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
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
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
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
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
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
Shi-Fan Chen, Zvonimir Vlah, Emanuele Castorina, Martin White
Summary: In this study, a method for computing the one-loop 2-point function of biased tracers in redshift space is presented using Lagrangian perturbation theory, with a full resummation of long-wavelength displacements and velocities. The model accurately predicts the power spectrum and correlation function of halos and mock galaxies, including baryon acoustic oscillation signal damping due to bulk galaxy motions. The study also compares this full resummation approach with other techniques and discusses the computation of resulting expressions numerically for efficient computation.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2021)
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
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
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
Maresuke Shiraishi, Teppei Okumura, Kazuyuki Akitsu
Summary: In this study, the galaxy intrinsic alignment is used to test the cosmic isotropy along with galaxy number density and peculiar velocity. The impacts of isotropy breaking on the configuration-space two-point correlation functions (2PCFs) are analyzed, and it is found that anisotropic distortions appear and have shapes determined by a preferred direction causing the isotropy violation. The study also suggests that the plane parallel (PP) approximation may not be valid in certain cases, and an accurate test for cosmic isotropy requires a formulation of 2PCF that does not rely on this approximation.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2023)
Article
Astronomy & Astrophysics
Byeonghee Yu, Uros Seljak, Yin Li, Sukhdeep Singh
Summary: We present growth of structure constraints from the cosmological analysis of the power spectrum multipoles of SDSS-III BOSS DR12 galaxies. We use a galaxy power spectrum model that decomposes galaxies into halo mass bins and combines perturbation theory and halo model to model halo clustering. By constraining a single parameter f sigma 8 to Planck+BAO prior, we reduce the effects of prior volume and mismodeling. Our analysis yields tight constraints on f sigma 8 and discusses the sensitivity of cosmological parameter estimation to various factors.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2023)
Article
Astronomy & Astrophysics
Shi-Fan Chen, Martin White, Joseph DeRose, Nickolas Kokron
Summary: We propose a formalism for jointly fitting pre-and post-reconstruction redshift-space clustering, baryon acoustic oscillations, and gravitational lensing. We analyze clustering measured by the Baryon Oscillation Spectroscopic Survey in combination with CMB lensing measured by Planck. The results provide valuable constraints on various cosmological parameters.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2022)
Article
Astronomy & Astrophysics
Dan Pryer, Robert E. Smith, Robin Booth, Chris Blake, Alexander Eggemeier, Jon Loveday
Summary: The study derives expressions for the galaxy power spectrum convolved by survey window in real space, considering the geometric lightcone effect for full sky and deep redshift surveys. It investigates the impact of using the standard mean redshift approximation, showing both overall amplitude suppression and scale-dependent error compared to the 'true' spectrum. However, it also demonstrates that accurate approximation to the full model can be achieved by carefully choosing an 'effective fixed-time' within a certain range of scales.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2022)
Article
Astronomy & Astrophysics
Shi-Fan Chen, Zvonimir Vlah, Emanuele Castorina, Martin White
Summary: In this study, a method for computing the one-loop 2-point function of biased tracers in redshift space is presented using Lagrangian perturbation theory, with a full resummation of long-wavelength displacements and velocities. The model accurately predicts the power spectrum and correlation function of halos and mock galaxies, including baryon acoustic oscillation signal damping due to bulk galaxy motions. The study also compares this full resummation approach with other techniques and discusses the computation of resulting expressions numerically for efficient computation.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2021)
Article
Astronomy & Astrophysics
Nickolas Kokron, Joseph DeRose, Shi-Fan Chen, Martin White, Risa H. Wechsler
Summary: The researchers developed a model that combines dark matter dynamics with analytic bias expansion for analyzing the two-point statistics of biased tracers. They demonstrated the accuracy and applicability of their emulation procedure, showing its ability to describe complex tracer samples and fit clustering and lensing statistics effectively. The emulator is shown to be a promising tool for cosmological parameter inference and analysis of data from galaxy surveys.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(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
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
Sultan Hassan, Romeel Dave, Matthew McQuinn, Rachel S. Somerville, Laura C. Keating, Daniel Angles-Alcazar, Francisco Villaescusa-Navarro, David N. Spergel
Summary: Traditional large-scale models of reionization usually use simple deterministic relations between halo mass and luminosity to predict reionization. This study examines the impact of using more detailed models for ionizing sources and finds that the scatter in the relation between dark matter halos and star formation affects the model. However, at the power spectrum level, the ionization morphology remains mostly unchanged regardless of the variability in the number of sources or escape fraction.
ASTROPHYSICAL JOURNAL
(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)
Article
Astronomy & Astrophysics
Shi-Fan Chen, Martin White, Joseph DeRose, Nickolas Kokron
Summary: We propose a formalism for jointly fitting pre-and post-reconstruction redshift-space clustering, baryon acoustic oscillations, and gravitational lensing. We analyze clustering measured by the Baryon Oscillation Spectroscopic Survey in combination with CMB lensing measured by Planck. The results provide valuable constraints on various cosmological parameters.
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
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
Daniel R. Piacitelli, Erik Solhaug, Yakov Faerman, Matthew McQuinn
Summary: Motivated by the development of integral field units (IFUs) on ground telescopes and proposals for ultraviolet-sensitive space telescopes, this research explores the potential of using emission lines to study the circumgalactic medium (CGM) and its relationship to galaxy formation. The study identifies O III 5007 angstrom, N II 6583 angstrom, O v 630 angstrom, and O VI 1032,1038 angstrom as the most promising emission lines for detection. Formulas are provided to simplify the application of these estimates to other samples and scenarios. The study also discusses the detectability of C III 978 angstrom, C IV 1548 angstrom, H alpha, and hydrogen n > 2 Ly-series lines.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
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)