A5008138585- Galaxies: Formation, Evolution, Phenomena
- Cosmology and Gravitation Theories
- Radio Astronomy Observations and Technology
- Astrophysics and Cosmic Phenomena
- Astrophysics and Star Formation Studies
- Stellar, planetary, and galactic studies
- Dark Matter and Cosmic Phenomena
- Scientific Research and Discoveries
- Astro and Planetary Science
- Superconducting and THz Device Technology
- Astronomy and Astrophysical Research
- Atmospheric Ozone and Climate
- Calibration and Measurement Techniques
- Solar and Space Plasma Dynamics
- Geophysics and Gravity Measurements
- Gamma-ray bursts and supernovae
- Planetary Science and Exploration
- Radioactive Decay and Measurement Techniques
- Neutrino Physics Research
- Astrophysical Phenomena and Observations
- Scientific Measurement and Uncertainty Evaluation
- Astronomical Observations and Instrumentation
- Particle physics theoretical and experimental studies
- Relativity and Gravitational Theory
- Quantum Electrodynamics and Casimir Effect
Trieste Astronomical Observatory
2015-2024
Institute for Fundamental Physics of the Universe
2022-2024
University of Trieste
2007-2023
National Institute for Astrophysics
2007-2021
University of California, Berkeley
2018
Centre National de la Recherche Scientifique
2018
Aix-Marseille Université
2018
University of Illinois Urbana-Champaign
2018
Université Paris Cité
2018
Délégation Paris 7
2018
We present measurements of the cosmic microwave background (CMB) lensing potential using final Planck 2018 temperature and polarization data. Using maps filtered to account for noise anisotropy, we increase significance detection in from 5 σ 9 . Combined with temperature, is detected at 40 an extensive set tests robustness lensing-potential power spectrum, construct a minimum-variance estimator likelihood over multipoles 8 ≤ L 400 (extending range lower compared 2015), which use constrain...
We analyse the Planck full-mission cosmic microwave background (CMB) temperature and E -mode polarization maps to obtain constraints on primordial non-Gaussianity (NG). compare estimates obtained from separable template-fitting, binned, optimal modal bispectrum estimators, finding consistent values for local, equilateral, orthogonal amplitudes. Our combined analysis produces following final results: f NL local = −0.9 ± 5.1; equil −26 47; ortho −38 24 (68% CL, statistical). These results...
Analysis of the Planck 2018 data set indicates that statistical properties cosmic microwave background (CMB) temperature anisotropies are in excellent agreement with previous studies using 2013 and 2015 releases. In particular, they consistent Gaussian predictions $Λ$CDM cosmological model, yet also confirm presence several so-called "anomalies" on large angular scales. The novelty current study, however, lies being a first attempt at comprehensive analysis statistics polarization signal...
We present full-sky maps of the cosmic microwave background (CMB) and polarized synchrotron thermal dust emission, derived from third set Planck frequency maps. These products have significantly lower contamination instrumental systematic effects than previous versions. The methodologies used to derive these follow those described in earlier papers, adopting four methods (Commander, NILC, SEVEM, SMICA) extract CMB component, as well three GNILC, astrophysical components. Our revised...
Euclid is an ESA mission designed to constrain the properties of dark energy and gravity via weak gravitational lensing galaxy clustering. It will carry out a wide area imaging spectroscopy survey (EWS) in visible near-infrared, covering roughly 15,000 square degrees extragalactic sky on six years. The wide-field telescope instruments are optimized for pristine PSF reduced straylight, producing very crisp images. This paper presents building reference survey: sequence pointings EWS, Deep...
We present measurements of the cosmic microwave background (CMB) lensing potential using final $\textit{Planck}$ 2018 temperature and polarization data. increase significance detection in maps from $5\,\sigma$ to $9\,\sigma$. Combined with temperature, is detected at $40\,\sigma$. an extensive set tests robustness lensing-potential power spectrum, construct a minimum-variance estimator likelihood over multipoles $8 \le L 400$. find good consistency between constraints results CMB spectra...
Using the Planck 2015 data release (PR2) temperature maps, we separate Galactic thermal dust emission from cosmic infrared background (CIB) anisotropies. For this purpose, implement a specifically tailored component-separation method, so-called generalized needlet internal linear combination (GNILC) which uses spatial information (the angular power spectra) to disentangle and CIB We produce significantly improved all-sky maps of emission, with reduced contamination, at 353, 545, 857 GHz. By...
We analyse the Planck full-mission cosmic microwave background (CMB) temperature and E-mode polarization maps to obtain constraints on primordial non-Gaussianity (NG). compare estimates obtained from separable template-fitting, binned, modal bispectrum estimators, finding consistent values for local, equilateral, orthogonal amplitudes. Our combined analysis produces following results: f_NL^local = -0.9 +\- 5.1; f_NL^equil -26 47; f_NL^ortho - 38 24 (68%CL, statistical). These results include...
