E. S. Battistelli
A5004366200- Radio Astronomy Observations and Technology
- Superconducting and THz Device Technology
- Cosmology and Gravitation Theories
- Galaxies: Formation, Evolution, Phenomena
- Astrophysics and Cosmic Phenomena
- Astronomy and Astrophysical Research
- Astrophysics and Star Formation Studies
- Dark Matter and Cosmic Phenomena
- Stellar, planetary, and galactic studies
- Physics of Superconductivity and Magnetism
- Astronomical Observations and Instrumentation
- Advanced Thermodynamic Systems and Engines
- Scientific Research and Discoveries
- Geophysics and Gravity Measurements
- Particle Detector Development and Performance
- Gamma-ray bursts and supernovae
- Calibration and Measurement Techniques
- History and Developments in Astronomy
- Adaptive optics and wavefront sensing
- Solar and Space Plasma Dynamics
- Microwave Engineering and Waveguides
- Antenna Design and Optimization
- Superconducting Materials and Applications
- Astrophysical Phenomena and Observations
- Spectroscopy and Laser Applications
Sapienza University of Rome
2016-2025
Istituto Nazionale di Fisica Nucleare
2008-2024
Istituto Nazionale di Fisica Nucleare, Sezione di Roma I
2010-2024
National Institute for Astrophysics
2019-2024
Osservatorio Astronomico di Cagliari
2015-2021
National University of Ireland, Maynooth
2018
The University of Tokyo
2018
Osaka University
2018
Kyoto University
2018
Nagoya University
2018
This White Paper, submitted to the recent ESA call for science themes define its future large missions, advocates need a transformational leap in our understanding of two key questions astrophysics: 1) How does ordinary matter assemble into scale structures that we see today? 2) do black holes grow and shape Universe? Hot gas clusters, groups intergalactic medium dominates baryonic content local Universe. To understand astrophysical processes responsible formation assembly these structures,...
We present constraints on cosmological and astrophysical parameters from high-resolution microwave background maps at 148 GHz 218 made by the Atacama Cosmology Telescope (ACT) in three seasons of observations 2008 to 2010. A model primary secondary foreground is fit map power spectra lensing deflection spectrum, including contributions both thermal Sunyaev-Zeldovich (tSZ) effect kinematic (kSZ) effect, Poisson correlated anisotropy unresolved infrared sources, radio correlation between tSZ...
[Abridged] We present a catalog of 68 galaxy clusters, which 19 are new discoveries, detected via the Sunyaev-Zel'dovich effect (SZ) at 148 GHz in Atacama Cosmology Telescope (ACT) survey 504 square degrees on celestial equator. A subsample 48 clusters within 270 degree region overlapping SDSS Stripe 82 is estimated to be 90% complete for M_500c > 4.5e14 Msun and 0.15 < z 0.8. While matched filters used detect sample studied further through "Profile Based Amplitude Analysis" using...
We present cosmological parameters derived from the angular power spectrum of cosmic microwave background (CMB) radiation observed at 148 GHz and 218 over 296 deg2 with Atacama Cosmology Telescope (ACT) during its 2008 season. ACT measures fluctuations scales 500 < ℓ 10, 000. fit a model for lensed CMB, Sunyaev–Zel'dovich (SZ), foreground contribution to spectra, including thermal kinetic SZ, Poisson radio infrared point sources, clustered sources. At = 3000, about half comes primary CMB...
We present the temperature power spectra of cosmic microwave background (CMB) derived from three seasons data Atacama Cosmology Telescope (ACT) at 148 GHz and 218 GHz, as well cross-frequency spectrum between two channels. detect correct for contamination due to Galactic cirrus in our equatorial maps. results a number tests possible systematic error conclude that any effects are not significant compared statistical errors we quote. Where they overlap, cross-correlate ACT South Pole (SPT)...
PRISM (Polarized Radiation Imaging and Spectroscopy Mission) was proposed to ESA in May 2013 as a large-class mission for investigating within the framework of Cosmic Vision program set important scientific questions that require high resolution, sensitivity, full-sky observations sky emission at wavelengths ranging from millimeter-wave far-infrared. PRISM's main objective is explore distant universe, probing cosmic history very early times until now well structures, distribution matter,...
