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Journal articles on the topic 'Cosmic Rays, CALET, Interaction Point'

Author: Grafiati
Published: 14 March 2023

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1

Tatischeff, Vincent, and Stefano Gabici. "Particle Acceleration by Supernova Shocks and Spallogenic Nucleosynthesis of Light Elements." Annual Review of Nuclear and Particle Science 68, no. 1 (2018): 377–404. http://dx.doi.org/10.1146/annurev-nucl-101917-021151.

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In this review, we first reassess the supernova remnant paradigm for the origin of Galactic cosmic rays in the light of recent cosmic-ray data acquired by the Voyager 1 spacecraft. We then describe the theory of light-element nucleosynthesis by nuclear interaction of cosmic rays with the interstellar medium and outline the problem of explaining the measured beryllium abundances in old halo stars of low metallicity with the standard model of the Galactic cosmic-ray origin. We then discuss the various cosmic-ray models proposed in the literature to account for the measured evolution of the light
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2

BARBIERI, JAMES, GEORGE CHAPLINE, and DAVID I. SANTIAGO. "QUANTUM CRITICALITY, EVENT HORIZONS AND COSMIC GAMMA RAY BURSTS." Modern Physics Letters A 18, no. 39 (2003): 2767–73. http://dx.doi.org/10.1142/s0217732303012489.

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The logical inconsistency of quantum mechanics and general relativity can be avoided if the relativity principle fails for length scales smaller than the quantum coherence length for the vacuum state. This has dramatic consequences for the phenomenology of compact astrophysical objects. If we assume that at the Planck scale elementary particles interact via a universal four-point interaction and baryon number conservation is violated, then nucleons approaching an event horizon surface can disintegrate into gamma rays and high energy leptons. Integrating the Altarelli–Parisi equations to find t
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3

Fiorillo, Damiano F. G., Mauricio Bustamante, and Victor B. Valera. "Near-future discovery of point sources of ultra-high-energy neutrinos." Journal of Cosmology and Astroparticle Physics 2023, no. 03 (2023): 026. http://dx.doi.org/10.1088/1475-7516/2023/03/026.

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Abstract Upcoming neutrino telescopes may discover ultra-high-energy (UHE) cosmic neutrinos, with energies beyond 100 PeV, in the next 10–20 years. Finding their sources would identify guaranteed sites of interaction of UHE cosmic rays, whose origin is unknown. We search for sources by looking for multiplets of UHE neutrinos arriving from similar directions. Our forecasts are state-of-the-art, geared at neutrino radio-detection in IceCube-Gen2. They account for detector energy and angular response, and for critical, but uncertain backgrounds. Sources at declination of -45° to 0° will be easies
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4

SALTZBERG, DAVID, Katsushi Arisaka, Ron Bain, et al. "INTRODUCTION TO THE SALSA, A SALTDOME SHOWER ARRAY AS A GZK NEUTRINO OBSERVATORY." International Journal of Modern Physics A 21, supp01 (2006): 252–53. http://dx.doi.org/10.1142/s0217751x06033726.

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The observed spectrum of ultra-high energy cosmic rays virtually guarantees the presence of ultra-high energy neutrinos due to their interaction with the cosmic microwave background. Every one of these neutrinos will point back to its source and, unlike cosmic rays, will arrive at the Earth unattenuated, from sources perhaps as distant as z =20. The neutrino telescopes currently under construction, should discover a handful of these events, probably too few for detailed study. In this talk I will describe how an array of VHF and UHF antennas embedded in a large salt dome, SalSA (Saltdome Showe
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5

de Naurois, Mathieu. "TeV observations of the Galactic center and starburst galaxies." Proceedings of the International Astronomical Union 9, S303 (2013): 29–42. http://dx.doi.org/10.1017/s1743921314000118.

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AbstractThe vicinity of the Galactic center harbors many potential accelerators of cosmic rays (CR) that could shine in very-high-energy (VHE) γ-rays, such as pulsar wind nebulae, supernova remnants, binary systems and the central black hole Sgr A*, and is characterized by high gas density, large magnetic fields and a high rate of starburst activity similar to that observed in the core of starburst galaxies. In addition to these astrophysical sources, annihilation of putative WIMPs concentrated in the gravitational well could lead to significant high-energy emission at the Galactic center. The
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Barlykov, N., V. Dudin, T. Enik, et al. "MiniSPD Stand for Testing Si-Detectors." Nonlinear Phenomena in Complex Systems 25, no. 3 (2022): 254–65. http://dx.doi.org/10.33581/1561-4085-2022-25-3-254-265.