We present the NPIPE processing pipeline, which produces calibrated frequency maps in temperature and polarization from data Planck Low Frequency Instrument (LFI) High (HFI) using high-performance computers. represents a natural evolution of previous analysis efforts, combines some most powerful features separate LFI HFI pipelines. For example, following 2018 procedure, uses foreground priors during calibration stage order to break scanning-induced degeneracies. Similarly, employs...
In this paper we present the Low Frequency Instrument (LFI), designed and developed as part of Planck space mission, ESA program dedicated to precision imaging cosmic microwave background (CMB). Planck-LFI will observe full sky in intensity polarisation three frequency bands centred at 30, 44 70 GHz, while higher frequencies (100-850 GHz) be covered by HFI instrument. The LFI is an array radiometers based on state-of-the-art Indium Phosphide cryogenic HEMT amplifiers implemented a...
The six parameters of the standard $Λ$CDM model have best-fit values derived from Planck temperature power spectrum that are shifted somewhat WMAP data. These shifts driven by features in at angular scales had never before been measured to cosmic-variance level precision. We investigate these determine whether they within range expectation and understand their origin Taking our parameter set be optical depth reionized intergalactic medium $τ$, baryon density $ω_{\rm b}$, matter m}$, size...
Our velocity relative to the rest frame of cosmic microwave background (CMB) generates a dipole temperature anisotropy on sky which has been well measured for more than 30 years, and an accepted amplitude v/c = 0.00123, or v 369km/s. In addition this signal generated by Doppler boosting CMB monopole, our motion also modulates aberrates fluctuations (as as every other source radiation at cosmological distances). This is order 0.1% effect applied are already one part in roughly hundred...
The scientific performance of the Planck Low Frequency Instrument (LFI) after one year in-orbit operation is presented. We describe main optical parameters and discuss photometric calibration, white noise sensitivity, properties. A preliminary evaluation impact systematic effects For each parameters, we outline methods used to obtain them from flight data provide a comparison with pre-launch ground assessments, which are essentially confirmed in flight.
We explore the 2013 Planck likelihood function with a high-precision multi-dimensional minimizer (Minuit). This allows refinement of ΛCDM best-fit solution respect to previously-released results, and construction frequentist confidence intervals using profile likelihoods. The agreement cosmological results from Bayesian framework is excellent, demonstrating robustness statistical methodology. investigate inclusion neutrino masses, where more significant differences may appear due...
Any variation of the fundamental physical constants, and more particularly fine structure constant, $\alpha$, or mass electron, $m_e$, would affect recombination history Universe cause an imprint on cosmic microwave background angular power spectra. We show that Planck data allow one to improve constraint time constant at redshift $z\sim 10^3$ by about a factor 5 compared WMAP data, as well break degeneracy with Hubble $H_0$. In addition we can set $m_{\rm e}$, simultaneous two constants....
We present the current accounting of systematic effect uncertainties for Low Frequency Instrument (LFI) that are relevant to 2015 release Planck cosmological results, showing robustness and consistency our data set, especially polarization analysis. use two complementary approaches: (i) simulations based on measured physical models known effects; (ii) analysis difference maps containing same sky signal ("null-maps"). The LFI temperature limited by instrumental noise. At large angular scales...
We present a final description of the data-processing pipeline for Planck Low Frequency Instrument (LFI), implemented 2018 data release. Several improvements have been made with respect to previous release, especially in calibration process and correction instrumental features such as effects nonlinearity response analogue-to-digital converters. provide brief pedagogical introduction complete pipeline, well detailed important changes implemented. Self-consistency is demonstrated using...
This paper provides an overview of the Low Frequency Instrument (LFI) programme within ESA Planck mission. The LFI instrument has been developed to produce high precision maps microwave sky at frequencies in range 27-77 GHz, below peak cosmic background (CMB) radiation spectrum. scientific goals are described, ranging from fundamental cosmology Galactic and extragalactic astrophysics. design development outlined, together with model philosophy testing strategy. is presented context approach...
We present a system-level description of the Low Frequency Instrument (LFI) considered as differencing polarimeter, and evaluate its expected performance. The LFI is one two instruments on board ESA <i>Planck<i/> mission to study cosmic microwave background. It consists set 22 radiometers sensitive linear polarisation, arranged in orthogonally-oriented pairs connected 11 feed horns operating at 30, 44 70 GHz. In our analysis, generic Jones Mueller-matrix formulations for polarimetry are...
Parity-violating extensions of the standard electromagnetic theory cause in vacuo rotation plane polarization propagating photons. This effect, also known as cosmic birefringence, has an impact on microwave background (CMB) anisotropy angular power spectra, producing non-vanishing T–B and E–B correlations that are otherwise null when parity is a symmetry. Here we present new constraints isotropic rotation, parametrized by angle α, derived from Planck 2015 CMB data. To increase robustness our...
The Planck design and scanning strategy provide many levels of redundancy that can be exploited to tests internal consistency. One the most important is comparison 70 GHz (amplifier) 100 (bolometer) channels. Based on different instrument technologies, with feeds located differently in focal plane, analysed independently by teams using software, near minimum diffuse foreground emission, these channels are effect two experiments. 143 channel has lowest noise level Planck, unresolved emission....