Using high-resolution microwave sky maps made by the Atacama Cosmology Telescope, we for first time present strong evidence motions of galaxy clusters and groups via background temperature distortions due to kinematic Sunyaev-Zel'dovich effect. Galaxy are identified their constituent luminous galaxies observed Baryon Oscillation Spectroscopic Survey, part Sloan Digital Sky Survey III. We measure mean pairwise momentum clusters, with a probability signal being random errors 0.002, is...
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...
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...
Abstract We investigate the impact and mitigation of extragalactic foregrounds for cosmic microwave background (CMB) lensing power spectrum analysis Atacama Cosmology Telescope (ACT) data release 6 (DR6) data. Two independent sky simulations are used to test a range strategies. demonstrate that finding then subtracting point sources, models clusters, using profile bias-hardened estimator together reduce fractional biases well below statistical uncertainties, with inferred amplitude, A lens ,...
We report on 23 clusters detected blindly as Sunyaev–ZEL'DOVICH (SZ) decrements in a 148 GHz, 455 deg2 map of the southern sky made with data from Atacama Cosmology Telescope 2008 observing season. All SZ detections announced this work have confirmed optical counterparts. Ten are new discoveries. One newly discovered cluster, ACT-CL J0102−4915, redshift 0.75 (photometric), has an decrement comparable to most massive systems at lower redshifts. Simulations cluster recovery method reproduce...
The Atacama Cosmology Telescope was designed to measure small-scale anisotropies in the Cosmic Microwave Background and detect galaxy clusters through Sunyaev-Zel'dovich effect. instrument is located on Cerro Toco Desert, at an altitude of 5190 meters. A six-meter off-axis Gregorian telescope feeds a new type cryogenic receiver, Millimeter Bolometer Array Camera. receiver features three 1000-element arrays transition-edge sensor bolometers for observations 148 GHz, 218 277 GHz. Each detector...
The Atacama Cosmology Telescope has measured the angular power spectra of microwave fluctuations to arcminute scales at frequencies 148 and 218 GHz, from three seasons data. At small in primordial Cosmic Microwave Background (CMB) become increasingly obscured by extragalactic foregounds secondary CMB signals. We present results a nine-parameter model describing these effects, including thermal kinematic Sunyaev-Zel'dovich (tSZ kSZ) power; clustered Poisson-like Infrared (CIB) sources, their...
We present measurements of the cosmic microwave background (CMB) power spectrum made by Atacama Cosmology Telescope at 148 GHz and 218 GHz, as well cross-frequency between two channels. Our results clearly show second through seventh acoustic peaks in CMB spectrum. The these higher-order provide an additional test {\Lambda}CDM cosmological model. At l > 3000, we detect excess primary anisotropy CMB. lower multipoles 500 < find evidence for gravitational lensing 2.8{\sigma} level. also a low...
We present constraints on cosmological parameters based a sample of Sunyaev-Zel'dovich-selected galaxy clusters detected in millimeter-wave survey by the Atacama Cosmology Telescope. The cluster used this analysis consists 9 optically-confirmed high-mass comprising high-significance end total identified 455 square degrees sky surveyed during 2008 at 148 GHz. focus most massive systems to reduce degeneracy between unknown astrophysics and cosmology derived from SZ surveys. describe scaling...
Future observations of cosmic microwave background (CMB) polarisation have the potential to answer some most fundamental questions modern physics and cosmology, including: what physical process gave birth Universe we see today? What are dark matter energy that seem constitute 95% density Universe? Do need extensions standard model particle interactions? Is ΛCDM cosmological scenario correct, or missing an essential piece puzzle? In this paper, list requirements for a future CMB survey...
The Atacama Cosmology Telescope is a 6 m telescope designed to map the cosmic microwave background simultaneously at 145, 215, and 280 GHz with arcminute resolution. Each frequency will have 32 by element focal plane array of transition edge sensor bolometers. cold reimaging optics are optimized for millimeter-wave observations these sensitive detectors. design each described.