Results 111 to 120 of about 2,583 (231)

Analytical Verification of the Normal Vector Determination Methods for Planar Magnetic Structures

The Astrophysical Journal
Minimum variance analysis of magnetic fields (MVAB) is conventionally implemented to determine the normal vector of a planar magnetic structure (PMS) for which the average of the normal magnetic field component vanishes (i.e., $\left\langle {B}_{n}\right\
Wai-Leong Teh
doaj   +1 more source

Evolution of Coronal and Interplanetary Magnetic Fields [PDF]

Symposium - International Astronomical Union, 1980
Numerous studies have provided the detailed information necessary for a substantive synthesis of the empirical relation between the magnetic field of the sun and the structure of the interplanetary field. We will point out the latest techniques and studies of the global solar magnetic field and its relation to the interplanetary field. The potential to
openaire   +1 more source

VLF, magnetic bay and Pi2 substorm signatures at auroral and midlatitude ground stations [PDF]

, 2002
A superposed epoch analysis of 100–300 substorms is performed to determine the median size and shape of the substorm-associated VLF chorus, magnetic bay, and Pi2 pulsation burst observed at the near-auroral Halley research station, Antarctica, and at the
Freeman, M.P., Hunter, S., Smith, A.J., Milling, D.K.   +3 more
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Non-Parker Spiral Interplanetary Magnetic Field Configurations Observed in Near-Earth Space: Statistical Features of Their Occurrence and Solar Wind Conditions

The Astrophysical Journal Supplement Series
In near-Earth space, the interplanetary magnetic field (IMF) is generally characterized by the Parker spiral configuration with a spiral angle of approximately 45° clockwise from the radial axis of the Sun.
Jong-Sun Park, Quanqi Shi, Jungjoon Seough, Hui Zhang, Tao Tang, Ruilong Guo, Kyung-Suk Cho, Dong-Hun Lee, Khan-Hyuk Kim   +8 more
doaj   +1 more source

Contribution of Alfvénic Waves on the Formation and Deflection of Switchbacks: Insights from Two Decades of WIND Spacecraft Data

The Astrophysical Journal Letters
Switchbacks, characterized by large-angle deflections of the local interplanetary magnetic field relative to the background, are frequently observed throughout the heliosphere and play a crucial role in the solar wind dynamics.
Hui Li, Fanzhuo Dai, Chi Wang, Wence Jiang, Haoyu Li   +4 more
doaj   +1 more source

The investigation of quasi-separatrix layers in solar magnetic fields

, 2011
The structure of the magnetic field is often an important factor in many energetic processes in the solar corona. To determine the topology of the magnetic field features such as null points, separatrix surfaces, and separators must be found.
Restante, Anna Lisa
core  

Surface Waves at Switchback Boundaries in the Young Solar Wind from Parker Solar Probe Observations

The Astrophysical Journal
Switchbacks (SBs) are localized magnetic field deflections in the solar wind, marked by abrupt changes in the magnetic field direction relative to the ambient solar wind.
Kyung-Eun Choi, Oleksiy V. Agapitov, Nina Bizien, Thierry Dudok de Wit, Lucas Colomban   +4 more
doaj   +1 more source

The mean solar magnetic field as an indicator of the interplanetary magnetic field

Annals of Geophysics, 1996
The Mean Solar Magnetic Field (MSMF) measured daily by ground based observations at the Standford Observatory shows similar structures like the Interplanetary Magnetic Field (IMF) near the Earth about 5 to 7 days later. The ionospheric effect in the mid-latitude F2-region due to such MSMF changes is most marked for strong MSMF changes from anti to pro ...
openaire   +3 more sources

Reply to comment by H. Hasegawa on "Evolution of Kelvin-Helmholtz activity on the dusk flank magnetopause" [PDF]

, 2009
We demonstrate, on experimental grounds, that the justifications for the comment by Hasegawa [2009], hereinafter H09, on work done by Foullon et al.
Foullon, Claire, Owen, Christopher J., C. J. Owen, R. B. Torbert, Fazakerley, Andrew, Farrugia, Charlie J., Fazakerley, A. N., C. J. Farrugia, F. T. Gratton, Fazakerley, A. N., Gratton, Fausto Tulio Livio, Torbert, Roy Banks, C. Foullon, Foullon, C., Farrugia, Charles J., Owen, C. J. (Christopher J.), Farrugia, C. J., Gratton, F.T., Torbert, R.B., Torbert, Roy B., A. N. Fazakerley, Gratton, F. T., Foullon, C. (Claire), Farrugia, C. J. (Charles John), Owen, C. J., Owen, C. J.   +25 more
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Proton Temperature and Density Variations in Linear Magnetic Holes in the Solar Wind

The Astrophysical Journal
Linear magnetic holes (LMHs) are pressure-balanced structures characterized by reduced magnetic pressure and compensatory thermal pressure enhancements, driven by proton temperature and/or density variations.
RuiHui Yu, Xin Wang, Hua Zhang, Yu Zhang
doaj   +1 more source