Results 161 to 170 of about 1,963,432 (340)
High-energy astrophysics and the search for sources of gravitational waves. [PDF]
Philos Trans A Math Phys Eng Sci, 2018 O'Brien PT, Evans P.
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High energy astrophysical processes
, 2005 We briefly review the high energy astrophysical processes that are related to the production of high energy $ $-ray and neutrino signals and are likely to be important for the energy loss of high and ultrahigh energy cosmic rays. We also give examples for neutrino fluxes generated by different astrophysical objects and describe the cosmological link ...
openaire +2 more sources
HIGH ENERGY APPROACHES TO LOW ENERGY PHENOMENA IN ASTROPHYSICS [PDF]
, 2002 SAM M. AUSTIN
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The DNA of Calabi–Yau Hypersurfaces
Fortschritte der Physik, Volume 74, Issue 2, February 2026.Abstract Genetic Algorithms are implemented for triangulations of four‐dimensional reflexive polytopes, which induce Calabi–Yau threefold hypersurfaces via Batyrev's construction. These algorithms are shown to efficiently optimize physical observables such as axion decay constants or axion–photon couplings in string theory compactifications.
Nate MacFadden +2 more
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Earth and Space Science, Volume 13, Issue 2, February 2026.Abstract The radar surface echo can be separated into coherent and incoherent components by statistical approaches, and the coherent component can be described by a backscattering model related to the RMS height. According to backscattering models for fractal surfaces, the coherent power in decibels decreases with RMS height on a scale independent of ...
Tiansheng Hong +9 more
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Ultrahigh Energy Neutrinos and Cosmic Rays as Probes of New Physics
, 2001 Cosmic high energy neutrinos are inextricably linked to the origin of cosmic rays which is one of the major unresolved questions in astrophysics. In particular, the highest energy cosmic rays observed possess macroscopic energies and their origin is ...
Sigl, G.
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AGU Advances, Volume 7, Issue 1, February 2026.Abstract The continuous increase in atmospheric methane (CH4) concentrations over the past few decades has become a major concern due to its strong role as a greenhouse gas contributing to climate change. In this work, we investigate the changes in the global methane budget using a global chemistry‐climate model constrained with methane and its ...
Jian He +2 more
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Black Holes and High Energy Physics: From Astrophysics to Large Extra Dimensions [PDF]
, 2017 Michael F. Wondrak +2 more
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Seasonal Ice Cover Could Allow Liquid Lakes to Persist in a Cold Mars Paleoclimate
AGU Advances, Volume 7, Issue 1, February 2026.Abstract Geomorphic and stratigraphic studies of Mars prove that extensive liquid water flowed and pooled on the surface early in Mars' history. Martian paleoclimate models, however, have difficulty simulating climate conditions warm enough to maintain liquid water on early Mars.
Eleanor L. Moreland +8 more
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AGU Advances, Volume 7, Issue 1, February 2026.Abstract Energetic electron precipitation plays a pivotal role in shaping Earth's radiation belt dynamics and drives significant physical and chemical changes in the upper atmosphere. However, the detailed mechanisms governing the loss of relativistic electrons have remained unclear, largely due to the limited energy coverage and coarse resolution of ...
Zheng Xiang +13 more
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