J. Weller
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View article: Dark Energy Survey Year 3 results: <i>w</i> CDM cosmology from simulation-based inference with persistent homology on the sphere
Dark Energy Survey Year 3 results: <i>w</i> CDM cosmology from simulation-based inference with persistent homology on the sphere Open
We present cosmological constraints from Dark Energy Survey Year 3 (DES Y3) weak lensing data using persistent homology, a topological data analysis technique that tracks how features like clusters and voids evolve across density threshold…
View article: \textit{Euclid}: From Galaxies to Gravitational Waves -- Forecasting Stochastic Gravitational Wave Background Anisotropies and Their Cross-Correlation
\textit{Euclid}: From Galaxies to Gravitational Waves -- Forecasting Stochastic Gravitational Wave Background Anisotropies and Their Cross-Correlation Open
We estimate the amplitude and spatial anisotropy in the stochastic gravitational wave background (SGWB) energy density due to compact binary coalescence (CBC) events: binary black holes (BBH), binary neutron stars (BNS), and black hole-neu…
View article: Cosmology with second- and third-order shear statistics for the Dark Energy Survey: Methods and simulated analysis
Cosmology with second- and third-order shear statistics for the Dark Energy Survey: Methods and simulated analysis Open
International audience
View article: Why Cosmic Voids Matter: Pristine Evolution
Why Cosmic Voids Matter: Pristine Evolution Open
We utilize the Magneticum suite of hydrodynamical simulations to investigate the formation and evolution of cosmic voids from $z = 5.04$ to present day, using cold dark matter and (sub-) halo tracers in high-density samples. This includes …
View article: Cosmological constraints from the Planck cluster catalogue with DES shear profiles and Chandra observations
Cosmological constraints from the Planck cluster catalogue with DES shear profiles and Chandra observations Open
We present cosmological constraints from the Planck PSZ2 cosmological cluster sample, using weak-lensing shear profiles from Dark Energy Survey (DES) data and X-ray observations from the Chandra telescope for the mass calibration. We compu…
View article: Dark energy survey: Modeling strategy for multiprobe cluster cosmology and validation for the full six-year dataset
Dark energy survey: Modeling strategy for multiprobe cluster cosmology and validation for the full six-year dataset Open
International audience
View article: Dark Energy Survey Year 3 Results: Cosmological constraints from second and third-order shear statistics
Dark Energy Survey Year 3 Results: Cosmological constraints from second and third-order shear statistics Open
We present a cosmological analysis of the third-order aperture mass statistic using Dark Energy Survey Year 3 (DES Y3) data. We perform a complete tomographic measurement of the three-point correlation function of the Y3 weak lensing shape…
View article: The Atacama Cosmology Telescope: DR6 Sunyaev-Zel'dovich Selected Galaxy Clusters Catalog
The Atacama Cosmology Telescope: DR6 Sunyaev-Zel'dovich Selected Galaxy Clusters Catalog Open
We present the results of a search for galaxy clusters in the Atacama Cosmology Telescope (ACT) Data Release 6 (DR6) microwave sky maps covering 16293 square degrees in three frequency bands, using data obtained over the lifetime of the pr…
View article: The final WaZP galaxy cluster catalog of the Dark Energy Survey and comparison with SZE data
The final WaZP galaxy cluster catalog of the Dark Energy Survey and comparison with SZE data Open
In this work, we present and characterize the galaxy cluster catalog detected by the WaZP cluster finder, which is not based on red-sequence identification, on the full six years of observations of the Dark Energy Survey (DES-Y6). The full…
View article: Comparing the DES-SN5YR and Pantheon+ SN cosmology analyses: investigation based on ‘evolving dark energy or supernovae systematics’?
