Stefania Amodeo
A5055066082- Galaxies: Formation, Evolution, Phenomena
- Astronomy and Astrophysical Research
- Radio Astronomy Observations and Technology
- Cosmology and Gravitation Theories
- Astrophysics and Cosmic Phenomena
- Astrophysics and Star Formation Studies
- Calibration and Measurement Techniques
- Astronomical Observations and Instrumentation
- Stellar, planetary, and galactic studies
- Astrophysical Phenomena and Observations
- Gamma-ray bursts and supernovae
- Spacecraft and Cryogenic Technologies
- Advanced Thermodynamic Systems and Engines
- Scientific Computing and Data Management
- Scientific Research and Discoveries
- Particle Detector Development and Performance
- Infrared Target Detection Methodologies
- Advanced Chemical Physics Studies
- Superconducting Materials and Applications
- Experimental Learning in Engineering
- Dark Matter and Cosmic Phenomena
- Complex Systems and Time Series Analysis
- Sports Science and Education
- Digital Innovation in Industries
- Distributed and Parallel Computing Systems
Observatoire astronomique de Strasbourg
2021-2024
Centre National de la Recherche Scientifique
2017-2024
Université de Strasbourg
2021-2024
OpenAIRE Non-Profit Civil Partnership
2023
Cornell University
2020-2022
Laboratoire d’Etudes du Rayonnement et de la Matière en Astrophysique et Atmosphères
2017-2020
Sorbonne Université
2017-2020
Université Paris Sciences et Lettres
2017-2018
University of Bologna
2016
We present new arcminute-resolution maps of the Cosmic Microwave Background temperature and polarization anisotropy from Atacama Cosmology Telescope, using data taken 2013-2016 at 98 150 GHz. The cover more than 17,000 deg$^2$, deepest 600 deg$^2$ with noise levels below 10 $\mu$K-arcmin. use power spectrum derived almost 6,000 these to constrain cosmology. ACT enable a measurement angular scale features in both divergence-like anisotropy, tracing velocity density last-scattering. From one...
We present the temperature and polarization angular power spectra of CMB measured by Atacama Cosmology Telescope (ACT) from 5400 deg$^2$ 2013-2016 survey, which covers $>$15000 at 98 150 GHz. For this analysis we adopt a blinding strategy to help avoid confirmation bias and, related this, show numerous checks for systematic error done before unblinding. Using likelihood cosmological constrain secondary sources anisotropy foreground emission, derive "CMB-only" spectrum that extends...
We present cosmological constraints from a gravitational lensing mass map covering 9400 sq. deg. reconstructed CMB measurements made by the Atacama Cosmology Telescope (ACT) 2017 to 2021. In combination with BAO (from SDSS and 6dF), we obtain amplitude of matter fluctuations $\sigma_8 = 0.819 \pm 0.015$ at 1.8% precision, $S_8\equiv\sigma_8({\Omega_{\rm m}}/0.3)^{0.5}=0.840\pm0.028$ Hubble constant $H_0= (68.3 1.1)\, \text{km}\,\text{s}^{-1}\,\text{Mpc}^{-1}$ 1.6% precision. A joint...
The imprint left on the cosmic microwave background (CMB) from CMB photons scattering off high-energy electrons in galaxies and clusters is known as Sunyaev-Zel'dovich (SZ) effect subject of these two papers Atacama Cosmology Telescope (ACT). ACT measurements combined with those Planck BOSS are shown to provide a rich picture electron gas thermodynamics galactic cluster medium. This can be used test improve cosmological simulations relevant for upcoming experiments.
We present new measurements of cosmic microwave background (CMB) lensing over $9400$ sq. deg. the sky. These are derived from Atacama Cosmology Telescope (ACT) Data Release 6 (DR6) CMB dataset, which consists five seasons ACT temperature and polarization observations. determine amplitude power spectrum at $2.3\%$ precision ($43\sigma$ significance) using a novel pipeline that minimizes sensitivity to foregrounds noise properties. To ensure our results robust, we analyze an extensive set null...
Observations of the millimeter sky contain valuable information on a number signals, including blackbody cosmic microwave background (CMB), Galactic emissions, and Compton-y distortion due to thermal Sunyaev-Zel'dovich (tSZ) effect. Extracting new insight into cosmological astrophysical questions often requires combining multiwavelength observations spectrally isolate one component. In this work, we present arc-minute-resolution map, which traces out line-of-sight-integrated electron...
