Results 61 to 70 of about 616 (181)
Messengers of the Universe-Cosmic Rays Exploring Supermassive Black Holes
Galaxies, 2020 Cosmic rays were discovered over one hundred years ago but there are still unsolved problems. One of the hot problems is the origin of cosmic rays of the highest energies.
Anna Uryson
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X-Ray Binaries: A Potential Dominant Contributor to the Cosmic-Ray Spectral Knee Structure
The Astrophysical Journal“PeVatrons” refer to astrophysical sources capable of accelerating particles to energies of ∼PeV and higher, potentially contributing to the cosmic-ray spectrum in the knee region.
Hua Yue +7 more
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Comparative Study of the Dynamics of Cosmic Rays for the Pakistan and China Atmospheric Regions
Journal of Mathematical and Fundamental Sciences, 2020 This paper presents an analysis of cosmic ray intensity in Pakistan air space using spatial interpolation, comparing it with Chinese cosmic ray records from 1984 to 1993.
Faisal Nawaz +4 more
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, 2008 Study of astrophysical objects with strong dipolar magnetic fields show that the spectrum of the accelerated charged particles leaving the sources has a power law form with exponent -2.5, where the exponent is calculated on purely geometrical bases and is independent on the particle species.
openaire +2 more sources
Primordial Cosmic Ray Sources [PDF]
Nature, 1969 New gamma ray observations have provided what may be evidence for primordial cosmic ray sources existing out to redshifts of the order of 100. These sources may be galaxies and quasars in their initial stages of formation. They may have provided the basic energy source for ionizing the intergalactic gas.
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Permafrost and Periglacial Processes, EarlyView.ABSTRACT The Hurd Rock Glacier, located on Livingston Island (South Shetland Islands archipelago, Maritime Antarctica), is a tongue‐shaped feature composed of angular boulders, displaying transverse ridges and furrows, and featuring lobate structures, which are more prominently developed in its frontal sector.
Rosana Menéndez‐Duarte +5 more
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Frontiers in Astronomy and Space SciencesIn Radio Super Novae (RSNe) a magnetic field of (B × r) = 1016.0±0.12 Gauss × cm is observed; these are the same numbers for Blue Super Giant (BSG) star explosions as for Red Super Giant (RSG) star explosions, despite their very different wind properties.
M. Allen +19 more
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The Evolution of Autonomous Systems for Planetary Cave Exploration: A Review
Journal of Field Robotics, EarlyView.ABSTRACT The exploration of Subsurface Access Points (SAPs), such as lava tubes on the Moon and Mars, has gained significant interest due to their potential as stable environments shielded from surface radiation and temperature extremes. These sites are considered high‐value targets for detecting water and signs of ancient life, and assessing their ...
Sarah Swinton +4 more
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Average value of the cosmic ray injection exponent at Galactic sources
EPJ Web of Conferences, 2017 The energy spectrum of high energy cosmic rays emitted by sources change during propagation in the Galaxy. Using the spectrum observed at the Earth and two different transport models, based on anomalous and normal diffusion equations, we have retrieved ...
Lagutin Anatoly, Volkov Nikolay
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Do the LHAASO Galactic diffuse emission data require a contribution from unresolved sources? [PDF]
EPJ Web of ConferencesThe Large High-Altitude Air Shower Observatory (LHAASO) collaboration has recently measured the ultra-high energy gamma-ray diffuse emission (10 − 103 TeV) after masking the contribution of known sources.
Vecchiotti Vittoria +6 more
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