Comparing the DES-SN5YR and Pantheon+ SN cosmology analyses: investigation based on ‘evolving dark energy or supernovae systematics’? Open
Recent cosmological analyses measuring distances of type Ia supernovae (SNe Ia) and baryon acoustic oscillations (BAO) have all given similar hints at time-evolving dark energy. To examine whether underestimated SN Ia systematics might be …
View article: Sampling Bayesian probabilities given only sampled priors
Sampling Bayesian probabilities given only sampled priors Open
A typical Bayesian inference on the values of some parameters of interest $q$ from some data $D$ involves running a Markov Chain (MC) to sample from the posterior $p(q,n | D) \propto \mathcal{L}(D | q,n) p(q) p(n),$ where $n$ are some nuis…
View article: Interacting dark sector within ETHOS: Cosmological constraints from SPT cluster abundance with DES and HST weak lensing data
Interacting dark sector within ETHOS: Cosmological constraints from SPT cluster abundance with DES and HST weak lensing data Open
We use galaxy cluster abundance measurements from the South Pole Telescope enhanced by multicomponent matched filter confirmation and complemented with mass information obtained using weak-lensing data from Dark Energy Survey Year 3 (DES Y…
View article: Dark Energy Survey Year 3 Results: Cosmological Constraints from Cluster Abundances, Weak Lensing, and Galaxy Clustering
Dark Energy Survey Year 3 Results: Cosmological Constraints from Cluster Abundances, Weak Lensing, and Galaxy Clustering Open
Galaxy clusters provide a unique probe of the late-time cosmic structure and serve as a powerful independent test of the $\Lambda$CDM model. This work presents the first set of cosmological constraints derived with ~16,000 optically select…
View article: On opportunities and challenges of large multimodal foundation models in education
On opportunities and challenges of large multimodal foundation models in education Open
View article: Selection Function of Clusters in Dark Energy Survey Year 3 Data from Cross-Matching with South Pole Telescope Detections
Selection Function of Clusters in Dark Energy Survey Year 3 Data from Cross-Matching with South Pole Telescope Detections Open
Galaxy clusters selected based on overdensities of galaxies in photometric surveys provide the largest cluster samples. Yet modeling the selection function of such samples is complicated by non-cluster members projected along the line of s…
View article: Constraints on <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>f</mml:mi><mml:mo stretchy="false">(</mml:mo><mml:mi>R</mml:mi><mml:mo stretchy="false">)</mml:mo></mml:mrow></mml:math> gravity from thermal-Sunyaev-Zel’dovich-effect-selected SPT galaxy clusters and weak lensing mass calibration from DES and HST
Constraints on gravity from thermal-Sunyaev-Zel’dovich-effect-selected SPT galaxy clusters and weak lensing mass calibration from DES and HST Open
We present constraints on the f(R) gravity model using a sample of 1005 galaxy clusters in the redshift range 0.25–1.78 that have been selected through the thermal Sunyaev-Zel’dovich effect from South Pole Telescope data and subjected to o…
View article: Constraints on Ultra-light Axion Dark Matter through Galaxy Cluster Number Counts
Constraints on Ultra-light Axion Dark Matter through Galaxy Cluster Number Counts Open
Ultra-light axions are hypothetical scalar particles that influence the evolution of large-scale structures of the Universe. Depending on their mass, they can potentially be part of the dark matter component of the Universe, as candidates …
View article: Evaluating cosmological biases using photometric redshifts for Type Ia Supernova cosmology with the Dark Energy Survey Supernova Program
Evaluating cosmological biases using photometric redshifts for Type Ia Supernova cosmology with the Dark Energy Survey Supernova Program Open
Cosmological analyses with Type Ia Supernovae (SNe Ia) have traditionally been reliant on spectroscopy for both classifying the type of supernova and obtaining reliable redshifts to measure the distance–redshift relation. While obtaining a…
View article: Interacting Dark Sector (ETHOS $n=0$): Cosmological Constraints from SPT Cluster Abundance with DES and HST Weak Lensing Data
Interacting Dark Sector (ETHOS $n=0$): Cosmological Constraints from SPT Cluster Abundance with DES and HST Weak Lensing Data Open
We use galaxy cluster abundance measurements from the South Pole Telescope (SPT) enhanced by Multi-Component Matched Filter (MCMF) confirmation and complemented with mass information obtained using weak-lensing data from Dark Energy Survey…