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SPD (Spin Physics Detector) collaboration proposes to install a universal setup in the second interaction point of the NICA collider under construction (JINR, Dubna) to study the spin structure of the proton and deuteron. It plans to carry out research of spin-related phenomena with polarized proton and deuteron beams at a collision energy up to 27 GeV and a luminosity up to 1032 cm−2 s−1. MiniSPD stand is manufactured as a setup for testing SPD detector prototypes with cosmic muons at LHEP. It allows to carry out checkout of the Data Acquisition System (DAQ), the Detector Control System (DCS)
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7

Gusev, А. I., and O. I. Guseva. "NEMESIS APPROXIMATED TO SUN." Globus 7, no. 2(59) (2021): 4–11. http://dx.doi.org/10.52013/2658-5197-59-2-1.

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Photographs of double Sun lead in paper that it took off with Prohodnaja Griva of Gornyy Altay (near c. Belokurikha). Evidences of approaching second Sun – Nemesis to our Shine. Influence of Nemesis on the cosmic events in Sun system are very impression that its testify about interaction of two stars and influence second Sun on the planets of Sun system. Powerful emissions of plasma in view concentration rays with side of our Sun and separation blue spectrums clots with Nemesis that it point on the essential helium component. Myself Nemesis can to be carry to class B – white-blue giants. Anoma
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8

Fehérkuti, Anna, Gábor I. Veres, Ralf Ulrich, and Tanguy Pierog. "Feasibility Studies of Charge Exchange Measurements in pp Collisions at the LHC." Entropy 24, no. 9 (2022): 1188. http://dx.doi.org/10.3390/e24091188.

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(1) Pions produced in the development of extended atmospheric cosmic ray air showers subsequently decay to muons. The measured yield of those muons is generally underestimated by current phenomenological models and event generators optimized for cosmic ray physics. The importance of those disagreements motivates the feasibility studies for testing these models at the Large Hadron Collider (LHC) energies, at the highest center-of-mass energies achievable in a laboratory. The interaction of a nucleus and a virtual pion created in a charge exchange reaction at the LHC is a similar process to thos
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9

Chalov, S. V., H. J. Fahr, and Y. G. Malama. "Unexpected sites of efficient stochastic acceleration in the inner heliosheath." Annales Geophysicae 25, no. 3 (2007): 575–80. http://dx.doi.org/10.5194/angeo-25-575-2007.

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Abstract. Up until the recent past, it was generally believed that the solar wind termination shock (TS) is the favourite site to accelerate ions from the keV- to the MeV- energy levels by means of Fermi-1 processes. When Voyager 1 was crossing the TS at the end of 2004, the registrations of this spacecraft showed, however, that beyond the shock passage fluxes of anomalous cosmic rays kept increasing with time. This obviously called for an acceleration site further downstream of the shock in the heliosheath which had not been identified before. In this paper we thus investigate the process of
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10

Nam, J. W., C. C. Chen, C. H. Chen, et al. "Design and implementation of the TAROGE experiment." International Journal of Modern Physics D 25, no. 13 (2016): 1645013. http://dx.doi.org/10.1142/s0218271816450139.

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Taiwan astroparticle radiowave observatory for geo-synchrotron emissions (TAROGE) is an antenna array on the high mountains of Taiwan’s east coast for the detection of ultra-high energy cosmic rays (UHECRs) in an energy above [Formula: see text] eV. The antennas point toward the ocean to detect radiowave signals emitted by the UHECR-induced air-shower as a result of its interaction with the geomagnetic field. Looking down from the coastal mountain, the effective area is enhanced by collecting both direct-emission as well as the ocean-reflected signals. This instrument also provides the capabil
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11

Kulikovskiy, Vladimir. "ANTARES and KM3NeT programs for the supernova neutrino detection." Proceedings of the International Astronomical Union 12, S331 (2017): 339–44. http://dx.doi.org/10.1017/s1743921317004495.

