Article
Astronomy & Astrophysics
Samuel Brieden, Hector Gil-Marin, Licia Verde
Summary: This study measures two values of the Hubble expansion rate, H0, based on different physical processes using large-scale structure galaxy data and Big Bang Nucleosynthesis abundances information. The results show good consistency between the two H0 values obtained, which are the tightest sound-horizon free constraints from LSS data to date. Any proposed ACDM extension needs to modify consistently both the sound horizon scale physics and the matter-radiation equality scale to address the so-called Hubble tension.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2023)
Article
Astronomy & Astrophysics
Hector Gil-Marin
Summary: This study reviews different methods of combining cosmological information from the full shape of power spectra, finding that the standard approach of combining at the level of BAO variables is nearly optimal, resulting in improved constraints at a faster speed.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2022)
Article
Astronomy & Astrophysics
Atsushi Taruya, Kazuyuki Akitsu
Summary: This paper introduces a new formalism based on Lagrangian perturbation theory to systematically compute the response of a biased tracer of large-scale structure to super-sample modes. The formalism can reproduce previously derived power spectrum responses and offers an alternative way to compute statistical quantities with super-sample modes.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2021)
Article
Astronomy & Astrophysics
Obinna Umeh
Summary: This study addresses the challenges of computational estimation and high-dimensionality when using the anisotropic three-point correlation function for cosmological parameter inference. By utilizing multipole decompositions to reduce dimensionality, the full expression for the multipole moments and covariance matrix of the anisotropic 3PCF can be derived effectively. Optimal computation of multipole moments and their covariance is demonstrated using the 2D FFTLog formalism, involving integrals over product terms with bispectrum, power spectra, and spherical Bessel functions.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2021)
Article
Astronomy & Astrophysics
Setareh Foroozan, Alex Krolewski, Will J. Percival
Summary: While measurements of Baryonic Acoustic Oscillation (BAO) signal positions align well with Fisher matrix predictions, measurements based on Redshift Space Distortion (RSD) of the growth rate f sigma(8) do not agree with initial predictions. This discrepancy is attributed to degeneracies with geometric parameters and optimistic assumptions about the scale for extracting linear signals. Current data and large-scale modeling techniques have found a consistent signal extraction for k less than or equal to 0.08 h Mpc(-1), regardless of sample properties and covered redshifts.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2021)
Article
Astronomy & Astrophysics
Shi-Fan Chen, Zvonimir Vlah, Martin White
Summary: A new method for analyzing the pre-and post-reconstruction galaxy two-point functions of the BOSS survey is presented. The post-reconstruction correlation function accurately measures the distance-redshift relation and expansion history, while the pre-reconstruction power spectrum multipoles constrain the broad-band shape and rate-of-growth of large-scale structure. The technique uses Lagrangian perturbation theory to directly work with the measured data at the level of two-point functions without approximations. Combining galaxies across the full redshift range and both hemispheres, constraints on Omega(m), H-0, and sigma(8) are obtained that are consistent with the Planck primary CMB anisotropy data and recent cosmic shear surveys.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2022)
Article
Astronomy & Astrophysics
Setareh Foroozan, Elena Massara, Will J. Percival
Summary: The low resolution of slitless spectroscopy may lead to line misidentification in future surveys, requiring correction for contaminants to avoid incorrect cosmological measurements.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2022)
Article
Astronomy & Astrophysics
Matthew McQuinn
Summary: By studying a simplified universe model, it is found that linearized reconstruction produces similar results to the full nonlinear algorithm, indicating that existing reconstruction algorithms can extract most of the accessible information effectively. The effectiveness of reconstruction is influenced by the number of constraints, with linear scales allowing for precision below the shot noise expectation if galaxy Lagrangian displacements are sufficiently constrained.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2021)
Article
Astronomy & Astrophysics
Samuel Brieden, Hector Gil-Marin, Licia Verde
