F. Piacentini
A5026032813- Cosmology and Gravitation Theories
- Galaxies: Formation, Evolution, Phenomena
- Radio Astronomy Observations and Technology
- Astrophysics and Cosmic Phenomena
- Astrophysics and Star Formation Studies
- Superconducting and THz Device Technology
- Dark Matter and Cosmic Phenomena
- Stellar, planetary, and galactic studies
- Astronomy and Astrophysical Research
- Geophysics and Gravity Measurements
- Scientific Research and Discoveries
- Solar and Space Plasma Dynamics
- Gamma-ray bursts and supernovae
- Astrophysical Phenomena and Observations
- Astronomical Observations and Instrumentation
- Atmospheric Ozone and Climate
- Calibration and Measurement Techniques
- Radioactive Decay and Measurement Techniques
- Advanced Thermodynamic Systems and Engines
- Relativity and Gravitational Theory
- Astro and Planetary Science
- Physics of Superconductivity and Magnetism
- Adaptive optics and wavefront sensing
- Spacecraft and Cryogenic Technologies
- GNSS positioning and interference
University of California, San Diego
2020-2024
Sapienza University of Rome
2015-2024
Université Paris Cité
2018-2024
Istituto Nazionale di Fisica Nucleare
2014-2024
Istituto Nazionale di Fisica Nucleare, Sezione di Roma I
2009-2024
University of Rome Tor Vergata
2016-2024
European Space Astronomy Centre
2007-2024
École Normale Supérieure
2018-2024
Sorbonne Université
2024
National Institute of Standards and Technology
2024
We present the first results from science demonstration phase for Hi-GAL survey, <i>Herschel<i/> key program that will map inner Galactic plane of Milky Way in 5 bands. outline our data reduction strategy and some highlights on two observed 2° × tiles approximately centered at <i>l<i/> = 30° 59°. The regions are extremely rich intense highly structured extended emission which shows a widespread organization filaments. Source SEDs can be built hundreds objects fields, physical parameters...
This paper presents a measurement of the angular power spectrum cosmic microwave background from l = 75 to 1025 (~10' 24) combined analysis four 150 GHz channels in BOOMERANG experiment. The contains multiple peaks and minima, as predicted by standard adiabatic inflationary models which primordial plasma undergoes acoustic oscillations. These results, concert with other types cosmological measurements theoretical models, significantly constrain values Ωtot, Ωbh2, Ωch2, ns.
Hi-GAL, the Herschel infrared Galactic Plane Survey, is an Open Time Key Project of Space Observatory. It will make unbiased photometric survey inner plane by mapping a 2° wide strip in longitude range ∣l∣ < 60° five wavebands between 70 μm and 500 μm. The aim Hi-GAL to detect earliest phases formation molecular clouds high-mass stars use optimum combination wavelength coverage, sensitivity, strategy, speed deliver homogeneous census star-forming regions cold structures interstellar medium....
Recent results from BOOMERANG-98 and MAXIMA-1, taken together with COBE DMR, provide consistent high signal-to-noise measurements of the cosmic microwave background power spectrum at spherical harmonic multipole bands over 2<l less similar to 800. Analysis combined data yields 68% (95%) confidence limits on total density, Omega(tot) approximately 1.11+/-0.07 (+0.13)(-0.12), baryon Omega(b)h(2) 0.032(+0.005)(-0.004) (+0.009)(-0.008), scalar spectral tilt, n(s) 1.01(+0.09)(-0.07)...
Thermal images of cold dust in the Central Molecular Zone Milky Way, obtained with far-infrared cameras on board Herschel satellite, reveal a ∼3 × 107 M☉ ring dense and clouds orbiting Galactic center. Using simple toy model, an elliptical shape having semi-major axes 100 60 pc is deduced. The major axis this inclined by about 40° respect to plane sky oriented perpendicular Bar. appears trace system stable x2 orbits predicted for barred potential. Sgr A⋆ displaced geometrical center symmetry...
(Abridged) We present the first public release of high-quality data products (DR1) from Hi-GAL, {\em Herschel} infrared Galactic Plane Survey. Hi-GAL is keystone a suite continuum surveys near-IR to radio, and covers five wavebands at 70, 160, 250, 350 500 micron, encompassing peak spectral energy distribution cold dust for 8 < T 50K. This inner Milky Way in longitude range 68{\deg} > l -70{\deg} |b|<1{\deg} latitude strip. Photometric maps have been produced with ROMAGAL pipeline, that...
The anisotropy of the cosmic microwave background radiation contains information about contents and history universe. We report new limits on cosmological parameters derived from angular power spectrum measured in first Antarctic flight BOOMERANG experiment. Within framework inflation-motivated adiabatic cold dark matter models, using only weakly restrictive prior probabilites age universe Hubble expansion parameter $h$, we find that curvature is consistent with flat primordial fluctuation...