The thermal and kinematic Sunyaev-Zel'dovich effects (tSZ, kSZ) probe the thermodynamic properties of circumgalactic intracluster medium (CGM ICM) galaxies, groups, clusters, since they are proportional, respectively, to integrated electron pressure momentum along line-of-sight. We present constraints on gas thermodynamics CMASS galaxies in Baryon Oscillation Spectroscopic Survey (BOSS) using new measurements kSZ tSZ signals obtained a companion paper. Combining measurements, we measure...
ABSTRACT Modern weak-lensing observations are becoming increasingly sensitive to baryonic feedback processes which still poorly understood. So far, this challenge has been faced either by imposing scale-cuts in the data or modelling effects with simple, one-parameter models. In paper, we rely on a more general, seven-parameter prescription of effects, is primarily motivated and shown agree plethora hydrodynamical simulations. By combining from Kilo-Degree Survey (KiDS-1000) gas around galaxy...
We present a $5.4\ensuremath{\sigma}$ detection of the pairwise kinematic Sunyaev-Zeldovich (kSZ) effect using Atacama Cosmology Telescope (ACT) and Planck CMB observations in combination with Luminous Red Galaxy samples from Sloan Digital Sky Survey (SDSS) DR15 catalog. Results are obtained three ACT maps: co-added 150 98 GHz maps, combining 2008--2018 (ACT DR5), which overlap SDSS over 3,700 sq. deg., component-separated map night-time only 2014--2015 DR4), overlapping 2,089 deg....
Abstract We present a catalog of 4195 optically confirmed Sunyaev–Zel’dovich (SZ) selected galaxy clusters detected with signal-to-noise ratio >4 in 13,211 deg 2 sky surveyed by the Atacama Cosmology Telescope (ACT). Cluster candidates were applying multifrequency matched filter to 98 and 150 GHz maps constructed from ACT observations obtained 2008 2018 using deep, wide-area optical surveys. The span redshift range 0.04 < z 1.91 (median = 0.52). contains 222 > 1 clusters, total 868...
(Abridged) To understand if the morphology-density and passive-density relations are already established at z>1.5, we study galaxies in 16 confirmed clusters $1.3<z<2.8$ from CARLA survey. Our main finding is that place $z\sim2$. The cluster z = 2.8 shows a similar fraction of ETG as other its densest region. passive fractions depend on local environment mildly galaxy mass. They do not global environment. At lower densities, exhibit than 1. This implies regions influence morphology first,...
Abstract It is important to understand the cycle of baryons through circumgalactic medium (CGM) in context galaxy formation and evolution. In this study, we forecast constraints on feedback processes heating CGM with current future Sunyaev–Zeldovich (SZ) observations. To constrain these processes, use a suite cosmological simulations, Cosmology Astrophysics MachinE Learning Simulations (CAMELS). CAMELS varies four different parameters two previously existing hydrodynamical IllustrisTNG...
Abstract We present a new cosmological probe for galaxy clusters, the halo sparsity. This characterizes halos in terms of ratio masses measured at two different radii and carries information encoded mass profile. Building on work Balmes et al., we test properties sparsity using catalogs from numerical N -body simulation (2.6 Gpc h −1 ) 3 volume with 4096 particles. show that given redshift average can be predicted prior knowledge function. provides quantitative framework to infer parameter...
We use gravitational lensing of the cosmic microwave background (CMB) to measure mass most distant blindly-selected sample galaxy clusters on which a measurement has been performed date. In CMB data from Atacama Cosmology Telescope (ACT) and Planck satellite, we detect stacked effect 677 near-infrared-selected Massive Distant Clusters WISE Survey (MaDCoWS), have mean redshift $ \langle z \rangle = 1.08$. There are no current optical weak measurements that match distance average this sample....
We present high signal-to-noise measurements (up to 12$\sigma$) of the average thermal Sunyaev Zel'dovich (tSZ) effect from optically selected galaxy groups and clusters estimate their baryon content within a 2.1$^\prime$ radius aperture. Sources Sloan Digital Sky Survey (SDSS) Baryon Oscillation Spectroscopic (BOSS) DR15 catalog overlap with 3,700 sq. deg. sky observed by Atacama Cosmology Telescope (ACT) 2008 2018 at 150 98 GHz (ACT DR5), 2,089 internal linear combination...