Summary: This study presents a model-agnostic analysis of galaxy and quasar clustering data, providing precise constraints on cosmological parameters and offering important references for the choice of cosmological models.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2022)
Article
Astronomy & Astrophysics
L. Raul Abramo, Joao Vitor Dinarte Ferri, Ian Lucas Tashiro, Arthur Loureiro
Summary: This paper presents a method to predict the constraining power of galaxy surveys using the multi-tracer Fisher matrix based on angular power spectra in the linear regime of structure formation, avoiding the impracticality of deriving the Fisher matrix from numerically evaluated covariance matrices.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2022)
Article
Astronomy & Astrophysics
Emanuele Castorina, Enea Di Dio
Summary: Measurements of galaxy clustering in Fourier space provide insights into the early Universe and the effects of Primordial Non Gaussianities. Relativistic effects can complicate the interpretation of data and may diverge in the Infra-Red. This work calculates the ensemble average of a commonly used Fourier space estimator, considering all general relativistic effects. The study finds that once the individual divergent GR terms are taken into account, there is no Infra-Red sensitivity in the observable. Additionally, the importance of GR effects, including lensing magnification, in interpreting the galaxy power spectrum multipoles is investigated, revealing them to be generally small corrections to the leading redshift space distortions term.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2022)
Article
Astronomy & Astrophysics
Sheean Jolicoeur, Roy Maartens, Eline M. De Weerd, Obinna Umeh, Chris Clarkson, Stefano Camera
Summary: The study investigates the detectability of first-order relativistic effects in future 21cm intensity mapping surveys, finding that the imaginary contribution of the relativistic signal in the bispectrum increases the detection possibility, albeit typically with a lower signal-to-noise compared to Hα galaxy surveys, due to foreground and telescope beam effects.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2021)
Article
Astronomy & Astrophysics
Henry S. Grasshorn Gebhardt, Olivier Dore
Summary: In this paper, a custom eigenbasis adapted to any particular survey geometry is derived to retain all information on the diagonal of the 2-point function. It results in a diagonal 2-point function with simple shot noise and a diagonal covariance matrix in the case of a Gaussian random field. The derived basis is used to construct a 3D spherical Fourier-Bessel power spectrum estimator assuming a survey geometry that is separable in the angular and radial directions.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2022)
Article
Astronomy & Astrophysics
Florian Beutler, Patrick McDonald
Summary: Recent developments in galaxy redshift surveys have led to the proposal of a matrix-based analysis framework for galaxy power spectrum multipoles, providing deconvolved power spectrum results for several datasets. The use of deconvolved power spectrum multipoles allows for a data analysis independent of survey-specific aspects, such as the window function. This alternative analysis method has been shown to yield similar results to standard analysis in the case of the BOSS dataset, with various analysis components and a Python toolbox provided for convenience.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2021)
Article
Astronomy & Astrophysics
Davide Gualdi, Hector Gil-Marin, Licia Verde
Summary: This study conducts a joint analysis of monopole and quadrupoles for power spectrum, bispectrum, and integrated trispectrum from redshift space matter field in N-body simulations. It demonstrates the complementarity of bispectrum and i-trispectrum in constraining key cosmological parameters, providing smaller credible regions compared to traditional power spectrum and bispectrum analyses.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2021)
Article
Astronomy & Astrophysics
Martin White, Rongpu Zhou, Joseph DeRose, Simone Ferraro, Shi-Fan Chen, Nickolas Kokron, Stephen Bailey, David Brooks, Juan Garcia-Bellido, Julien Guy, Klaus Honscheid, Robert Kehoe, Anthony Kremin, Michael Levi, Nathalie Palanque-Delabrouille, Claire Poppett, David Schlegel, Gregory Tarle
Summary: Using luminous red galaxies selected from imaging surveys for targeting by the Dark Energy Spectroscopic Instrument (DESI) in combination with CMB lensing maps from the Planck collaboration, researchers probed the amplitude of large-scale structure over 0.4 <= z <= 1. Their findings suggest a slower growth of structure at low redshift than model predictions, with only modest significance.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2022)
Article
Astronomy & Astrophysics
Azadeh Moradinezhad Dizgah, Farnik Nikakhtar, Garrett K. Keating, Emanuele Castorina
