Article
Engineering, Aerospace
Shirin Rahmanian, Tony C. Slaba
Summary: Space radiation poses multiple health risks to astronauts, and the NASA Space Radiation Laboratory has developed a galactic cosmic ray simulator (GCRsim) to better understand and mitigate these risks. The GCRsim can provide a radiation field comparable to the shielded radiation environment within internal organs of astronauts in deep space missions. The study confirms that the GCRsim can provide relatively homogeneous irradiation in larger animals.
Article
Engineering, Aerospace
M. J. Boschini, S. Della Torre, M. Gervasi, G. La Vacca, P. G. Rancoita
Summary: The HELMOD model allows for the description of how solar modulation affects the propagation of galactic cosmic rays in the heliosphere. It provides modulated spectra for different periods and locations, and achieves good agreement with experimental data compared to other models.
ADVANCES IN SPACE RESEARCH
(2022)
Article
Astronomy & Astrophysics
I. S. Gordeev, G. N. Timoshenko
Summary: A new type of space radiation simulator is proposed in the article, which can simulate the distribution and continuous energy spectra of cosmic radiation for research in space radiobiology.
LIFE SCIENCES IN SPACE RESEARCH
(2021)
Article
Astronomy & Astrophysics
I. Briki, M. Mazouz, L. Ghedira
Summary: We report measurements of the angular distributions of low momentum atmospheric muons at 38 m above sea level for zenith angles between -60 and 60 degrees in the south-north direction. The muon detection was performed using two NaI(Tl) scintillation detectors mounted in coincidence. The integrated and differential muon flux were determined by analyzing the deposited energy spectra in the scintillators backed up by a Geant4 simulation of the experimental setup. The results are consistent with the cosn(0) distribution and fill the gap in the geomagnetic cutoff rigidity interval 8 GV < Pc < 14 GV where no similar measurements were performed before. We found that n = 1.88 - 0.12 P mu c in the domain of muon momentum cutoff P mu c < 1 GeV/c. These measurements are useful for muon studies requiring accurate integrated flux.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2023)
Article
Astronomy & Astrophysics
Caina de Oliveira, Vitor de Souza
Summary: This paper investigates the possible mechanisms for the generation of anisotropy signals in the arrival direction of ultra-high-energy cosmic rays. It is found that both nearby active galactic nuclei and starburst galaxies play a role in producing these signals.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2023)
Article
Astronomy & Astrophysics
Caina de Oliveira, Vitor de Souza
Summary: This paper investigates the conditions under which anisotropy signals in the arrival direction of ultra-high-energy cosmic rays could be generated by nearby active galactic nuclei and/or starburst galaxies. The results show that both local AGN and SBG are necessary to explain the observed anisotropy signals, with the contribution of AGN being dominant in most cases and SBG mainly explaining the hotspot measured by the Telescope Array Observatory.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2023)
Article
Astronomy & Astrophysics
P. Sharma, Z. Ou, C. Henry-Cadrot, C. Dubos, T. Suomijaervi
Summary: This study evaluates the contribution of supernova remnants (SNRs) to the acceleration of cosmic rays (CRs) through multiwavelength analysis and different radiative models. The results indicate a preference for hadronic contribution in most SNRs, and identify some SNRs as potential high-energy PeVatron candidates.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2023)
Article
Physics, Multidisciplinary
Bing-Qiang Qiao, Wei Liu, Meng-Jie Zhao, Xiao-Jun Bi, Yi-Qing Guo
Summary: The Tibet ASy experiment has reported the measurement of sub-PeV diffuse gamma-ray emission from the Galactic disk, providing direct evidence for the acceleration of Galactic Cosmic Rays (GCRs) beyond PeV energies. However, there is a tension between the observed sub-PeV diffuse gamma-ray flux and the local CR spectrum, suggesting the need for further investigation and explanation of this phenomenon.
FRONTIERS OF PHYSICS
(2022)
Article
Physics, Multidisciplinary
Bing-Qiang Qiao, Wei Liu, Meng-Jie Zhao, Xiao-Jun Bi, Yi-Qing Guo
Summary: The Tibet AS gamma experiment has reported the measurement of sub-PeV diffuse gamma-ray emission from the Galactic disk, providing direct evidence that Galactic Cosmic Rays (GCRs) can be accelerated beyond PeV energies. However, there is a tension between the sub-PeV diffuse gamma-ray and the local CR spectrum, indicating a need for further investigation.
