Giuseppe Puglisi
A5055237451- Radio Astronomy Observations and Technology
- Cosmology and Gravitation Theories
- Superconducting and THz Device Technology
- Galaxies: Formation, Evolution, Phenomena
- Geophysics and Gravity Measurements
- Dark Matter and Cosmic Phenomena
- Astrophysics and Cosmic Phenomena
- Astronomy and Astrophysical Research
- Spacecraft Design and Technology
- Solar and Space Plasma Dynamics
- Astrophysics and Star Formation Studies
- Adaptive optics and wavefront sensing
- Computational Physics and Python Applications
- Stellar, planetary, and galactic studies
- Precipitation Measurement and Analysis
- Meteorological Phenomena and Simulations
- Atmospheric Ozone and Climate
- Scientific Research and Discoveries
- European Criminal Justice and Data Protection
- Gamma-ray bursts and supernovae
- Pulsars and Gravitational Waves Research
- Microwave Engineering and Waveguides
- Planetary Science and Exploration
- Advanced Thermodynamic Systems and Engines
- Climate variability and models
Istituto Nazionale di Geofisica e Vulcanologia
2019-2024
Osservatorio Astrofisico di Catania
2024
Istituto Nazionale di Fisica Nucleare, Sezione di Catania
2024
University of Catania
2016-2024
University of California, Berkeley
2018-2023
Lawrence Berkeley National Laboratory
2020-2023
University of Rome Tor Vergata
2022-2023
Campbell Collaboration
2023
University of California, San Diego
2023
Istituto Nazionale di Fisica Nucleare, Sezione di Roma I
2022-2023
Abstract We report an improved measurement of the cosmic microwave background B -mode polarization power spectrum with Polarbear experiment at 150 GHz. By adding new data collected during second season observations (2013–2014) to re-analyzed from first (2012–2013), we have reduced twofold band-power uncertainties. The band powers are reported over angular multipoles , where dominant signal is expected be due gravitational lensing E -modes. reject null hypothesis no a confidence 3.1 σ...
We constrain anisotropic cosmic birefringence using four-point correlations of even-parity $E$-mode and odd-parity $B$-mode polarization in the microwave background measurements made by POLARization Background Radiation (POLARBEAR) experiment its first season observations. find that signal from any parity-violating processes is consistent with zero. The Faraday rotation can be compared equivalent quantity generated primordial magnetic fields if they existed. POLARBEAR nondetection translates...
The Probe of Inflation and Cosmic Origins (PICO) is a proposed probe-scale space mission consisting an imaging polarimeter operating in frequency bands between 20 800 GHz. We describe the science achievable by PICO, which has sensitivity equivalent to more than 3300 Planck missions, technical implementation, schedule cost.
Abstract We study the possibility of using LiteBIRD satellite B -mode survey to constrain models inflation producing specific features in CMB angular power spectra. explore a particular model example, i.e. spectator axion-SU(2) gauge field inflation. This can source parity-violating gravitational waves from amplification fluctuations driven by pseudoscalar “axionlike” field, rolling for few e-folds during The sourced exceed vacuum contribution at reionization bump scales about an order...
Inflation may provide unique insight into the physics at highest available energy scales that cannot be replicated in any realistic terrestrial experiment. Features primordial power spectrum are generically predicted a wide class of models inflation and its alternatives, observationally one most overlooked channels for finding evidence non-minimal inflationary models. Constraints from observations cosmic microwave background cover widest range feature frequencies, but sensitive constraints...
Our current understanding of the Universe is established through pristine measurements structure in cosmic microwave background (CMB) and distribution shapes galaxies tracing large scale (LSS) Universe. One key ingredient that underlies cosmological observables field sources observed assumed to be initially Gaussian with high precision. Nevertheless, a minimal deviation from Gaussianityis perhaps most robust theoretical prediction models explain Universe; itis necessarily present even...
Abstract We present a study of the impact beam far side-lobe lack knowledge on measurement Cosmic Microwave Background B -mode signal at large scale. Beam side-lobes induce mismatch in transfer function Galactic foregrounds between dipole and higher multipoles which degrads performances component separation methods. This leads to foreground residuals CMB map. It is expected be one main source systematic effects future polarization observations. Thus, it becomes crucial for all-sky survey...
POLARBEAR-2 (PB-2) is a cosmic microwave background (CMB) polarization experiment that will be located in the Atacama highland Chile at an altitude of 5200 m. Its science goals are to measure CMB signals originating from both primordial gravitational waves and weak lensing. PB-2 designed tensor scalar ratio, r, with precision {\sigma}(r) < 0.01, sum neutrino masses, {\Sigma}m{\nu}, {\sigma}({\Sigma}m{\nu}) 90 meV. To achieve these goals, employ 7588 transition-edge sensor bolometers 95 GHz...
The Probe of Inflation and Cosmic Origins (PICO) is an imaging polarimeter that will scan the sky for 5 years in 21 frequency bands spread between 799 GHz. It produce full-sky surveys intensity polarization with a final combined-map noise level 0.87 $\mu$K arcmin required specifications, equivalent to 3300 Planck missions, our current best-estimate would have 0.61 (6400 missions). PICO either determine energy scale inflation by detecting tensor scalar ratio at $r=5\times 10^{-4}~(5\sigma)$,...
We introduce and validate a delensing framework for the Simons Observatory (SO), which will be used to improve constraints on inflationary gravitational waves by reducing lensing noise in measurements of $B$ modes CMB polarization. SO initially observe using three small aperture telescopes one large-aperture telescope. While polarization maps from small-aperture constrain waves, internal delens reconstructed data Since obtained dominated subdegree scales, constructs template lensing-induced...