Summary: Line intensity mapping is an emerging technique that has the potential to accurately probe signals at different scales and redshifts. By using simulations and modeling, researchers have been able to accurately predict clustering power and stochastic contributions of intensity fluctuations. Furthermore, this technique shows promise in measuring the baryon acoustic oscillations, which has important implications for cosmological studies in the future.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2022)
Article
Astronomy & Astrophysics
Emanuele Castorina, Enea Di Dio
Summary: Measurements of galaxy clustering in Fourier space provide insights into the early Universe and the effects of Primordial Non Gaussianities. Relativistic effects can complicate the interpretation of data and may diverge in the Infra-Red. This work calculates the ensemble average of a commonly used Fourier space estimator, considering all general relativistic effects. The study finds that once the individual divergent GR terms are taken into account, there is no Infra-Red sensitivity in the observable. Additionally, the importance of GR effects, including lensing magnification, in interpreting the galaxy power spectrum multipoles is investigated, revealing them to be generally small corrections to the leading redshift space distortions term.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2022)
Article
Astronomy & Astrophysics
Shi-Fan Chen, Zvonimir Vlah, Martin White
Summary: A new method for analyzing the pre-and post-reconstruction galaxy two-point functions of the BOSS survey is presented. The post-reconstruction correlation function accurately measures the distance-redshift relation and expansion history, while the pre-reconstruction power spectrum multipoles constrain the broad-band shape and rate-of-growth of large-scale structure. The technique uses Lagrangian perturbation theory to directly work with the measured data at the level of two-point functions without approximations. Combining galaxies across the full redshift range and both hemispheres, constraints on Omega(m), H-0, and sigma(8) are obtained that are consistent with the Planck primary CMB anisotropy data and recent cosmic shear surveys.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2022)
Article
Astronomy & Astrophysics
Joseph DeRose, Shi-Fan Chen, Martin White, Nickolas Kokron
Summary: We use neural networks to accelerate the calculation of power spectra for galaxy clustering and weak gravitational lensing analysis. By constructing neural network-based surrogate models, we achieve high accuracy over a broad range of scales and a computation speed 1000 times faster than traditional methods. The release of these surrogate models will facilitate rapid iteration on analysis settings, which is essential for complex large-scale structure analyses.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2022)
Article
Astronomy & Astrophysics
Zhejie Ding, Chia-Hsun Chuang, Yu Yu, Lehman H. Garrison, Adrian E. Bayer, Yu Feng, Chirag Modi, Daniel J. Eisenstein, Martin White, Andrei Variu, Cheng Zhao, Hanyu Zhang, Jennifer Meneses Rizo, David Brooks, Kyle Dawson, Peter Doel, Enrique Gaztanaga, Robert Kehoe, Alex Krolewski, Martin Landriau, Nathalie Palanque-Delabrouille, Claire Poppett
Summary: DESI aims to map the Universe with a large and precise three-dimensional map, using high-resolution simulations like ABACUSSUMMIT for validation. The CARPool method is proposed for high statistical precision using accurate and approximate simulations, combined with fast quasi-N-body solvers.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
Nickolas Kokron, Joseph DeRose, Shi-Fan Chen, Martin White, Risa H. Wechsler
Summary: This study investigates the stochastic properties of typical red galaxy samples in a controlled numerical environment. Using halo occupation distribution (HOD) modelling and Second-order Hybrid Effective Field Theory (HEFT), the researchers directly measure and compare the stochastic power spectra of these samples, and apply the results in cosmological analyses.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Editorial Material
Astronomy & Astrophysics
Luca Teodori, Kfir Blum, Emanuele Castorina, Marko Simonovic, Yotam Soreq
Summary: In this paper, we discuss the issue of modeling degeneracies in strong lensing measurements of the Hubble parameter H-0. We highlight the importance of considering weak lensing effects associated with different segments of the line of sight, and propose the inclusion of external convergence terms to avoid bias in the inferred value of H-0. We also show that the use of imaging data for multiple strongly-lensed sources cannot fully resolve the mass sheet degeneracy.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2022)
Article
Astronomy & Astrophysics
Nickolas Kokron, Shi-Fan Chen, Martin White, Joseph DeRose, Mark Maus
