A5024744383- Dark Matter and Cosmic Phenomena
- Solar and Space Plasma Dynamics
- Astrophysics and Cosmic Phenomena
- Atmospheric Ozone and Climate
- Ionosphere and magnetosphere dynamics
- Cosmology and Gravitation Theories
- Radiation Therapy and Dosimetry
- Geomagnetism and Paleomagnetism Studies
- Particle physics theoretical and experimental studies
- Neutrino Physics Research
- Solar Radiation and Photovoltaics
- Galaxies: Formation, Evolution, Phenomena
- Particle Detector Development and Performance
- Gamma-ray bursts and supernovae
- Atomic and Subatomic Physics Research
- Astro and Planetary Science
- Earthquake Detection and Analysis
- Stellar, planetary, and galactic studies
- Quantum, superfluid, helium dynamics
- Nuclear physics research studies
- Nuclear Physics and Applications
- Astronomical Observations and Instrumentation
- Astrophysics and Star Formation Studies
- Calibration and Measurement Techniques
- Geophysics and Gravity Measurements
University of Milano-Bicocca
2014-2025
Istituto Nazionale di Fisica Nucleare, Sezione di Milano Bicocca
2016-2025
Istituto Nazionale di Fisica Nucleare
2008-2024
Stanford University
2021-2023
Istituto Nazionale di Fisica Nucleare, Laboratori Acceleratori e Superconduttività Applicata
2021-2023
Nordic Institute for Theoretical Physics
2021-2023
Kavli Institute for Particle Astrophysics and Cosmology
2021-2023
Istituto Nazionale di Fisica Nucleare, Sezione di Bologna
2021-2023
University of Iceland
2021-2023
University of Bologna
2021-2023
We present results over an 11-year Solar cycle of cosmic antiprotons based on <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mn>1.1</a:mn><a:mo>×</a:mo><a:msup><a:mn>10</a:mn><a:mn>6</a:mn></a:msup></a:math> events in the rigidity range from 1.00 to 41.9 GV. The <c:math xmlns:c="http://www.w3.org/1998/Math/MathML" display="inline"><c:mover accent="true"><c:mi>p</c:mi><c:mo stretchy="false">¯</c:mo></c:mover></c:math> fluxes exhibit distinct properties. magnitude...
Local interstellar spectra (LIS) for protons, helium, and antiprotons are built using the most recent experimental results combined with state-of-the-art models propagation in Galaxy heliosphere. Two packages, GALPROP HelMod, to provide a single framework that is run reproduce direct measurements of cosmic-ray (CR) species at different modulation levels both polarities solar magnetic field. To do so self-consistent way, an iterative procedure was developed, where LIS output fed into...
Composition and spectra of Galactic cosmic rays (CRs) are vital for studies high-energy processes in a variety environments on different scales, interpretation γ-ray microwave observations, disentangling possible signatures new phenomena, understanding our local neighborhood. Since its launch, AMS-02 has delivered outstanding-quality measurements the p¯ , e±, nuclei: 1H-8O, 10Ne, 12Mg, 14Si. These resulted number breakthroughs; however, heavier nuclei especially low-abundance not expected...
We present the precision measurement of daily proton fluxes in cosmic rays from May 20, 2011 to October 29, 2019 (a total 2824 days or 114 Bartels rotations) rigidity interval 1 100 GV based on 5.5×10^{9} protons collected with Alpha Magnetic Spectrometer aboard International Space Station. The exhibit variations multiple timescales. From 2014 2018, we observed recurrent flux a period 27 days. Shorter periods 9 and 13.5 are 2016. strength all three periodicities changes time rigidity....
We present the precision measurement of 2824 daily helium fluxes in cosmic rays from May 20, 2011 to October 29, 2019 rigidity interval 1.71 100 GV based on 7.6×10^{8} nuclei collected with Alpha Magnetic Spectrometer (AMS) aboard International Space Station. The flux and proton ratio exhibit variations multiple timescales. In nearly all time intervals 2014 2018, we observed recurrent a period 27 days. Shorter periods 9 days 13.5 are 2016. strength three periodicities changes rigidity....
The complex structure of interplanetary magnetic fields and their variability, due to solar activity, make it necessary compute the Cosmic Ray (CR) modulation with numerical simulations. COde for a Speedy Monte Carlo (MC) Involving Cuda Architecture (COSMICA) is MC code, solving backward-in-time system Stochastic Differential Equations (SDE) equivalent Parker Transport Equation (PTE). Graphics Processing Unit (GPU) parallelization COSMICA code game changer in this field because reduces...
The local interstellar spectrum (LIS) of cosmic-ray (CR) electrons for the energy range 1 MeV to TeV is derived using most recent experimental results combined with state-of-the-art models CR propagation in Galaxy and heliosphere. Two packages, GALPROP HelMod, are provide a single framework that run reproduce direct measurements species at different modulation levels, both polarities solar magnetic field. An iterative maximum-likelihood method developed uses GALPROP-predicted LIS as input...
We report the properties of sodium (Na) and aluminum (Al) cosmic rays in rigidity range 2.15 GV to 3.0 TV based on 0.46 million 0.51 nuclei collected by Alpha Magnetic Spectrometer experiment International Space Station. found that Na Al, together with nitrogen (N), belong a distinct ray group. In this group, we observe that, similar N flux, both flux Al are well described sums primary component (proportional silicon flux) secondary fluorine flux). The fraction increases for N, Na, fluxes...
