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1,078 papers · 1 filter

astro-ph.CO2026★ 1 cited

VENUS: Strong-lensing model of MACS J1931.8-2635 -- revealing the farthest multiply imaged supernova

Joseph F. V. Allingham, Adi Zitrin, Vasily Kokorev +42

We present a parametric strong-lensing model for the galaxy cluster MACS J1931.8-2635 (), accompanying the detection of the spectroscopically confirmed SN Eos at $z = 5…

astro-ph.CO2026

Adding electromagnetic birefringence to pulsar timing and astrometry to detect gravitational waves

Keisuke Inomata, Marc Kamionkowski

It was recently shown that the time variation of the polarization of electromagnetic waves from pulsars can be used, in cross-correlation with pulsar timing, to probe the chirality…

astro-ph.CO2025

Characterizing the Roman Grism Redshift Efficiency of Type Ia Supernova Host Galaxies for the High-Latitude Time-Domain Survey

R. C. Chen, Z. Guo, D. Scolnic +8

The High-Latitude Time-Domain Survey (HLTDS) for the Nancy Grace Roman Space Telescope (Roman) will discover thousands of high redshift Type Ia supernovae (SNeIa) to make generatio…

astro-ph.CO2025★ 1 cited

SN 2025ogs: A Spectroscopically-Normal Type Ia Supernova at z = 2 as a Benchmark for Redshift Evolution

M. R. Siebert, J. D. R. Pierel, M. Engesser +20

The Nancy Grace Roman Space Telescope will provide a revolutionary measurement of the Universe's expansion kinematics, driven by dark matter and dark energy, out to .…

astro-ph.CO2025★ 7 cited

Primordial Black-Hole-Based Pathways to Little Red Dots

Valerio De Luca, Loris Del Grosso, Gabriele Franciolini +4

The James Webb Space Telescope has uncovered a population of compact, high-redshift sources, the Little Red Dots (LRDs), which may host supermassive black holes (BHs) significantly…

astro-ph.CO2025

Estimating the triaxiality of massive clusters from 2D observables in MillenniumTNG with machine learning

Ana Maria Delgado, Michelle Ntampaka, Sownak Bose +7

Properties of massive galaxy clusters, such as mass abundance and concentration, are sensitive to cosmology, making cluster statistics a powerful tool for cosmological studies. How…

astro-ph.CO2025★ 38 cited

The Local Distance Network: a community consensus report on the measurement of the Hubble constant at 1% precision

H0DN Collaboration, Stefano Casertano, Gagandeep Anand +35

The direct, empirical determination of the local value of the Hubble constant (H0) has markedly advanced thanks to improved instrumentation, measurement techniques, and distance es…

astro-ph.CO2025

Symbolic Emulators for Cosmology: Accelerating Cosmological Analyses Without Sacrificing Precision

Deaglan J. Bartlett, Shivam Pandey

In cosmology, emulators play a crucial role by providing fast and accurate predictions of complex physical models, enabling efficient exploration of high-dimensional parameter spac…

astro-ph.CO2025

Hierarchical summaries for primordial non-Gaussianities

M. S. Cagliari, A. Bairagi, B. Wandelt

The advent of Stage IV galaxy redshift surveys such as DESI and Euclid marks the beginning of an era of precision cosmology, with one key objective being the detection of primordia…

astro-ph.CO2025

A Novel kinetic Sunyaev-Zel'dovich Estimator for Electron-Electron Correlations

Neha Anil Kumar, Mesut Çalışkan, Selim C. Hotinli +2

Recent advancements in small-scale observations of the cosmic microwave background (CMB) have provided a unique opportunity to characterize the distribution of baryons in the outsk…

astro-ph.CO2025

DESI Strong Lens Foundry III: Keck Spectroscopy for Strong Lenses Discovered Using Residual Neural Networks

Shrihan Agarwal, Xiaosheng Huang, William Sheu +49

We present spectroscopic data of strong lenses and their source galaxies using the Keck Near-Infrared Echellette Spectrometer (NIRES) and the Dark Energy Spectroscopic Instrument (…

astro-ph.CO2025★ 3 cited

Nearly Full-Sky Low-Multipole Cosmic Microwave Background Temperature Anisotropy: III. CMB Temperature Anomalies