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AbstractThe currently working ANTARES neutrino telescope has capabilities to detect neutrinos produced in astrophysical transient sources. Neutrino alerts are regularly generated to trigger multi-wavelength observatories. Potential sources include gamma-ray bursts, core-collapse supernovae, and flaring active galactic nuclei. In particular, the neutrino detection together with the multi-wavelength observations may reveal hidden jets in the supernova explosions.Supernovae remnants are currently the most promising acceleration sites of the cosmic rays in our Galaxy. The neutrino emission is expe
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12

Pais, Matteo, Christoph Pfrommer, Kristian Ehlert, Maria Werhahn, and Georg Winner. "Constraining the coherence scale of the interstellar magnetic field using TeV gamma-ray observations of supernova remnants." Monthly Notices of the Royal Astronomical Society 496, no. 2 (2020): 2448–61. http://dx.doi.org/10.1093/mnras/staa1678.

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ABSTRACT Galactic cosmic rays (CRs) are believed to be accelerated at supernova remnant (SNR) shocks. In the hadronic scenario, the TeV gamma-ray emission from SNRs originates from decaying pions that are produced in collisions of the interstellar gas and CRs. Using CR-magnetohydrodynamic simulations, we show that magnetic obliquity-dependent shock acceleration is able to reproduce the observed TeV gamma-ray morphology of SNRs such as Vela Jr and SN1006 solely by varying the magnetic morphology. This implies that gamma-ray bright regions result from quasi-parallel shocks (i.e. when the shock p
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13

Sahakyan, N. "Origin of the multiwavelength emission of PKS 0502+049." Astronomy & Astrophysics 622 (February 2019): A144. http://dx.doi.org/10.1051/0004-6361/201834606.

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The origin of the multiwavelength emission from PKS 0502+049 neighboring the first cosmic neutrino source TXS 0506+056 is studied using the data observed byFermi-Large Area Telescope andSwiftUltraViolet/Optical Telescope and X-Ray Telescope. This source was in a flaring state in the considered bands before and after the neutrino observations in 2014–2015, characterized by hard emission spectra in the X-ray andγ-ray bands, ≃1.5 − 1.8 and ≤2.0, respectively. During the neutrino observations, theγ-ray spectrum shows a deviation from a simple power-law shape, indicating a spectral cutoff atEc = 8.
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14

Dell’Ova, P., A. Gusdorf, M. Gerin, et al. "Interstellar anatomy of the TeV gamma-ray peak in the IC443 supernova remnant." Astronomy & Astrophysics 644 (December 2020): A64. http://dx.doi.org/10.1051/0004-6361/202038339.

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Context. Supernova remnants (SNRs) represent a major feedback source from stars in the interstellar medium of galaxies. During the latest stage of supernova explosions, shock waves produced by the initial blast modify the chemistry of gas and dust, inject kinetic energy into the surroundings, and may alter star formation characteristics. Simultaneously, γ-ray emission is generated by the interaction between the ambient medium and cosmic rays (CRs), including those accelerated in the early stages of the explosion. Aims. We study the stellar and interstellar contents of IC443, an evolved shell-t
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15

Clark, J. S., B. W. Ritchie, and I. Negueruela. "A VLT/FLAMES survey for massive binaries in Westerlund 1." Astronomy & Astrophysics 635 (March 2020): A187. http://dx.doi.org/10.1051/0004-6361/201935903.

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Context. The formation, properties, and evolution of massive stars remain subject to considerable theoretical and observational uncertainty. This impacts on fields as diverse as galactic feedback, the production of cosmic rays, and the nature of the progenitors of both electromagnetic and gravitational wave transients. Aims. The young massive clusters many such stars reside within provide a unique laboratory for addressing these issues. In this work we provide a comprehensive stellar census of Westerlund 1 in order to to underpin such efforts. Methods. We employed optical spectroscopy of a lar
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16

Accolla, M., G. Pellegrino, G. A. Baratta, et al. "Combined IR and XPS characterization of organic refractory residues obtained by ion irradiation of simple icy mixtures." Astronomy & Astrophysics 620 (December 2018): A123. http://dx.doi.org/10.1051/0004-6361/201834057.

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Context. Multi-year laboratory experiments have demonstrated that frozen icy mixtures containing simple organic and inorganic molecules (such as H2O, N2, CH4, CO, CO2, C2H6, etc.), if exposed to a flux of energetic ions or UV photons, give rise to new more complex molecules at low temperatures (10–50 K). A fraction of the new synthesized molecules is volatile while the remaining fraction is refractory and therefore it is preserved after the warm-up of the substrate to room temperature. Moreover, a part of the refractory material is formed during the annealing to room temperature, when molecule
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17

Stein, Y., R. J. Dettmar, M. Weżgowiec, et al. "CHANG-ES." Astronomy & Astrophysics 632 (November 26, 2019): A13. http://dx.doi.org/10.1051/0004-6361/201935558.

