Cosmological measurements from void-galaxy and galaxy-galaxy clustering in the Sloan Digital Sky Survey

Woodfinden, Alex; Percival, Will J.; Nadathur, Seshadri; Winther, Hans A.; Fraser, T S; Massara, Elena; Paillas, Enrique; Radinović, Slađana

doi:10.1093/mnras/stad1725

Cited by 3 publications

(1 citation statement)

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“…In general, the bound is weaker. Kirshner et al 1981;de Lapparent et al 1986), which already contain cosmological information (Sahlén et al 2016), we are now able to utilize catalogs of hundreds and thousands of voids (Hoyle & Vogeley 2004;Sutter et al 2012aSutter et al , 2014aPan et al 2012;Nadathur 2016;Mao et al 2017b) to perform precision cosmology with void shapes (Sutter et al 2012b(Sutter et al , 2014bHamaus et al 2016Hamaus et al , 2017Hamaus et al , 2020Mao et al 2017a;Nadathur et al 2020;Aubert et al 2022;Woodfinden et al 2023) and sizes (Contarini et al 2023(Contarini et al , 2024.…”

Section: Introductionmentioning

confidence: 99%

Neutrino Mass Constraint from an Implicit Likelihood Analysis of BOSS Voids

Thiele,

Massara,

Pisani

et al. 2024

ApJ

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Cosmic voids identified in the spatial distribution of galaxies provide complementary information to two-point statistics. In particular, constraints on the neutrino mass sum, ∑m ν , promise to benefit from the inclusion of void statistics. We perform inference on the CMASS Northern Galactic Cap sample of the third-generation Sloan Digital Sky Survey/Baryon Oscillation Spectroscopic Survey (BOSS) with the aim of constraining ∑m ν . We utilize the void size function, the void–galaxy cross power spectrum, and the galaxy auto power spectrum. To extract constraints from these summary statistics we use a simulation-based approach, specifically implicit likelihood inference. We populate approximate gravity-only, particle-neutrino cosmological simulations with an expressive halo occupation distribution model. With a conservative scale cut of k max = 0.15 h Mpc − 1 and a Planck-inspired Lambda cold dark matter prior, we find upper bounds on ∑m ν of 0.43 and 0.35 eV from the galaxy auto power spectrum and the full data vector, respectively (95% credible interval). Relaxing the scale cut to k max = 0.2 h Mpc − 1 , we find 0.28 and 0.32 eV. Generally, void statistics appear to add modest but nonzero information beyond the auto power spectrum. We also substantiate the usual assumption that the void size function is Poisson distributed.

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Section: Introductionmentioning

confidence: 99%

Neutrino Mass Constraint from an Implicit Likelihood Analysis of BOSS Voids

Thiele,

Massara,

Pisani

et al. 2024

ApJ

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Mixing bispectrum multipoles under geometric distortions

Khomeriki,

Samushia

2023

Monthly Notices of the Royal Astronomical Society

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We derive general expressions for how the Alcock-Paczynski distortions affect the power spectrum and the bispectrum of cosmological fields. We compute explicit formulas for the mixing coefficients of bispectrum multipoles in the linear approximation. The leading-order effect for the bispectrum is the uniform dilation of all three wavevectors. The mixing coefficients depend on the shape of the bispectrum triplet. Our results for the bispectrum multipoles are framed in terms of the ”natural” basis of the lengths of three wavevectors but can be easily generalized for other bases and reduction schemes. Our validation tests confirm that the linear approximation is extremely accurate for all power spectrum multipoles. The linear approximation is accurate for the bispectrum monopole but results in sub-percent level inaccuracies for the bispectrum quadrupole and fails for the bispectrum hexadecapole. Our results can be used to simplify the analysis of the bispectrum from galaxy surveys, especially the measurement of the Baryon Acoustic Oscillation peak position. They can be used to replace numeric schemes with exact analytic formulae.

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The gravitational lensing imprints of DES Y3 superstructures on the CMB: a matched filtering approach

Demirbozan,

Nadathur,

Ferrero

et al. 2024

Monthly Notices of the Royal Astronomical Society

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Low-density cosmic voids gravitationally lens the cosmic microwave background (CMB), leaving a negative imprint on the CMB convergence $\kappa$. This effect provides insight into the distribution of matter within voids, and can also be used to study the growth of structure. We measure this lensing imprint by cross-correlating the Planck CMB lensing convergence map with voids identified in the Dark Energy Survey Year 3 (DES Y3) data set, covering approximately 4200 deg$^2$ of the sky. We use two distinct void-finding algorithms: a 2D void-finder that operates on the projected galaxy density field in thin redshift shells, and a new code, Voxel, which operates on the full 3D map of galaxy positions. We employ an optimal matched filtering method for cross-correlation, using the Marenostrum Institut de Ciències de l’Espai N-body simulation both to establish the template for the matched filter and to calibrate detection significances. Using the DES Y3 photometric luminous red galaxy sample, we measure $A_\kappa$, the amplitude of the observed lensing signal relative to the simulation template, obtaining $A_\kappa = 1.03 \pm 0.22$ ($4.6\sigma$ significance) for Voxel and $A_\kappa = 1.02 \pm 0.17$ ($5.9\sigma$ significance) for 2D voids, both consistent with Lambda cold dark matter expectations. We additionally invert the 2D void-finding process to identify superclusters in the projected density field, for which we measure $A_\kappa = 0.87 \pm 0.15$ ($5.9\sigma$ significance). The leading source of noise in our measurements is Planck noise, implying that data from the Atacama Cosmology Telescope, South Pole Telescope and CMB-S4 will increase sensitivity and allow for more precise measurements.

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Cosmological measurements from void-galaxy and galaxy-galaxy clustering in the Sloan Digital Sky Survey

Cited by 3 publications

References 50 publications

Neutrino Mass Constraint from an Implicit Likelihood Analysis of BOSS Voids

Neutrino Mass Constraint from an Implicit Likelihood Analysis of BOSS Voids

Mixing bispectrum multipoles under geometric distortions

The gravitational lensing imprints of DES Y3 superstructures on the CMB: a matched filtering approach

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