Galaxy and halo angular clustering in ΛCDM and modified gravity cosmologies

Paweł Drozda, Wojciech A. Hellwing, and Maciej Bilicki
Phys. Rev. D 106, 043513 – Published 5 August 2022

Abstract

Using a suite of N-body simulations, we study the angular clustering of galaxies, halos, and dark matter in Λ cold dark matter and modified gravity (MG) scenarios. We consider two general categories of such MG models, one is the f(R) gravity, and the other is the normal branch of the Dvali-Gabadadze-Porrati brane world. To measure angular clustering we construct a set of observer-frame light cones and resulting mock sky catalogs. We focus on the area-averaged angular correlation functions WJ, and the associated reduced cumulants SJWJ/W2(J1), and robustly measure them up to the ninth order using counts in cells. We find that 0.15<z<0.3 is the optimal redshift range to maximize the MG signal in our light cones. Analyzing various scales for the two types of statistics, we identify up to 20% relative departures in MG measurements from general relativity (GR), with varying signal significance. For the case of halos and galaxies, we find that third-order statistics offer the most sensitive probe of the different structure formation scenarios, with both W3 and the reduced skewness S3 reaching from 2σ to 4σ significance at angular scales θ0.13°. The MG clustering of the smooth dark matter field is characterized by even stronger deviations (5σ) from GR, albeit at a bit smaller scales of θ0.08°, where baryonic physics is already important. Finally, we stress that our mock halo and galaxy catalogs are characterized by rather low surface number densities when compared to existing and forthcoming state-of-the-art photometric surveys. This opens up exciting potential for testing GR and MG using angular clustering in future applications, with even higher precision and significance than reported here.

  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
1 More
  • Received 13 April 2022
  • Accepted 21 June 2022
  • Corrected 17 August 2022

DOI:https://doi.org/10.1103/PhysRevD.106.043513

© 2022 American Physical Society

Physics Subject Headings (PhySH)

Gravitation, Cosmology & Astrophysics

Corrections

17 August 2022

Correction: The affiliation and the name in the first sentence of the Acknowledgments contained misspellings and have been set right.

Authors & Affiliations

Paweł Drozda*, Wojciech A. Hellwing, and Maciej Bilicki

  • Center for Theoretical Physics, Polish Academy of Sciences, Aleja Lotników 32/46, 02-668 Warsaw, Poland

  • *pdrozda@cft.edu.pl
  • hellwing@cft.edu.pl
  • bilicki@cft.edu.pl

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 106, Iss. 4 — 15 August 2022

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review D

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×