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19932026
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677 papers · 1 filter

astro-ph.CO2026

Euclid preparation. The shape of halo profiles in CDM and non-standard cosmologies

Euclid Collaboration, L. Pizzuti, G. Y. Ferron +304

We study the shape of three-dimensional and projected dark-matter halo profiles extracted from cosmological -body simulations in CDM and non-standard cosmologies, using the \…

astro-ph.CO2026

Intracluster light and dark matter halo shapes reflect common assembly, not mutual coupling: shape correspondence in CDM but not SIDM

G. Martin, N. A. Hatch, W. Cui +8

The intracluster light (ICL) has been proposed as a luminous tracer of the dark matter (DM) halo shape in galaxy clusters, with recent observational studies and CDM simulations…

astro-ph.CO2026

Forest without Trees is still Fruitful: Constraints on the thermal state of the neutral IGM at with the 21-cm forest power spectrum

Tomáš Šoltinský, Arnab Chakraborty, Girish Kulkarni +10

Neutral regions of the intergalactic medium (IGM) during the Epoch of Reionization (EoR) remain largely unexplored due to the limitations of existing probes. Owing to discoveries o…

astro-ph.CO2026

Euclid preparation. CosmoPostProcess: A simulation calibrated framework for weak lensing selection bias in richness-selected galaxy clusters

Euclid Collaboration, R. Ingrao, M. Costanzi +280

We present \texttt{CosmoPostProcess}, a simulation-based forward-modelling algorithm calibrated to reproduce Euclid optical cluster observables. Its main deliverable is a correctio…

astro-ph.CO2026★ 1 cited

Double-Peaked Ly Emission during Reionization Requires Nearby Voids and a Favorable Local Ionizing Background

Hyunbae Park, Aaron Smith, Intae Jung +11

Several Lyman-alpha (Ly) emitters deep into the reionization era exhibit double-peaked Ly emission profiles, raising the question of how the intergalactic medium can transmit…

astro-ph.CO2026

Intracluster Light as a Probe for Dark Matter: Exploring Self-interacting Dark Matter and Cold Dark Matter with C-EAGLE Sims

Jaewon Yoo, Ellen L. Sirks, Cristiano G. Sabiu +5

We assess whether intracluster light (ICL) can serve as an observational discriminator of dark matter physics. The self-interacting dark matter (SIDM) model has gained increasing a…

astro-ph.CO2025★ 2 cited

Witten-O'Raifeartaigh potential revisited in the context of Warm Inflation

Suratna Das, Umang Kumar, Swagat S. Mishra +1

Warm Inflation is a scenario in which the inflaton field dissipates its energy during inflation to maintain a subdominant constant radiation bath. Two of its remarkable features ar…

astro-ph.CO2025★ 2 cited

Accelerated inference of microlensed gravitational waves with machine learning

Marienza Caldarola, Srashti Goyal, Nihar Gupte +2

Gravitational waves (GWs) within the LIGO-Virgo-KAGRA sensitivity band can be microlensed by stellar and intermediate-mass black holes, producing a frequency-dependent modulation o…

astro-ph.CO2025★ 3 cited

The role of supercluster filaments in shaping galaxy clusters

Raúl Baier-Soto, Yara Jaffé, Alexis Finoguenov +44

In a hierarchical CDM Universe, cosmic filaments serve as the primary channels for matter accretion into galaxy clusters, influencing the shape of their dark matter halos. We in…

astro-ph.CO2025

The origin of the intra-cluster light in The Three Hundred simulations

A. Contreras-Santos, A. Knebe, W. Cui +9

We investigate the origin and formation mechanisms of the intra-cluster light (ICL) in The Three Hundred simulations, a set of 324 hydrodynamically resimulated massive galaxy clust…

astro-ph.CO2025

Reionization in HESTIA: Studying reionization in the LG through zoom simulations

David Attard, Luke Conaboy, Noam Libeskind +3

While cosmic reionization has been broadly constrained by global observables, the interplay between internal sources [Milky Way (MW), M31, and their satellites] and external ioniza…

astro-ph.CO2025★ 2 cited

An improved model for the effect of correlated Si-III absorption on the one-dimensional Lyman- forest power spectrum

Ke Ma, James S. Bolton, Vid Irsic +2

We present an analysis of Si III absorption and its effect on the 1D Ly forest power spectrum using the Sherwood-Relics hydrodynamical simulation suite. In addition to oscillati…

astro-ph.CO2025

Euclid preparation. XCI. Validation method for the detections in the Euclid Catalogue of Galaxy Clusters using external data

