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The influence of the magnetic field shear is studied on the $E\times B$ (and/or Gravitational) and the Current Convective Instabilities (CCI) occuring in the High latitude F-layer ionosphere. It is shown that magnetic shear reduces the…

A dynamic response to a magnetic field of a chain of connected mesoscopic rings is considered. We show that the low frequency behavior corresponds to localization of the elctrons along the chain and to diamagnetic dynamic currents inside…

Condensed Matter · Physics 2009-10-22 S. Kettemann , K. B. Efetov

Using a high cadence imaging spectropolarimetric observation of a sunspot and its surroundings in magnetically sensitive (FeI 6173 A) and insensitive (FeI 7090 A) upper photospheric absorption lines, we map the instantaneous wave phases and…

Solar and Stellar Astrophysics · Physics 2010-09-14 S. P. Rajaguru , R. Wachter , K. Sankarasubramanian , S. Couvidat

We analyze distinct sources of spin-dependent energy level shifts and their impact on the tunneling magnetoresistance (TMR) of interacting quantum dots coupled to collinearly polarized ferromagnetic leads. Level shifts due to virtual charge…

Mesoscale and Nanoscale Physics · Physics 2015-03-19 S. Koller , J. Paaske , M. Grifoni

The location of the terrestrial magnetopause (MP) and it's subsolar stand-off distance depends not only on the solar wind dynamic pressure and the interplanetary magnetic field (IMF), both of which play a crucial role in determining it's…

Space Physics · Physics 2017-09-06 Madhusudan Ingale , P. Janardhan , K. Fujiki , Susanta Kumar Bisoi , Diptiranjan Rout

Time-distance helioseismic measurements in surface- and deep-focus geometries for wave-paths that distinguish surface magnetic contributions from those due to deeper perturbations beneath a large sunspot are presented and analysed. Travel…

Astrophysics · Physics 2008-02-21 S. P. Rajaguru

We show that simple 2 and 3-layer flux-transport dynamos, when forced at the top by a poloidal source term, can produce a widely varying amplitude of toroidal field at the bottom, depending on how close the meridional flow speed of the…

Solar and Stellar Astrophysics · Physics 2015-05-28 Peter A. Gilman , Mausumi Dikpati

The geographic structure of radiation dose rates at aircraft altitudes in Earth's atmosphere during the irradiation of Earth by proton spectra from incoming solar particle events is examined using the recently developed MAIRE+ software.…

Applied Physics · Physics 2022-12-19 Christopher S. W. Davis , Keith Ryden , Fan Lei , Ben Clewer , Alex Hands , Clive Dyer

A microscopic theory of the magnetic-field modulation of critical currents is developed for plane Josephson junctions with anharmonic current-phase relations. The results obtained allow examining temperature-dependent deviations of the…

Superconductivity · Physics 2015-05-18 Yu. S. Barash

The magnetic field of moving vortices in anisotropic superconductors is considered in the framework of time-dependent London approach. It is found that at distances large relative to the core size, the field may change sign that alludes to…

Superconductivity · Physics 2021-10-04 V. G. Kogan , N. Nakagawa

The source fluence distribution of terrestrial gamma ray flashes (TGFs) has been extensively discussed in recent years, but few have considered how the TGF fluence distribution at the source, as estimated from satellite measurements,…

Space Physics · Physics 2016-05-25 R. S. Nisi , N. Østgaard , T. Gjesteland , A. B. Collier

Estimating high resolution models of the Earth's core magnetic field and its time variation in the polar regions requires that one can adequately account for magnetic signals produced by polar ionospheric currents, which vary on a wide…

Space Physics · Physics 2023-09-11 Clemens Kloss , Christopher C. Finlay , Karl M. Laundal , Nils Olsen

The aim of this paper is to extend our previous study of the solar-cycle variations of the meridional flows and to investigate their latitudinal and longitudinal structure in the subphotospheric layer, especially their variations in…

Astrophysics · Physics 2009-11-13 Michal Svanda , Alexander G. Kosovichev , Junwei Zhao

We present a new model of time-dependent flow at low latitudes in the Earth's core between 2000 and 2018, derived from magnetic field measurements made on board the {\it Swarm} and CHAMP satellites and at ground magnetic observatories. The…

Geophysics · Physics 2019-11-11 Clemens Kloss , Christopher Finlay

The present effort explores the influence of a longitudinal applied electric field on the magnetocaloric properties of graphenes. The magnetic entropy change $\Delta S(T,\Delta B,E)$ has two contributions: $S_{cos}(T,B,E)$ with an…

Materials Science · Physics 2015-08-03 M. S. Reis

Wave travel-time shifts in the vicinity of sunspots are typically interpreted as arising predominantly from magnetic fields, flows, and local changes in sound speed. We show here that the suppression of granulation related wave sources in a…

Astrophysics · Physics 2009-11-13 S. M. Hanasoge , S. Couvidat , S. P. Rajaguru , A. C. Birch

Stepwise changes of the photospheric magnetic field, which often becomes more horizontal, have been observed during many flares. Previous interpretations include coronal loops that contract and it has been speculated that such jerks could…

Solar and Stellar Astrophysics · Physics 2017-01-04 Lucia Kleint

On certain extent the behavior of the Adaptive Optics correction for Extremely Large Telescope scales with diameter size. But in Ground Layer Adaptive Optics the combined effect of a Large Field of View and the large overlap of Guide Stars…

Instrumentation and Methods for Astrophysics · Physics 2009-11-19 Carmelo Arcidiacono , Roberto Ragazzoni

We report on the temporal variability of the occurrence of waves at the local proton cyclotron frequency upstream from the Martian bow shock from Mars Global Surveyor observations during the first aerobraking and science phasing orbit…

Forbush decreases (FDs) are short-term reductions in galactic cosmic ray flux caused by interplanetary disturbances. During some interplanetary coronal mass ejection (ICME) events, neutron monitor (NM) data also contain variations produced…

Solar and Stellar Astrophysics · Physics 2026-04-09 Pengwei Zhao , Jie Feng