Since its launch, the Alpha Magnetic Spectrometer-02 (AMS-02) has delivered outstanding quality measurements of spectra cosmic-ray (CR) species, $e^{\pm}$, $\bar{p}$, and nuclei (H-Si, S, Fe), which have resulted in a number breakthroughs. Besides elemental spectra, AMS-02 also measures light isotopes albeit within smaller rigidity range. In this paper, we use precise He $^3$He/$^4$He ratio by AMS-02, together with Voyager 1 data, investigate their origin. We show that there is an excess...
Abstract Since its launch, the Alpha Magnetic Spectrometer-02 (AMS-02) has delivered outstanding quality measurements of spectra cosmic-ray (CR) species, e ± , <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:mover accent="true"> <mml:mrow> <mml:mi>p</mml:mi> </mml:mrow> <mml:mo>¯</mml:mo> </mml:mover> </mml:math> and nuclei (H–Si, S, Fe), which have resulted in a number breakthroughs. Besides elemental spectra, AMS-02 also measures light isotopes albeit...
Within the frame of cosmologies where Dark Energy (DE) is a self-interacting scalar field, we allow for CDM-DE coupling and non-zero neutrino masses, simultaneously. In their 0-0 version, i.e. in absence mass, these provide an excellent fit to WMAP, SNIa deep galaxy sample spectra, at least as good ΛCDM. When new degrees freedom are open, find that significant masses (∼ 0.1 eV per ν species) likely option and, some cases, even statistically favoured. Results obtained by using Monte Carlo...
Abstract The cosmic rays propagation inside the heliosphere is well described by a transport equation introduced Parker in 1965. To solve this equation, several approaches were followed past. Recently, Monte Carlo approach became widely used force of its advantages with respect to other numerical methods. In associated fully equivalent set stochastic differential equations (SDE). This describe path quasi‐particle from source, e.g., interstellar space, specific target, detector at Earth. We...
Abstract Local interstellar spectra (LIS) of secondary cosmic-ray (CR) nuclei, lithium, beryllium, boron, and partially nitrogen, are derived in the rigidity range from 10 MV to ∼200 TV using most recent experimental results combined with state-of-the-art models for CR propagation Galaxy heliosphere. The lithium spectrum appears somewhat flatter at high energies compared other species, which may imply a primary component. Two packages, GALPROP H el M od , provide single framework that is run...
Since its launch, the Alpha Magnetic Spectrometer-02 (AMS-02) has delivered outstanding quality measurements of spectra cosmic-ray (CR) species, $\bar{p}$, $e^{\pm}$, and nuclei (H--O, Ne, Mg, Si, Fe), which resulted in a number breakthroughs. The most recent AMS-02 result is measurement spectrum CR fluorine up to $\sim$2 TV. Given very low solar system abundance, CRs thought be mostly secondary, produced fragmentations heavier predominantly Si. Similar best-measured secondary-to-primary...
Forthcoming experiments will enable us to determine tomographic shear spectra at a high precision level. Most predictions about them have until now been biased on algorithms yielding the expected linear and non-linear spectrum of density fluctuations. Even when simulations used, so-called Halofit (Smith et al 2003) fairly large scales needed. We wish go beyond this limitation. perform N-body hydrodynamical within sufficiently cosmological volume allow direct connection between spectra. While...
Local interstellar spectra (LIS) of primary cosmic ray (CR) nuclei, such as helium, oxygen, and mostly carbon are derived for the rigidity range from 10 MV to ~200 TV using most recent experimental results combined with state-of-the-art models CR propagation in Galaxy heliosphere. Two packages, GALPROP HelMod, into a single framework that is used reproduce direct measurements species at different modulation levels, both polarities solar magnetic field. The developed iterative...
We investigate the impact of non-linear corrections on dark energy parameter estimation from weak lensing probes. find that using halofit expressions, suited to ΛCDM models, implies substantial discrepancies with respect results directly obtained N-body simulations, when w(z)≠−1. Discrepancies appear strong models w'(z = 0) > 0, as fiducial models; they are however significant even in neighborhood ΛCDM, where neglecting degrees freedom associated DE state equation can lead a misestimate...
Since its launch, the Alpha Magnetic Spectrometer-02 (AMS-02) has delivered outstanding quality measurements of spectra cosmic-ray (CR) species, $\bar{p}$, $e^{\pm}$, and nuclei (H-Si, Fe), which resulted in a number breakthroughs. The most recent AMS-02 result is measurement CR sodium aluminum up to $\sim$2 TV. Given their low solar system abundances, significant fraction each element produced fragmentations heavier predominantly Ne, Mg, Si. In this paper, we use precise by together with...
A dual component made of non-relativistic particles and a scalar field, exchanging energy, naturally falls onto an attractor solution, making them (sub)dominant part the cosmic energy during radiation dominated era, provided that constant β, measuring coupling, is strong enough. The density parameters both components are then constant, as they expand asa−4. If field prevalently kinetic, expected, its exactly half pressureless component; whole, then, has parameter Ωcd = 3/4β2 (e.g., for β ≃...
The recently published Interstellar Probe (ISP) study report describes a pragmatic mission concept with launch window that starts in 2036 and is expected to reach several hundreds of astronomical units past the heliopause within time frame ≥50 years ( https://interstellarprobe.jhuapl.edu/Interstellar-Probe-MCR.pdf ). Following ISP report, this paper, will also be accessible from Bulletin AAS (BAAS) framework Decadal Survey for Solar Space Physics (Heliophysics) 2024–2033 (Dialynas et al., A...