FRONTIERS OF PHYSICS
(2022)
Review
Public, Environmental & Occupational Health
Lidia Strigari, Silvia Strolin, Alessio Giuseppe Morganti, Alessandro Bartoloni
Summary: Space radiobiology is a crucial interdisciplinary science that examines the biological effects of ionizing radiation on humans in aerospace missions. Dose-effect models play a significant role in optimizing radioprotection strategies and assessing health risks related to human space exploration. Research in this field is essential for reducing damages from cosmic radiation and improving prediction ability for space exposure.
FRONTIERS IN PUBLIC HEALTH
(2021)
Article
Physics, Multidisciplinary
Antonio Ambrosone, Marco Chianese, Damiano F. G. Fiorillo, Antonio Marinelli, Gennaro Miele
Summary: Starburst galaxies are potential sources of high-energy gamma rays, and their cosmic-ray spectrum distortion can be indirectly observed. Current data provide tight bounds on the cross section between protons and dark matter, while future measurements are expected to significantly improve these limits.
PHYSICAL REVIEW LETTERS
(2023)
Article
Engineering, Aerospace
Noelia Ayelen Santos, Sergio Dasso, Adriana Maria Gulisano, Omar Areso, Matias Pereira, Hernan Asorey, Lucas Rubinstein, LAGO collaboration
Summary: A new water-Cherenkov radiation detector at the Argentine Marambio Antarctic Base has been monitoring the variability of galactic cosmic ray flux since 2019. Its main purpose is to provide experimental data for studying the interplanetary transport of cosmic rays during transient events at different space/time scales. This paper introduces the detector and analyzes observations made over one year. After analyzing and correcting for atmospheric conditions, the study focuses on periodicities and modulations due to heliospheric phenomena. Two periods are observed: a 1-day period associated with Earth's rotation and spatial anisotropy of the cosmic ray flux, and a -30-day period due to solar impact and the rotation of the Sun. Through analysis and considering geomagnetic effects, the capability of the detector to observe anisotropies and other interplanetary modulations on cosmic ray flux arriving at Earth is determined.
ADVANCES IN SPACE RESEARCH
(2023)
Article
Astronomy & Astrophysics
Christopher M. Karwin, Thomas Siegert, Jacqueline Beechert, John A. Tomsick, Troy A. Porter, Michela Negro, Carolyn Kierans, Marco Ajello, Israel Martinez-Castellanos, Albert Shih, Andreas Zoglauer, Steven E. Boggs
Summary: This article reports the measurements of the Galactic diffuse continuum emission (GDCE) observed by the Compton Spectrometer and Imager (COSI) during its flight in 2016. The results show overall good agreement with previous measurements and discuss the potential for further research using the COSI balloon data and future satellite missions.
ASTROPHYSICAL JOURNAL
(2023)
Article
Astronomy & Astrophysics
Roman A. Krivonos, Antony J. Bird, Eugene M. Churazov, John A. Tomsick, Angela Bazzano, Volker Beckmann, Guillaume Belanger, Arash Bodaghee, Sylvain Chaty, Erik Kuulkers, Alexander Lutovinov, Angela Malizia, Nicola Masetti, Ilya A. Mereminskiy, Rashid Sunyaev, Sergey S. Tsygankov, Pietro Ubertini, Christoph Winkler
Summary: The INTEGRAL hard X-ray surveys have been crucial in mapping the Galactic plane and providing a sharper view of the hard X-ray sky. By expanding the surveys into shorter time scales, the search for transient X-ray emitters was made possible, contributing to advancements in hard X-ray astronomy.
NEW ASTRONOMY REVIEWS
(2021)
Article
Astronomy & Astrophysics
Aifeng Li, Shiyu Yin, Maoyuan Liu, Hao Wang, Xiaoyu Li, Yaping Li
Summary: Recent measurements of cosmic rays have revealed a complex structure in their spectra and anisotropy. This structure shows enhanced spectral hardness at around 200 GV and softening at around 10 TV. The presence of nearby cosmic ray sources and a local interstellar magnetic field near the solar system play a crucial role in explaining these spectral and anisotropic patterns.
