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Reconstruction of the Parker spiral with the Reverse in situ data and MHD APproach - RIMAP
- Source :
- Journal of Space Weather and Space Climate, Vol 11, p 7 (2021)
- Publication Year :
- 2021
- Publisher :
- EDP Sciences, 2021.
-
Abstract
- The reconstruction of plasma parameters in the interplanetary medium is very important to understand the interplanetary propagation of solar eruptions and for Space Weather application purposes. Because only a few spacecraft are measuring in situ these parameters, reconstructions are currently performed by running complex numerical Magneto-hydrodynamic (MHD) simulations starting from remote sensing observations of the Sun. Current models apply full 3D MHD simulations of the corona or extrapolations of photospheric magnetic fields combined with semi-empirical relationships to derive the plasma parameters on a sphere centered on the Sun (inner boundary). The plasma is then propagated in the interplanetary medium up to the Earth’s orbit and beyond. Nevertheless, this approach requires significant theoretical and computational efforts, and the results are only in partial agreement with the in situ observations. In this paper we describe a new approach to this problem called RIMAP – Reverse In situ data and MHD APproach. The plasma parameters in the inner boundary at 0.1 AU are derived directly from the in situ measurements acquired at 1 AU, by applying a back reconstruction technique to remap them into the inner heliosphere. This remapping is done by using the Weber and Davies solar wind theoretical model to reconstruct the wind flowlines. The plasma is then re-propagated outward from 0.1 AU by running a MHD numerical simulation based on the PLUTO code. The interplanetary spiral reconstructions obtained with RIMAP are not only in a much better agreement with the in situ observations, but are also including many more small-scale longitudinal features in the plasma parameters that are not reproduced with the approaches developed so far.
- Subjects :
- Atmospheric Science
010504 meteorology & atmospheric sciences
Space weather
Solar wind
Interplanetary medium
lcsh:QC851-999
01 natural sciences
Heliosphere
0103 physical sciences
Coronal mass ejection
Astrophysics::Solar and Stellar Astrophysics
010303 astronomy & astrophysics
0105 earth and related environmental sciences
Physics
Modeling
Coronal mass ejections
Computational physics
Space and Planetary Science
Physics::Space Physics
lcsh:Meteorology. Climatology
Heliospheric current sheet
Astrophysics::Earth and Planetary Astrophysics
Magnetohydrodynamics
Interplanetary spaceflight
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Journal :
- Journal of Space Weather and Space Climate, Vol 11, p 7 (2021)
- Accession number :
- edsair.doi.dedup.....746abda4daa4a5286fa02bf82a4255b0