View article: Dark energy survey year 3 results: likelihood-free, simulation-based <i>w</i>CDM inference with neural compression of weak-lensing map statistics
Dark energy survey year 3 results: likelihood-free, simulation-based <i>w</i>CDM inference with neural compression of weak-lensing map statistics Open
We present simulation-based cosmological wcold dark matter (wCDM) inference using dark energy survey year 3 weak-lensing maps, via neural data compression of weak-lensing map summary statistics: power spectra, peak counts, and direct map-l…
View article: Learning Optimal and Interpretable Summary Statistics of Galaxy Catalogs with SBI
Learning Optimal and Interpretable Summary Statistics of Galaxy Catalogs with SBI Open
How much cosmological information can we reliably extract from existing and upcoming large-scale structure observations? Many summary statistics fall short in describing the non-Gaussian nature of the late-time Universe in comparison to ex…
View article: PICZL: Image-based photometric redshifts for AGN
PICZL: Image-based photometric redshifts for AGN Open
Context . Computing reliable photometric redshifts (photo-z) for active galactic nuclei (AGN) is a challenging task, primarily due to the complex interplay between the unresolved relative emissions associated with the supermassive black ho…
View article: PICZL: Image-based Photometric Redshifts for AGN
PICZL: Image-based Photometric Redshifts for AGN Open
Computing photo-z for AGN is challenging, primarily due to the interplay of relative emissions associated with the SMBH and its host galaxy. SED fitting methods, effective in pencil-beam surveys, face limitations in all-sky surveys with fe…
View article: On marginals and profiled posteriors for cosmological parameter estimation
On marginals and profiled posteriors for cosmological parameter estimation Open
With several examples and in an analysis of the Pantheon+ supernova sample we discuss the properties of the marginal posterior distribution versus the profiled posterior distribution — the profile likelihood in a Bayesian disguise. We inve…
View article: The gravitational lensing imprints of DES Y3 superstructures on the CMB: a matched filtering approach
The gravitational lensing imprints of DES Y3 superstructures on the CMB: a matched filtering approach Open
Low-density cosmic voids gravitationally lens the cosmic microwave background (CMB), leaving a negative imprint on the CMB convergence $\kappa$. This effect provides insight into the distribution of matter within voids, and can also be use…
View article: Constraints on $f(R)$ gravity from tSZE-selected SPT galaxy clusters and weak lensing mass calibration from DES and HST
Constraints on $f(R)$ gravity from tSZE-selected SPT galaxy clusters and weak lensing mass calibration from DES and HST Open
We present constraints on the $f(R)$ gravity model using a sample of 1,005 galaxy clusters in the redshift range $0.25 - 1.78$ that have been selected through the thermal Sunyaev-Zel'dovich effect (tSZE) from South Pole Telescope (SPT) dat…
View article: Dark Energy Survey: Galaxy sample for the baryonic acoustic oscillation measurement from the final dataset
Dark Energy Survey: Galaxy sample for the baryonic acoustic oscillation measurement from the final dataset Open
Artículo escrito por un elevado número de autores, solo se referencian el que aparece en primer lugar, el nombre del grupo de colaboración, si le hubiere, y los autores pertenecientes a la UAM
View article: The SRG/eROSITA All-Sky Survey
The SRG/eROSITA All-Sky Survey Open
Context . Galaxy groups lying between galaxies and galaxy clusters in the mass spectrum of dark matter halos play a crucial role in the evolution and formation of the large-scale structure. Their shallower potential wells compared to clust…
View article: On marginals and profiled posteriors for cosmological parameter estimation
On marginals and profiled posteriors for cosmological parameter estimation Open
With several examples and in an analysis of the Pantheon+ supernova sample we discuss the properties of the marginal posterior distribution versus the profiled posterior distribution -- the profile likelihood in a Bayesian disguise. We inv…
View article: Why cosmic voids matter: mitigation of baryonic physics
Why cosmic voids matter: mitigation of baryonic physics Open
We utilize the Magneticum suite of state-of-the-art hydrodynamical, as well as dark-matter-only simulations to investigate the effects of baryonic physics on cosmic voids in the highest-resolution study of its kind. This includes the size,…