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相关论文: Geosynchronous magnetopause crossings: necessary c…

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Magnetic clouds (MCs) are observed insitu by spacecraft. The rotation of their magnetic field is typically interpreted as the crossing of a twisted magnetic flux tube, or flux rope, which was launched from the solar corona. The detailed…

空间物理 · 物理学 2022-12-21 V. Lanabere , P. Démoulin , S. Dasso

Polarized Galactic synchrotron emission is an undesirable foreground for cosmic microwave background (CMB) experiments observing at frequencies $< 150$ GHz. We perform a combined analysis of observational data at 1.4, 2.3, 23, 30 and 33 GHz…

宇宙学与河外天体物理 · 物理学 2022-09-07 Janet L. Weiland , Graeme E. Addison , Charles L. Bennett , Mark Halpern , Gary Hinshaw

We perform a detailed modelling of the post-outburst surface emission of the low magnetic field magnetar SGR 0418+5729. The dipolar magnetic field of this source, B=6x10^12 G estimated from its spin-down rate, is in the observed range of…

高能天体物理现象 · 物理学 2015-07-13 Sebastien Guillot , Rosalba Perna , Nanda Rea , Daniele Vigano , Jose Pons

Magnetic clouds (MCs) are transient magnetic structures giving the strongest southward magnetic field (Bz south) in the solar wind. The sheath regions of MCs may also carry southward magnetic field. Southward magnetic field is responsible…

太阳与恒星天体物理 · 物理学 2018-10-09 Y. Li , J. G. Luhmann , B. J. Lynch

This work aims at acquiring a more complete understanding of how lateral heterogeneities of the CMB heat flux affect the geodynamo while other relevant parameters are pushed towards realistic values. For this purpose, we ran geodynamo…

地球与行星天体物理 · 物理学 2025-01-03 Thomas Frasson , Natanaël Schaeffer , Henri-Claude Nataf , Stéphane Labrosse

Following the basic principles of a charge separated pulsar magnetosphere \citep{goldreich1969}, we consider the magnetosphere be stationary in space, instead of corotating, and the electric field be uploaded from the potential distribution…

高能天体物理现象 · 物理学 2015-07-01 K. H. Tsui

Since its formation 4.6 billion years ago, our solar system has most likely crossed numerous magnetized interstellar clouds and bubbles of different sizes and contents on its path through the Milky Way. Having a reference model for how the…

太阳与恒星天体物理 · 物理学 2012-10-03 Lotfi Ben-Jaffel , Romana Ratkiewicz

We identify a dayside electron diffusion region (EDR) encountered by the Magnetospheric Multiscale (MMS) mission and estimate the terms in generalized Ohm's law that controlled energy conversion near the X-point. MMS crossed the…

The joint extremal spatial dependence of wind speed and significant wave height in the North East Atlantic is quantified using Metop satellite scatterometer and hindcast observations for the period 2007-2018, and a multivariate spatial…

统计方法学 · 统计学 2022-02-16 Rob Shooter , Emma Ross , Agustinus Ribal , Ian R. Young , Philip Jonathan

The current work investigates the Venusian solar-wind-induced magnetosphere at a high spatial resolution using all Venus Express (VEX) magnetic observations through an unbiased statistical method. We first evaluate the predictability of the…

空间物理 · 物理学 2021-12-20 Maosheng He , Joachim Vogt , Eduard Dubinin , Tielong Zhang , Zhaojin Rong

Flux transfer events (FTEs) are the manifestation of bursty and/or patchy magnetic reconnection at the magnetopause. We compare two sequences of the ionospheric signatures of flux transfer events observed in global auroral imagery and…

空间物理 · 物理学 2016-06-01 S. E. Milan , S. M. Imber , J. A. Carter , M. -T. Walach , B. Hubert

This study aims at the early diagnostics of geoeffectiveness of coronal mass ejections (CMEs) from quantitative parameters of the accompanying EUV dimming and arcade events. We study events of the 23th solar cycle, in which major…

太阳与恒星天体物理 · 物理学 2012-11-09 I. M. Chertok , V. V. Grechnev , A. V. Belov , A. A. Abunin

Magnetic reconnection (MR) and the associated concurrently occurring waves have been extensively studied at large-scale plasma boundaries, in quasi-symmetric and asymmetric configurations in the terrestrial magnetotail and at the…

In the recent years, global coronal models have experienced an ongoing increase in popularity as tools for forecasting solar weather. Within the domain of up to 21.5Rsun, magnetohydrodynamics (MHD) is used to resolve the coronal structure…

太阳与恒星天体物理 · 物理学 2022-11-30 Michaela Brchnelova , Błażej Kuźma , Barbara Perri , Andrea Lani , Stefaan Poedts

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…

天体物理学 · 物理学 2008-02-21 S. P. Rajaguru

We present an analysis of local properties of magnetic reconnection at the dayside magnetopause for various interplanetary magnetic field (IMF) orientations in global magnetospheric simulations. This has heretofore not been practical…

空间物理 · 物理学 2016-07-27 Colin M. Komar , Paul A. Cassak

We study the nearest-neighbor spin-ice model subjected to a magnetic field applied along the global [111] and [110] directions, focusing on the role of sample geometry in stabilizing topological phase transitions. While no Kasteleyn…

统计力学 · 物理学 2026-04-30 R. A. Borzi , E. S. Loscar , S. A. Grigera

Observations of the Faraday rotation measure, combined with the dispersion measure, can be used to infer the magnetoionic environment of a radio source. We investigate the magnetoionic environments of FRBs by deriving their estimated…

高能天体物理现象 · 物理学 2020-10-14 Wei-Yang Wang , Bing Zhang , Xuelei Chen , Renxin Xu

Extreme space weather events on Earth occur during intervals of strong solar wind driving. The solar wind drives plasma convection and currents in the near-Earth space environment. For low values of the driver, the Earth's response is…