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Context. The radio continuum halos of edge-on spiral galaxies have diverse morphologies, with different magnetic field properties and cosmic ray (CR) transport processes into the halo. Aims. Using the Continuum HAloes in Nearby Galaxies – an EVLA Survey (CHANG-ES) radio continuum data from the Karl G. Jansky Very Large Array (VLA) in two frequency bands, 6 GHz (C-band) and 1.5 GHz (L-band), we analyzed the radio properties, including polarization and the transport processes of the CR electrons (CREs), in the edge-on spiral galaxy NGC 4013. Supplementary LOw-Frequency ARray (LOFAR) data at 150
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18

Sarmah, Prantik, Sovan Chakraborty, and Jagdish C. Joshi. "Probing LHAASO galactic PeVatrons through gamma-ray and neutrino correspondence." Monthly Notices of the Royal Astronomical Society, February 27, 2023. http://dx.doi.org/10.1093/mnras/stad609.

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Abstract Recently, Large High Altitude Air Shower Observatory (LHAASO) has detected several Galactic point sources of ultra high energy (UHE; Eγ > 100 TeV) gamma-rays. These gamma-rays are possibly created in leptonic or hadronic interactions of cosmic rays (CRs) of PeV energies. In the hadronic channel (p − p interaction), the gamma-rays are accompanied by neutrinos. The detection of neutrinos is therefore crucial in understanding CR acceleration in such objects. To estimate the neutrino flux, we adopt the two LHAASO sources (J2226+6057, J1908+0621) found to be spatially associated wit
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19

Ge, Ting-Ting, Xiao-Na Sun, Rui-Zhi Yang, Yun-Feng Liang та En-Wei Liang. "Diffuse γ-ray emission around the massive star forming region of Carina Nebula Complex". Monthly Notices of the Royal Astronomical Society, 10 жовтня 2022. http://dx.doi.org/10.1093/mnras/stac2885.

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Abstract We report the Fermi Large Area Telescope (Fermi-LAT) detection of the γ-ray emission toward the massive star forming region of Carina Nebula Complex (CNC). Using the latest source catalog and diffuse background models, we found that the GeV γ-ray emission in this region can be resolved into three different components. The GeV γ-ray emission from the central point source is considered to originate from the η Carina (η Car). We further found the diffuse GeV γ-ray emission around the CNC which can be modelled by two Gaussian disks with radii of 0.4○ (region A) and 0.75○ (region B), respe
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20

Yeung, Paul K. H., Aya Bamba, and Hidetoshi Sano. "Multiwavelength studies of G298.6−0.0: An old GeV supernova remnant interacting with molecular clouds." Publications of the Astronomical Society of Japan, March 3, 2023. http://dx.doi.org/10.1093/pasj/psad006.

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Abstract Hadronic γ-ray sources associated with supernova remnants (SNRs) can serve as stopwatches for the escape of cosmic rays from SNRs, which gradually develops from highest-energy particles to lowest-energy particles with time. In this work, we analyze the 13.7 yr Fermi-LAT data to investigate the γ-ray feature in/around the SNR G298.6−0.0 region. With γ-ray spatial analyses, we detect three point-like components. Among them, Src-NE is at the eastern SNR shell, and Src-NW is adjacent to the western edge of this SNR. Src-NE and Src-NW demonstrate spectral breaks at energies around/below 1.
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21

Komitov, Boris, and Vladimir Kaftan. ""Danjon Effect", Solar-Triggered Volcanic Activity, and Relation to Climate Change." Russian Journal of Earth Sciences, December 23, 2022, 1–12. http://dx.doi.org/10.2205/2022es000803.

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The “Danjon effect” is a phenomenon that presents a tendency to concentrate the so-called “dark” total lunar eclipses (DTLE) near solar sunspot cycle minimum phases. It was a starting point for the present study, whose main subject is a statistical analysis of relationship between solar and volcanic activity for the maximum long time. To this end, the Smithsonian National Museum of Natural History's volcanic activity catalog was used. On its basis, a time series of the total annual volcanic eruptions for the period 1551–2020 AD has been built and explored for cycles of possible solar origin. C
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