Imperial College London
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Dr Lorenzo Matteini

Faculty of Natural Sciences, Department of Physics

Lecturer in Space Plasma Physics
 
 
 
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Contact

 

l.matteini

 
 
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Location

 

Blackett LaboratorySouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Woolley:2020:mnras/staa2770,
author = {Woolley, T and Matteini, L and Horbury, TS and Bale, SD and Woodham, LD and Laker, R and Alterman, BL and Bonnell, JW and Case, AW and Kasper, JC and Klein, KG and Martinovi, MM and Stevens, M},
doi = {mnras/staa2770},
journal = {Monthly Notices of the Royal Astronomical Society},
pages = {5524--5531},
title = {Proton core behaviour inside magnetic field switchbacks},
url = {http://dx.doi.org/10.1093/mnras/staa2770},
volume = {498},
year = {2020}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - During Parker Solar Probe’s first two orbits there are widespread observations of rapid magnetic field reversals known as switchbacks. These switchbacks are extensively found in the near-Sun solar wind, appear to occur in patches, and have possible links to various phenomena such as magnetic reconnection near the solar surface. As switchbacks are associated with faster plasma flows, we questioned whether they are hotter than the background plasma and whether the microphysics inside a switchback is different to its surroundings. We have studied the reduced distribution functions from the Solar Probe Cup instrument and considered time periods with markedly large angular deflections, to compare parallel temperatures inside and outside switchbacks. We have shown that the reduced distribution functions inside switchbacks are consistent with a rigid velocity space rotation of the background plasma. As such, we conclude that the proton core parallel temperature is very similar inside and outside of switchbacks, implying that a T-V relationship does not hold for the proton core parallel temperature inside magnetic field switchbacks. We further conclude that switchbacks are consistent with Alfvénic pulses travelling along open magnetic field lines. The origin of these pulses, however, remains unknown. We also found that there is no obvious link between radial Poynting flux and kinetic energy enhancements suggesting that the radial Poynting flux is not important for the dynamics of switchbacks.
AU  - Woolley,T
AU  - Matteini,L
AU  - Horbury,TS
AU  - Bale,SD
AU  - Woodham,LD
AU  - Laker,R
AU  - Alterman,BL
AU  - Bonnell,JW
AU  - Case,AW
AU  - Kasper,JC
AU  - Klein,KG
AU  - Martinovi,MM
AU  - Stevens,M
DO  - mnras/staa2770
EP  - 5531
PY  - 2020///
SN  - 0035-8711
SP  - 5524
TI  - Proton core behaviour inside magnetic field switchbacks
T2  - Monthly Notices of the Royal Astronomical Society
UR  - http://dx.doi.org/10.1093/mnras/staa2770
UR  - http://hdl.handle.net/10044/1/83408
VL  - 498
ER  -
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