Results 121 to 130 of about 17,761 (262)
A new type of exact arbitrarily inhomogeneous cosmology: evolution of deceleration in the flat homogeneous-on-average case [PDF]
, 2012 Charles Hellaby
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Journal of Geophysical Research: Space Physics, Volume 131, Issue 5, May 2026.Abstract A number of external sources and internal circulation mechanisms have been proposed to explain the well‐known semiannual variation in global mean thermospheric densities. We use the polarity of the Y $Y$‐component (dawn to dusk) of the Interplanetary Magnetic Field (IMF) in the Geocentric Solar Equatorial (GSEQ) frame to identify the influence,
Mike Lockwood +4 more
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When can we compute analytically lookback time, age of the universe, and luminosity distance? [PDF]
Eur Phys J C Part Fields, 2022 Jose S, Leblanc A, Faraoni V.
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BTZ black holes and flat space cosmologies in higher derivative theories [PDF]
, 2017 Céline Zwikel
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Spatially flat cosmological quantum spacetimes
Physical Review DWe recently described a cosmological quantum spacetime of vanishing spatial curvature, which can be considered as background for the Ishibashi-Kitazawa-Kawai-Tsuchiya (IKKT) matrix model, assuming that the resulting gauge theory couples weakly. Building on this example, we construct a large class of spatially flat cosmological quantum spacetimes.
Christian Gaß, Harold C. Steinacker
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Detection of Equatorial Plasma Bubbles Using the COSMIC‐2 Rate of TEC Index
Journal of Geophysical Research: Space Physics, Volume 131, Issue 5, May 2026.Abstract Equatorial plasma bubbles (EPBs) are large‐scale plasma depletion structures that can disrupt Global Navigation Satellite Systems (GNSS) and other space‐based technologies. Several instruments have been employed to study EPB dynamics, with Total Electron Content (TEC) and Rate of TEC change Index (ROTI) data standing out as valuable parameters
Ana L. Christovam +2 more
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Journal of Geophysical Research: Space Physics, Volume 131, Issue 5, May 2026.Abstract On 23 November 2022, during exceptionally quiet geomagnetic conditions, a distinct ultra‐low frequency (ULF) wave in the Pc5 band (∼2.4 mHz) was observed in the duskside sub‐auroral region by two Canadian SuperDARN (Super Dual Auroral Radar Network) radars.
N. Nishitani +18 more
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Proposed physical mechanism that gives rise to cosmic inflation. [PDF]
Sci Rep, 2023 Law BM.
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Effect of Field Line Torsion on the Polarization of ULF Waves
Journal of Geophysical Research: Space Physics, Volume 131, Issue 5, May 2026.Abstract In this paper we suggest a simple modification of the dipole magnetic field which introduces field‐aligned currents and torsion to the field lines. The resulting field lines are not contained in the meridional planes and have resemblance to the geomagnetic field lines in the dawn and dusk flanks of the magnetosphere. We analyze polarization of
K. Kabin, A. W. Degeling, R. Rankin
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FRW bulk viscous cosmology with modified Chaplygin gas in flat space [PDF]
, 2012 H. Saadat, B. Pourhassan
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