#large-scale structure
33 resultsInflation, Open Universes, and Dark Energy
Anton Chudaykin, Mikhail M. Ivanov, Renata Kallosh +3
The authors analyze how allowing a small negative spatial curvature and/or a time‑varying dark energy equation of state changes the inferred scalar spectral index nₛ from CMB and g…
A study of the large-scale formation in the environment of A3266: Infalling groups, filaments, and a premerger cold front
J. Dietl, A. Veronica, T. H. Reiprich +7
The paper uses eROSITA X‑ray data to map the outskirts of the galaxy cluster Abell 3266, revealing a hot X‑ray filament linking the cluster to a nearby group and showing how the cl…
GGI Lectures on Large-Scale Structure Perturbation Theory (Effective Field Theory)
Mikhail M. Ivanov
These lecture notes introduce non-linear perturbation theory and effective field theory methods for modeling the large-scale distribution of galaxies, targeting undergraduate and e…
J-PAS & FLAMINGO: Cosmic voids and void galaxies in the gravitational landscape of photometric surveys
J. A. Mansour, B. McCarthy, L. J. Liivamägi +34
The paper presents a method that uses a quasi‑gravitational potential field to identify dynamically dominant cosmic voids and their galaxies in photometric surveys like J‑PAS, show…
Shear-kSZ: A New Estimator for the Matter-Electron Power Spectrum from kSZ Tomography and Weak Lensing
Boryana Hadzhiyska
The paper introduces a new estimator that combines kinematic Sunyaev‑Zel'dovich measurements, reconstructed velocity fields, and weak‑lensing maps to directly probe the matter–elec…
An efficient one-loop EFTofLSS framework for Vainshtein-screened Horndeski gravity
Stan Verhoeve, Dani de Boe, Gen Ye +1
The authors extend the PyBird code to compute one-loop matter power spectra for Vainshtein‑screened Horndeski and nDGP gravity using a direct ODE approach for time‑dependent kernel…
Probing Primordial Chirality in the Matter Distribution
Fang-Na Shao, Hao-Ran Yu, Ming-Jie Sheng +2
The authors develop a helicity‑based estimator to detect handedness in the large‑scale matter distribution as a signature of primordial parity violation, test it on simulations wit…
Lyman- forest holography: 3D predictions from 1D measurements
J. Chaves-Montero, A. Font-Ribera, J. Aguilar +68
The paper introduces ForestFlow, an emulator that connects one‑dimensional Lyman‑α forest flux power spectrum measurements to three‑dimensional clustering predictions, enabling com…
Unified dark sector approaches to cosmological tensions
Sergio Sevillano Muñoz, Mark Trodden
The paper analytically studies simple models where a single scalar field varies the mass of dark matter, showing how such models can simultaneously address early- and late-time cos…
Gravitational Waves as a Source of Large-Scale White Noise: New Constraints
Gabriela Barenboim, Albert Stebbins
The paper shows how a stochastic gravitational‑wave background can generate large‑scale white noise in the cosmic density field and uses the lack of observed white noise to place l…
Emulating Cosmic Structure Formation with a Lagrangian Neural Cellular Automaton
Cooper Jacobus, Beatriz Tucci, Oliver Philcox
The paper presents a Lagrangian Neural Cellular Automaton that learns residual corrections to the Zeldovich approximation, providing a fast, differentiable and accurate emulator of…
Probing Parity Violation with Weak Lensing Trispectrum
Sijin Chen, Zhengyangguang Gong, Jiamin Hou
The paper develops a framework to use the weak lensing convergence trispectrum as a probe of cosmological parity violation, deriving projection formulas, evaluating parity‑odd temp…
Weighted Webs: Morphology-Informed Marked Fields
Mikel Martin Barandiaran, Jessica A. Cowell, David Alonso +2
The paper investigates how weighting the cosmic matter density field by morphological characteristics of the cosmic web (such as filamentarity and tidal shear) can enhance constrai…
The FRB--Galaxy Overdensity Cross-Correlation Statistic in Dispersion Space
Ryan Raikman, Haochen Wang, Kiyoshi Masui +1
The paper introduces a new angular cross‑power spectrum statistic that correlates FRB dispersion measures with galaxy density, showing it is more informative than previous methods…
Tracing the Cosmic web across Cosmic time through SKA observations of radio galaxies
Pratik Dabhade, Gianluca Castignani, Mousumi Mahato +4
The paper outlines how the Square Kilometre Array will use observations of radio galaxies to map and study the cosmic web across cosmic time, probing environments from dense cluste…
Probing the large-scale structure with 21cm-galaxy cross-bispectrum: Estimates from simulations and forecasts for upcoming cosmological surveys
Leon Noble, Suman Majumdar, Matteo Viel +7
The paper investigates the 21 cm–galaxy cross‑bispectrum using simulated galaxy evolution models and forecasts its detectability with upcoming Euclid‑like galaxy surveys and SKA‑Mi…
Density reconstruction from biased tracers: Testing the equivalence principle through consistency relations
Lawrence Dam, Omar Darwish
The paper introduces a quadratic‑estimator method that uses the anti‑symmetric modulation of cross‑power spectra between different biased tracers to test the weak equivalence princ…
CAMB v2: cosmological power spectra for high-precision surveys
Antony Lewis
The paper introduces CAMB v2, an updated code that provides fast, high‑precision predictions of lensed CMB and matter power spectra for upcoming surveys, featuring a new treatment…
Enabling Cosmic Web Analysis at Gigaparsec Scales: A Multi Block Approach for DisPerSE
Ankit Singh, Frazer Pearce, Meghan Gray +1
The paper introduces a frozen‑core, multi‑block technique that enables the DisPerSE filament finder to process gigaparsec‑scale cosmological simulations by preserving global topolo…
Sahyadri: A simulation suite for the cosmology dependence of the Cosmic Web
Saee Dhawalikar, Shadab Alam, Aseem Paranjape +1
The paper presents Sahyadri, a high‑resolution cosmological N‑body simulation suite that varies key cosmological parameters to enable precise studies of the low‑redshift Universe a…
The VST ATLAS Survey IV: Galaxy, LRG and QSO bias and HODs via ACT CMB Lensing
Harshnoor Kaur, T. Shanks, S. Bose +1
The paper measures the clustering bias and halo occupation of VST ATLAS galaxies, luminous red galaxies, and quasars by cross‑correlating their distributions with the high‑resoluti…
The Dark Energy Camera All Data Everywhere cosmic shear project V: Constraints on cosmology and astrophysics from 270 million galaxies across 13,000 deg of the sky
D. Anbajagane, C. Chang, A. Drlica-Wagner +78
The paper presents cosmological and astrophysical constraints derived from cosmic shear measurements of 270 million galaxies covering 13,000 deg², combining data from the DECADE pr…
Signatures of Modified Gravity on Linear Scales in a Dynamical Dark Energy Background
Yo Toda, Adrià Gómez-Valent
The paper studies how possible deviations from General Relativity on linear scales influence cosmic structure growth in a universe with dynamical dark energy (CPL model), and uses…
Assessing the large-scale angular clustering of UNIONS Lyman Break Galaxies via cross-correlations
Constantin Payerne, Christophe Yèche, William d'Assignies Doumerg +7
The paper evaluates the use of UNIONS-selected Lyman-break galaxies as tracers of large‑scale structure at high redshift, finding that cross‑correlations with CMB lensing and quasa…