frequency of close galaxy multiplets.

*MR and DJE are supported by U.S. Department of Energy grant DE-SC0013718 and as a Simons Foundation Investigator.This material is based upon work supported by the U.S. Department of Energy (DOE), Office of Science, Office of High-Energy Physics, under Contract No. DE–AC02–05CH11231, and by the National Energy Research Scientific Computing Center, a DOE Office of Science User Facility under the same contract. Additional support for DESI was provided by the U.S. National Science Foundation (NSF), Division of Astronomical Sciences under Contract No. AST-0950945 to the NSF’s National Optical-Infrared Astronomy Research Laboratory; the Science and Technology Facilities Council of the United Kingdom; the Gordon and Betty Moore Foundation; the Heising-Simons Foundation; the French Alternative Energies and Atomic Energy Commission (CEA); the National Council of Humanities, Science and Technology of Mexico (CONAHCYT); the Ministry of Science, Innovation and Universities of Spain (MICIU/AEI/10.13039/501100011033), and by the DESI Member Institutions: ​https://www.desi.lbl.gov/collaborating-institutions. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the U. S. National Science Foundation, the U. S. Department of Energy, or any of the listed funding agencies.The authors are honored to be permitted to conduct scientific research on Iolkam Du’ag (Kitt Peak), a mountain with partic

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Publication: M. Rashkovetskyi, D. Eisenstein, et al, "Clustering of DESI Luminous Red Galaxies selected by thermal Sunyaev-Zeldovich effect detection level from ACT+Planck y map", in preparation

Presenters

  • Michael Rashkovetskyi

    • Center for Astrophysics | Harvard & Smithsonian

Authors

  • Michael Rashkovetskyi

    • Center for Astrophysics | Harvard & Smithsonian

  • Daniel J Eisenstein

    • Center for Astrophysics | Harvard & Smithsonian