Abstract The detection of primordial B modes the cosmic microwave background (CMB) could provide information about early stages Universe's evolution. faintness this signal requires exquisite calibration accuracy and control instrumental systematic effects which otherwise bias measurements. In work, we study impact an imperfect relative polarisation gain on recovered value tensor-to-scalar ratio r for LiteBIRD experiment, through application blind Needlet Internal Linear Combination (NILC)...
The cosmic microwave background (CMB) experiments have reached an era of unprecedented precision and complexity. Aiming to detect the primordial B-mode polarization signal, these will soon be equipped with $10^{4}$ $10^{5}$ detectors. Consequently, future CMB missions face substantial challenge efficiently processing vast amounts raw data produce initial scientific outputs - sky maps within a reasonable time frame available computational resources. To address this, we introduce...
Using only cosmic microwave background polarization data from the POLARBEAR experiment, we measure $B$-mode delensing on subdegree scales at more than $5\sigma$ significance. We achieve a 14% power variance reduction, highest to date for internal delensing, and improve this result 2% by applying first time an iterative maximum posteriori method. Our analysis demonstrates capability of as means improving constraints inflationary models, paving way optimal next-generation primordial experiments.
Abstract We quantify the calibration requirements for systematic uncertainties next-generation ground-based observatories targeting large-angle B-mode polarization of Cosmic Microwave Background, with a focus on Simons Observatory (SO). explore gain calibration, bandpass center frequencies, and angles, including frequency variation latter across bandpass. find that frequencies must be known to percent levels or less avoid biases tensor-to-scalar ratio r order Δ r∼10 -3 , in line previous...
Observing in six frequency bands from 27 to 280 GHz over a large sky area, the Simons Observatory (SO) is poised address many questions Galactic astrophysics addition its principal cosmological goals. In this work, we provide quantitative forecasts on astrophysical parameters of interest for range science cases. We find that SO can: constrain spectrum polarized dust emission at level $\Delta\beta_d \lesssim 0.01$ and thus test models composition predict $\beta_d$ polarization differs...
Abstract We present a demonstration of the in-flight polarization angle calibration for JAXA/ISAS second strategic large class mission, LiteBIRD , and estimate its impact on measurement tensor-to-scalar ratio parameter, r using simulated data. generate set sky maps with CMB polarized foreground emission, inject instrumental noise offsets to 22 (partially overlapping) frequency channels. Our relies nulling EB cross correlation signal in each channel. This step has been carried out by two...
LiteBIRD is a planned JAXA-led CMB B-mode satellite experiment aiming for launch in the late 2020s, with primary goal of detecting imprint primordial inflationary gravitational waves. Its current baseline focal-plane configuration includes 15 frequency bands between 40 and 402 GHz, fulfilling mission requirements to detect amplitude waves total uncertainty on tensor-to-scalar ratio, $\delta r$, down r<0.001$. A key aspect this performance accurate astrophysical component separation, ability...
We present a measurement of the $B$-mode polarization power spectrum cosmic microwave background (CMB) using taken from July 2014 to December 2016 with POLARBEAR experiment. The CMB spectra are measured observations at 150 GHz an instantaneous array sensitivity $\mathrm{NET}_\mathrm{array}=23\, \mu \mathrm{K} \sqrt{\mathrm{s}}$ on 670 square degree patch sky centered (RA, Dec)=($+0^\mathrm{h}12^\mathrm{m}0^\mathrm{s},-59^\circ18^\prime$). A continuously rotating half-wave plate is used...
ABSTRACT The Cosmic Microwave Background (CMB) primordial B-mode signal is predicted to be much lower than the polarized Galactic emission (foregrounds) in any region of sky pointing need for sophisticated component separation methods. Among them, blind Needlet Internal Linear Combination (NILC) has great relevance given our current poor knowledge foregrounds. However, expected level spatial variability foreground spectral properties complicates NILC subtraction contamination. We therefore...
We use time-domain simulations of Jupiter observations to test and develop a beam reconstruction pipeline for the Simons Observatory Small Aperture Telescopes. The method relies on map maker that estimates subtracts correlated atmospheric noise fitting code designed compensate bias caused by maker. our performance four different frequency bands against various algorithmic parameters, conditions input beams. additionally show quality as function number available investigate how calibration...
Atmosphere is one of the most important noise sources for ground-based cosmic microwave background (CMB) experiments. By increasing optical loading on detectors, it amplifies their effective noise, while its fluctuations introduce spatial and temporal correlations between detected signals. We present a physically motivated 3d-model atmosphere total intensity emission in millimeter sub-millimeter wavelengths. derive new analytical estimate correlation detectors time-ordered data as function...
We combine the latest datasets obtained with different surveys to study frequency dependence of polarized emission coming from Extragalactic Radio Sources (ERS). consider data over a very wide range starting $1.4$ GHz up $217$ GHz. This is particularly interesting since it overlaps frequencies current and forthcoming Cosmic Microwave Background (\cmb) experiments. Current suggest that at high radio frequencies, ($ \nu \geq 20$ GHz) fractional polarization ERS does not depend on total flux...
The Simons Array is a next generation cosmic microwave background (CMB) polarization experiment whose science target precision measurement of the B-mode pattern produced both by inflation and gravitational lensing. As continuation extension successful POLARBEAR experimental program, will consist three cryogenic receivers each featuring multichroic bolometer arrays mounted onto separate 3.5m telescopes. first these, also called POLARBEAR-2A, be to deploy in late 2016 has large diameter focal...