The kinematic and thermal Sunyaev-Zel'dovich (kSZ tSZ) effects probe the abundance thermodynamics of ionized gas in galaxies clusters. We present a new hybrid estimator to measure kSZ effect by combining cosmic microwave background temperature anisotropy maps with photometric spectroscopic optical survey data. method interpolates velocity reconstruction from catalog at positions objects catalog, which makes it possible leverage high number density precision survey. Combining this measurement...
We study the galaxy mass-size relation in 15 spectroscopically confirmed clusters at 1.4 < z 2.8 from CARLA survey. Our span a total stellar mass range 11.3 log( M * c / ⊙ ) 12.6 (with an approximate halo 13.5 ≲ h 14.5). main finding is that cluster passive early-type galaxies (ETGs) ≳ 1.5 with > 10.5 are systematically ≳0.2 − 0.3dex larger (≳3 σ than field ETGs similar redshift and CANDELS The ETG average size evolution slower 1 2 when compared to field. This could be explained by...
Galaxy clusters are the most recent, gravitationally-bound products of hierarchical mass accretion over cosmological scales. How is concentrated predicted to correlate with total in cluster's halo, systems at higher being less given redshift and for any mass, lower concentration found redshifts. Through a spatial spectral X-ray analysis, we reconstruct profile 47 galaxy observed Chandra range $0.40.4$, well suited provide first constraint on concentration--mass relation $z>0.7$ from...
Abstract The thermal Sunyaev–Zel’dovich (tSZ) effect is a powerful tool with the potential for constraining directly properties of hot gas that dominates dark matter halos because it measures pressure and thus energy density. Studying this component circumgalactic medium (CGM) important strongly impacted by star formation active galactic nucleus (AGN) activity in galaxies, participating feedback loop regulates black hole mass growth galaxies. We study tSZ across wide halo-mass range using...
The MeerKAT Exploration of Relics, Giant Halos, and Extragalactic Radio Sources (MERGHERS) survey is a planned project to study large statistical sample galaxy clusters with the observatory. Here we present results 16--hour pilot project, observed in response 2019 Shared Risk proposal call, test feasibility using for cluster short (0.2--2.1\,hour) integration times. focuses on 1.28\,GHz observations 13 massive, low-to-intermediate redshift ($0.22 < z 0.65$) from...
Achieving a precise understanding of galaxy formation in cosmological context is one the great challenges theoretical astrophysics, due to vast range spatial scales involved relevant physical processes. Observations millimeter bands, particularly those using cosmic microwave background (CMB) radiation as "backlight", provide unique probe thermodynamics these processes, with capability directly measure density, pressure, and temperature ionized gas. Moreover, observations have uniquely high...
Context. Galaxy clusters are an important tool for cosmology, and their detection characterization key goals current future surveys. Using data from the Wide-field Infrared Survey Explorer (WISE), Massive Distant Clusters of WISE (MaDCoWS) located 2839 significant galaxy overdensities at redshifts 0.7 ≲ z 1.5, which included extensive follow-up imaging Spitzer Space Telescope to determine cluster richnesses. Concurrently, Atacama Cosmology (ACT) has produced large area millimeter-wave maps...
We measure the Planck cluster mass bias using dynamical measurements based on velocity dispersions of a subsample 17 Planck-detected clusters. The were calculated redshifts determined from spectra obtained at Gemini observatory with GMOS multi-object spectrograph. correct our estimates for effects due to finite aperture, Eddington and correlated scatter between dispersion proxy. result parameter, $(1-b)$, depends value galaxy $b_v$ adopted simulations: $(1-b)=(0.51\pm0.09) b_v^3$. Using...
Passive early-type galaxies dominate cluster cores at z $\lesssim$1.5. At higher redshift, core are observed to have still on-going star-formation, fuelled by cold molecular gas. We measure the gas reservoir of central region around radio-loud AGN in CARLA J1103+3449 z=1.44 with NOEMA. The synchrotron emission dominates continuum 94.48 GHz, and we its flux position two radio jets. Combining our measurements published results over range 4.71 GHz-94.5 obtain a flat spectral index $\alpha =...