Summary: Simulations are essential for accurate modeling of observables in galaxy surveys, but can be expensive when a large dynamic range is required. This study presents a method that combines Lagrangian perturbation theory models with N-body simulations to reduce the effects of finite computational volume on the prediction of ensemble average properties in the simulations. By utilizing the correlation between Zel'dovich displacements and the final density field, the method achieves significant reductions in sample variance for power spectrum or correlation function estimation. It has the potential to extend simulations to larger scales and improve measurements of statistics in simulations that are limited to small volumes.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2022)
Article
Astronomy & Astrophysics
Noah Sailer, Shi-Fan Chen, Martin White
Summary: The optical depth tau is an important parameter in cosmology, but it is least well determined. Future reionization experiments using symmetries-based bias expansion could provide tight constraints on tau. These experiments would require measuring anisotropies in the power spectrum on large scales. Ionization evolution models can help in constraining the timing and duration of reionization, and hence tau, through next-generation 21 cm surveys.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2022)
Article
Astronomy & Astrophysics
Kevin Pardede, Federico Rizzo, Matteo Biagetti, Emanuele Castorina, Emiliano Sefusatti, Pierluigi Monaco
Summary: A method to perform exact convolution of the model prediction for bispectrum multipoles in redshift space with the survey window function is presented. By extending a widely applied method for power spectrum convolution to bispectrum and utilizing a 2D-FFTlog algorithm, accurate results are obtained.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2022)
Article
Astronomy & Astrophysics
A. Amon, N. C. Robertson, H. Miyatake, C. Heymans, M. White, J. DeRose, S. Yuan, R. H. Wechsler, T. N. Varga, S. Bocquet, A. Dvornik, S. More, A. J. Ross, H. Hoekstra, A. Alarcon, M. Asgari, J. Blazek, A. Campos, R. Chen, A. Choi, M. Crocce, H. T. Diehl, C. Doux, K. Eckert, J. Elvin-Poole, S. Everett, A. Ferte, M. Gatti, G. Giannini, D. Gruen, R. A. Gruendl, W. G. Hartley, K. Herner, H. Hildebrandt, S. Huang, E. M. Huff, B. Joachimi, S. Lee, N. MacCrann, J. Myles, A. Navarro-Alsina, T. Nishimichi, J. Prat, L. F. Secco, I Sevilla-Noarbe, E. Sheldon, T. Shin, T. Troster, M. A. Troxel, I Tutusaus, A. H. Wright, B. Yin, M. Aguena, S. Allam, J. Annis, D. Bacon, M. Bilicki, D. Brooks, D. L. Burke, A. Carnero Rosell, J. Carretero, F. J. Castander, R. Cawthon, M. Costanzi, L. N. da Costa, M. E. S. Pereira, J. de Jong, J. De Vicente, S. Desai, J. P. Dietrich, P. Doel, I Ferrero, J. Frieman, J. Garcia-Bellido, D. W. Gerdes, J. Gschwend, G. Gutierrez, S. R. Hinton, D. L. Hollowood, K. Honscheid, D. Huterer, A. Kannawadi, K. Kuehn, N. Kuropatkin, O. Lahav, M. Lima, M. A. G. Maia, J. L. Marshall, F. Menanteau, R. Miquel, J. J. Mohr, R. Morgan, J. Muir, F. Paz-Chinchon, A. Pieres, A. A. Plazas Malagon, A. Porredon, M. Rodriguez-Monroy, A. Roodman, E. Sanchez, S. Serrano, H. Shan, E. Suchyta, M. E. C. Swanson, G. Tarle, D. Thomas, C. To, Y. Zhang
Summary: We evaluate the consistency between lensing and clustering by combining measurements from Baryon Oscillation Spectroscopic Survey, DES Year 3, HSC Year 1, and KiDS-1000. Good agreement is found between these lensing data sets. Two fixed cosmologies, Planck and Lensing cosmology, are used to fit the data, and both provide an acceptable fit at large scales. However, uncertainties in baryon feedback and assembly bias hinder the full utilization of small-scale measurements.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
Benjamin Horowitz, Khee-Gan Lee, Metin Ata, Thomas Mueller, Alex Krolewski, J. Xavier Prochaska, Joseph F. F. Hennawi, Martin White, David Schlegel, R. Michael Rich, Peter E. Nugent, Nao Suzuki, Daichi Kashino, Anton M. M. Koekemoer, Brian C. C. Lemaux
Summary: This study presents the second data release of the COSMOS Ly alpha Mapping And Tomography Observations Survey, which uses Lα absorption to study neutral hydrogen in the intergalactic medium. The reconstructed 3D maps reveal the detailed cosmic web consisting of voids, sheets, filaments, and nodes. The data is publicly available for further exploration and qualitative comparisons.
ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
(2022)
Article
Astronomy & Astrophysics
Joseph DeRose, Shi-Fan Chen, Nickolas Kokron, Martin White
Summary: Numerical simulations in cosmology require trade-offs between volume, resolution, and run-time, leading to sample variance in predictions of ensemble-average quantities. We extend the technique of Zel'dovich control variates to reduce the sample variance in measurements of 2-point statistics of biased tracers in redshift space. This allows improved predictions for the clustering of astronomical objects at very modest computational expense.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2023)