Three peaks and two dips have been detected in the power spectrum of cosmic microwave background by BOOMERANG experiment, at l = (213), (541), (845) (416), (750), respectively. Using model-independent analyses, we find that all five features are statistically significant, measure their location amplitude. These consistent with adiabatic inflationary model. We also calculate mean variance peak dip locations amplitudes a large seven-dimensional parameter space such models, which gives good...
<i>Context. <i/>The High Frequency Instrument (HFI) is one of the two focal instruments <i>Planck<i/> mission. It will observe whole sky in six bands 100 GHz–1 THz range.<i>Aims. HFI instrument designed to measure cosmic microwave background (CMB) with a sensitivity limited only by fundamental sources: photon noise CMB itself and residuals left after removal foregrounds. The high frequency provide full maps submillimetre sky, featuring mainly extended point source Systematic effects must be...
We report measurements of the CMB polarization power spectra from January 2003 Antarctic flight BOOMERANG. The primary results come six days observation a patch covering 0.22% sky centered near R.A. = 82.5 deg., Dec= -45 deg. observations were made using four pairs sensitive bolometers operating in bands at 145 GHz. Using two independent analysis pipelines, we measure non-zero <EE> signal range 100< l <1000 with significance 4.8-sigma, 2-sigma upper limit 8.6 uK^2 for any <BB> contribution,...
We report on observations of the Cosmic Microwave Background (CMB) obtained during January 2003 flight Boomerang . These results are derived from 195 hours observation with four 145 GHz Polarization Sensitive Bolometer (PSB) pairs, identical in design to 143 Planck HFI polarized pixels. The data include 75 distributed over 1.84% sky an additional 120 concentrated central portion field, itself representing 0.22% full sky. From these we derive estimate angular power spectrum temperature...
We use the angular power spectrum of cosmic microwave background, measured during North American test flight Boomerang experiment, to constrain geometry universe. Within class cold dark matter models, we find that overall fractional energy density universe Omega is constrained be 0.85</=Omega</=1.25 at 68% confidence level. Combined with COBE measurement, data on degree scales from Microwave Anisotropy Telescope in Chile, and high-redshift supernovae data, obtain new constraints cosmological...
New observations with <i>Herschel<i/> allow accurate measurement of the equilibrium temperature large dust grains heated by interstellar radiation field (ISRF), which is critical in deriving column density and masses. We present maps derived from SPIRE PACS data two fields along Galactic plane, obtained as part Hi-GAL survey during science demonstration phase (SDP). analyze distribution spatially, well lines-of-sight (LOS) through Galaxy. The zero-level offsets were established comparison...
COrE (Cosmic Origins Explorer) is a fourth-generation full-sky, microwave-band satellite recently proposed to ESA within Cosmic Vision 2015-2025. will provide maps of the microwave sky in polarization and temperature 15 frequency bands, ranging from 45 GHz 795 GHz, with an angular resolution 23 arcmin (45 GHz) 1.3 (795 sensitivities roughly 10 30 times better than PLANCK (depending on channel). The mission lead breakthrough science wide range areas, primordial cosmology galactic...
Hi-GAL is a large-scale survey of the Galactic plane, performed with Herschel in five infrared continuum bands between 70 and 500 $\mu$m. We present band-merged catalogue spatially matched sources their properties derived from fits to spectral energy distributions (SEDs) heliocentric distances, based on photometric catalogs presented Molinari et al. (2016a), covering portion plane $-71.0^{\circ}< \ell < 67.0^{\circ}$. The contains 100922 regular SED, 24584 which show $\mu$m counterpart are...
We present the data reduction pipeline for Hi-GAL survey. is a key project of Herschel satellite which mapping inner part Galactic plane (|l| <= 70\cdot and |b| 1\cdot), using 2 PACS 3 SPIRE frequency bands, from 70{\mu}m to 500{\mu}m. Our relies only partially on Interactive Standard Environment (HIPE) features several newly developed routines perform reduction, including accurate culling, noise estimation minimum variance map-making, latter performed with ROMAGAL algorithm, deep...
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...
Abstract We estimate the efficiency of mitigating lensing B -mode polarization, so-called delensing, for LiteBIRD experiment with multiple external data sets lensing-mass tracers. The current best bound on tensor-to-scalar ratio, r , is limited by rather than Galactic foregrounds. Delensing will be a critical step to improve sensitivity as measurements become more and lensing. In this paper, we extend analysis recent forecast paper include mass tracers, i.e., CMB maps from CMB-S4-like...