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The correlation function and detection of baryon acoustic oscillation peak from the spectroscopic SDSS-GalWCat galaxy cluster catalogue.
- Source :
- Monthly Notices of the Royal Astronomical Society: Letters; Mar2024, Vol. 529 Issue 1, pL54-L59, 6p
- Publication Year :
- 2024
-
Abstract
- We measure the two-point correlation function (CF) of 1357 galaxy clusters with a mass of log<subscript>10</subscript> M <subscript>200</subscript> ≥ 13.6 h <superscript>−1</superscript> M<subscript>⊙</subscript> and at a redshift of z ≤ 0.125. This work differs from previous analyses in that it utilizes a spectroscopic cluster catalogue, |$\tt {SDSS-GalWCat}$| , to measure the CF and detect the baryon acoustic oscillation (BAO) signal. Unlike previous studies which use statistical techniques, we compute covariance errors directly by generating a set of 1086 galaxy cluster light-cones from the GLAM N -body simulation. Fitting the CF with a power-law model of the form ξ(s) = (s / s <subscript>0</subscript>)<superscript>−γ</superscript>, we determine the best-fitting correlation length and power-law index at three mass thresholds. We find that the correlation length increases with increasing the mass threshold while the power-law index is almost constant. For log<subscript>10</subscript> M <subscript>200</subscript> ≥ 13.6 h <superscript>−1</superscript> M<subscript>⊙</subscript>, we find s <subscript>0</subscript> = 14.54 ± 0.87 h <superscript>−1 </superscript>Mpc and γ = 1.97 ± 0.11. We detect the BAO signal at s  = 100 h <superscript>−1</superscript> Mpc with a significance of 1.60σ. Fitting the CF with a Lambda cold dark matter model, we find |$D_\mathrm{V}(z = 0.089)\mathit{r}^{\mathrm{ fid}}_\mathrm{ d}/\mathit{r}_\mathrm{ d} = 267.62 \pm 26$|   h <superscript>−1 </superscript>Mpc, consistent with Planck 2015 cosmology. We present a set of 108 high-fidelity simulated galaxy cluster light-cones from the high-resolution Uchuu N -body simulation, employed for methodological validation. We find D <subscript>V</subscript>(z  = 0.089)/ r <subscript>d</subscript> = 2.666 ± 0.129, indicating that our method does not introduce any bias in the parameter estimation for this small sample of galaxy clusters. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 17453925
- Volume :
- 529
- Issue :
- 1
- Database :
- Complementary Index
- Journal :
- Monthly Notices of the Royal Astronomical Society: Letters
- Publication Type :
- Academic Journal
- Accession number :
- 176131116
- Full Text :
- https://doi.org/10.1093/mnrasl/slad200