Euclid Collaboration, J. -B. Melin, S. A. Stanford +315

We present our methodology for identifying known clusters as counterparts to objects in the Euclid Catalogue of Galaxy Clusters (ECGC). Euclid is expected to detect a large number…

astro-ph.CO2025

Euclid preparation. Establishing the quality of the 2D reconstruction of the filaments of the cosmic web with DisPerSE using Euclid photometric redshifts

Euclid Collaboration, N. Malavasi, F. Sarron +313

Cosmic filaments are prominent structures of the matter distribution of the Universe. Modern detection algorithms are an efficient way to identify filaments in large-scale observat…

astro-ph.CO2025★ 3 cited

Euclid: Early Release Observations. A combined strong and weak lensing solution for Abell 2390 beyond its virial radius

J. M. Diego, G. Congedo, R. Gavazzi +183

Euclid is presently mapping the distribution of matter in the Universe in detail via the weak lensing (WL) signature of billions of distant galaxies. The WL signal is most prominen…

astro-ph.CO2025★ 3 cited

The Lyman- emitter bispectrum as a probe of reionization morphology

Soumak Maitra, Girish Kulkarni, Shikhar Asthana +3

Ly emitters (LAEs) have now been discovered out to redshift , and are valuable probes of the reionization history at redshifts beyond the reach of other currently availabl…

astro-ph.CO2025★ 7 cited

First upper limits on the 21-cm signal power spectrum of neutral hydrogen at from the LOFAR 3C196 field

E. Ceccotti, A. R. Offringa, F. G. Mertens +16

The redshifted 21-cm signal of neutral hydrogen from the Epoch of Reionization (EoR) can potentially be detected using low-frequency radio instruments such as the Low-Frequency Arr…

astro-ph.CO2025★ 9 cited

Constraining Mixed Dark Matter models with high redshift Lyman-alpha forest data

Olga Garcia-Gallego, Vid Iršič, Martin G. Haehnelt +2

This study sets new constraints on Cold+Warm Dark Matter (CWDM) models by leveraging the small-scale suppression of structure formation imprinted in the Lyman- forest. Using the…

astro-ph.CO2025★ 10 cited

Euclid Quick Data Release (Q1). First detections from the galaxy cluster workflow

Euclid Collaboration, S. Bhargava, C. Benoist +351

The first survey data release by the Euclid mission covers approximately in the Euclid Deep Fields to the same depth as the Euclid Wide Survey. This paper show…

astro-ph.CO2025★ 5 cited

Prospects of a statistical detection of the 21-cm forest and its potential to constrain the thermal state of the neutral IGM during reionization

Tomáš Šoltinský, Girish Kulkarni, Shriharsh P. Tendulkar +1

The 21-cm forest signal is a promising probe of the Epoch of Reionization complementary to other 21-cm line observables and Ly forest signal. Prospects of detecting it have sign…

astro-ph.CO2025★ 8 cited

Constraints on Primordial Magnetic Fields from the Lyman-α forest

Mak Pavičević, Vid Iršič, Matteo Viel +5

We present the first constraints on primordial magnetic fields from the Lyman- forest using full cosmological hydrodynamic simulations. At the scales and redshifts probed by the…

astro-ph.CO2024★ 11 cited

Dark Energy Survey Year 3: Blue Shear

J. McCullough, A. Amon, E. Legnani +115

Modeling the intrinsic alignment (IA) of galaxies poses a challenge to weak lensing analyses. The Dark Energy Survey is expected to be less impacted by IA when limited to blue, sta…

astro-ph.CO2024★ 3 cited

Improving Galaxy Cluster Selection with the Outskirt Stellar Mass of Galaxies

Matthew Kwiecien, Tesla Jeltema, Alexie Leauthaud +53

The number density and redshift evolution of optically selected galaxy clusters offer an independent measurement of the amplitude of matter fluctuations, . However, recent res…

astro-ph.CO2024★ 15 cited

Gravitational wave and particle emission from a cosmic string loop: local case

Jorge Baeza-Ballesteros, Edmund J. Copeland, Daniel G. Figueroa +1

Using lattice field simulations of the Abelian-Higgs model, we characterize the simultaneous emission of (scalar and gauge) particles and gravitational waves (GWs) by local string…