Zobrazeno 1 - 10
of 6 362
pro vyhledávání: '"P. Squire"'
We propose a novel dust battery mechanism for generating seed magnetic fields in the early universe, in which charged dust grains are radiatively accelerated, inducing strong electric currents that subsequently generate magnetic fields. Our analysis
Externí odkaz:
http://arxiv.org/abs/2410.21461
Autor:
Chowdhury, S., Crocker, N. A., Peebles, W. A., Lantsov, R., Rhodes, T. L., Zeng, L., Van Compernolle, B., Tang, S., Pinsker, R. I., Torrezan, A. C., Squire, J., Rupani, R., O'Neill, R., Cengher, M.
A new frequency-stepped Doppler backscattering (DBS) system has been integrated with a real-time steerable electron cyclotron heating launcher to probe local background turbulence (f<10 MHz) and high-frequency (20-550 MHz) density fluctuations in the
Externí odkaz:
http://arxiv.org/abs/2410.13028
We argue that two prominent theories of ion heating in low-$\beta$ collisionless plasmas -- stochastic and quasi-linear heating -- represent similar physical processes in turbulence with different normalized cross helicities. To capture both, we prop
Externí odkaz:
http://arxiv.org/abs/2409.07015
We show that there exist two qualitatively different turbulent states of the zero-net-vertical-flux shearing box. The first, which has been studied in detail previously, is characterized by a weakly magnetized ($\beta\sim50$) midplane with slow perio
Externí odkaz:
http://arxiv.org/abs/2409.05467
Minor ions in the solar corona are heated to extreme temperatures, far in excess of those of the electrons and protons that comprise the bulk of the plasma. These highly non-thermal distributions make minor ions sensitive probes of the underlying col
Externí odkaz:
http://arxiv.org/abs/2408.04703
In real-world elections where voters cast preference ballots, voters often provide only a partial ranking of the candidates. Despite this empirical reality, prior social choice literature frequently analyzes fairness criteria under the assumption tha
Externí odkaz:
http://arxiv.org/abs/2408.03926
The means by which the turbulent cascade of energy is dissipated in the solar wind, and in other astrophysical systems, is a major open question. It has recently been proposed that a barrier to the transfer of energy can develop at small scales, whic
Externí odkaz:
http://arxiv.org/abs/2407.10815
Autor:
Bowen, Trevor A., Vasko, Ivan Y., Bale, Stuart D., Chandran, Benjamin D. G., Chasapis, Alexandros, de Wit, Thierry Dudok, Mallet, Alfred, McManus, Michael, Meyrand, Romain, Pulupa, Marc, Squire, Jonathan
Circularly polarized, nearly parallel propagating waves are prevalent in the solar wind at ion-kinetic scales. At these scales, the spectrum of turbulent fluctuations in the solar wind steepens, often called the transition-range, before flattening at
Externí odkaz:
http://arxiv.org/abs/2406.10446
Autor:
Monselesan, Didier P., Risbey, James S., Legresy, Benoit, Cravatte, Sophie, Pagli, Bastien, Izumo, Takeshi, Chapman, Christopher C., Freund, Mandy, Hannachi, Abdelwaheb, Irving, Damien, Reddy, P. Jyoteeshkumar, Richardson, Doug, Squire, Dougal T., Tozer, Carly R.
El Ni\~no-Southern Oscillation global (ENSO) imprint on sea surface temperature comes in many guises. To identify its tropical fingerprints and impacts on the rest of the climate system, we propose a global approach based on archetypal analysis (AA),
Externí odkaz:
http://arxiv.org/abs/2406.08694
The magnetohydrodynamics (MHD) equations plus 'non-ideal' (Ohmic, Hall, ambipolar) resistivities are widely used to model weakly-ionized astrophysical systems. We show that if gradients in the magnetic field become too steep, the implied charge drift
Externí odkaz:
http://arxiv.org/abs/2405.06026