Laura Herold, Graeme E. Addison, Charles L. Bennett +2

Unexpected features have been observed in the cosmic microwave background (CMB) temperature on large scales. We revisit these CMB anomalies using new foreground-cleaned CMB tempera…

astro-ph.CO2025★ 2 cited

Nearly Full-Sky Low-Multipole Cosmic Microwave Background Temperature Anisotropy: II. Angular Power Spectra and Likelihood

Hayley C. Nofi, Graeme E. Addison, Charles L. Bennett +2

We present a CMB temperature power spectrum measurement at large angular scales from WMAP and Planck maps that were cleaned of foregrounds using a template-based approach described…

astro-ph.CO2025★ 2 cited

Nearly Full-Sky Low-Multipole Cosmic Microwave Temperature Anisotropy: I. Foreground Cleaned Maps

Hayley C. Nofi, Graeme E. Addison, Charles L. Bennett +2

Studies of cosmic microwave background (CMB) are often limited by foreground contamination. Foreground cleaning is performed either in harmonic or pixel space after data cuts have…

astro-ph.CO2025★ 6 cited

Looking beyond lambda

Alexie Leauthaud, Adam Riess

Widening cracks are appearing in the CDM model and it is becoming increasingly clear that the standard cosmological model struggles to describe the full expansion history of the…

astro-ph.CO2025★ 4 cited

A Bayesian catalog of 100 high-significance voids in the Local Universe

Rosa Malandrino, Guilhem Lavaux, Benjamin D. Wandelt +2

While cosmic voids are now recognized as a valuable cosmological probe, identifying them in a galaxy catalog is challenging for multiple reasons: observational effects such as hole…

astro-ph.CO2025★ 5 cited

Euclid preparation. Simulating thousands of Euclid spectroscopic skies

Euclid Collaboration, P. Monaco, G. Parimbelli +303

We present two extensive sets of 3500+1000 simulations of dark matter haloes on the past light cone, and two corresponding sets of simulated (`mock') galaxy catalogues that represe…

astro-ph.CO2025★ 3 cited

Deciphering Baryonic Feedback from ACT tSZ Galaxy Clusters

Nihar Dalal, Chun-Hao To, Chris Hirata +4

The next generation of cosmology surveys will probe the matter distribution of the universe to unparalleled precision. To match this level of precision in cosmological parameter es…

astro-ph.CO2025★ 10 cited

Bayesian and frequentist perspectives agree on dynamical dark energy

Laura Herold, Tanvi Karwal

Baryon acoustic oscillation data from the Dark Energy Spectroscopic Instrument (DESI) show evidence of a deviation from a cosmological constant within a Bayesian analysis. In t…

astro-ph.CO2025★ 2 cited

Characterising the Standardisation Properties of Type Ia Supernovae in the z band with Hierarchical Bayesian Modelling

Erin E. Hayes, Suhail Dhawan, Kaisey S. Mandel +21

Type Ia supernovae (SNe Ia) are standardisable candles: their peak magnitudes can be corrected for correlations between light curve properties and their luminosities to precisely e…

astro-ph.CO2025★ 2 cited

Rapid and accurate numerical evolution of linear cosmological perturbations with non-cold relics

Nanoom Lee, José Luis Bernal, Sven Günther +2

We describe the implementation of a new approach to the numerical evaluation of the effects of non-cold relics on the evolution of cosmological perturbations. The Boltzmann hierarc…

astro-ph.CO2025★ 4 cited

CDM and early dark energy in latent space: a data-driven parametrization of the CMB temperature power spectrum

Davide Piras, Laura Herold, Luisa Lucie-Smith +1

Finding the best parametrization for cosmological models in the absence of first-principle theories is an open question. We propose a data-driven parametrization of cosmological mo…

astro-ph.CO2025★ 3 cited

Extending evolution mapping to massive neutrinos with COMET

A. Pezzotta, A. Eggemeier, G. Gambardella +7

We introduce an extension of the evolution mapping framework to cosmological models that include massive neutrinos. The original evolution mapping framework exploits a degeneracy i…

astro-ph.CO2025★ 11 cited

Role of the counterterms in the conservation of superhorizon curvature perturbations at one loop

Keisuke Inomata

Recently, several papers have claimed that superhorizon curvature perturbations are not conserved at the one-loop level in single-field inflation models if there is a transient ult…