First results from the Solar Orbiter Heavy Ion Sensor

Livi, S.; Lepri, S. T.; Raines, J. M.; Dewey, R. M.; Galvin, A. B.; Louarn, P.; Collier, M. R.; Allegrini, F.; Alterman, B. L.; Bowers, Charlie; Bruno, R.; Chornay, D.; D’Amicis, R.; Eddy, T. J.; Ellis, L.; Fauchon-Jones, E. J.; Fedorov, A.

doi:10.1051/0004-6361/202346304

Cited by 12 publications

(1 citation statement)

References 90 publications

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“…We quantitatively compare MHD and WSA heliospheric models whose coronal portion is determined from the ADAPT and AFT models by studying the in situ measurements at Parker, SolO, and Earth. Finally, we make use of the composition instrumentation on SolO (SWA-HIS; Livi et al 2023) to map and validate SolO's magnetic connectivity to a source region on the Sun that was observed in a Hinode/ EIS raster. Validation of these connectivity models is critical for understanding solar wind acceleration and heating.…”

Section: Introductionmentioning

confidence: 99%

Assessing the Performance of the ADAPT and AFT Flux Transport Models Using In Situ Measurements from Multiple Satellites

Knizhnik,

Weberg,

Provornikova

et al. 2024

ApJ

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The launches of Parker Solar Probe (Parker) and Solar Orbiter (SolO) are enabling a new era of solar wind studies that track the solar wind from its origin at the photosphere, through the corona, to multiple vantage points in the inner heliosphere. A key ingredient for these models is the input photospheric magnetic field map that provides the boundary condition for the coronal portion of many heliospheric models. In this paper, we perform steady-state, data-driven magnetohydrodynamic (MHD) simulations of the solar wind during Carrington rotation 2258 with the Grid GAMERA model. We use the ADAPT and AFT flux transport models and quantitatively assess how well each model matches in situ measurements from Parker, SolO, and Earth. We find that both models reproduce the magnetic field components at Parker quantitatively well. At SolO and Earth, the magnetic field is reproduced relatively well, though not as well as at Parker, and the density is reproduced extremely poorly. The velocity is overpredicted at Parker, but not at SolO or Earth, hinting that the Wang–Sheeley–Arge (WSA) relation, fine-tuned for Earth, misses the deceleration of the solar wind near the Sun. We conclude that AFT performs quantitatively similarly to ADAPT in all cases, and that both models are comparable to a purely WSA heliospheric treatment with no MHD component. Finally, we trace field lines from SolO back to an active region outflow that was observed by Hinode/EIS, and which shows evidence of elevated charge state ratios.

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Section: Introductionmentioning

confidence: 99%

Assessing the Performance of the ADAPT and AFT Flux Transport Models Using In Situ Measurements from Multiple Satellites

Knizhnik,

Weberg,

Provornikova

et al. 2024

ApJ

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Classification of In-Situ Solar Wind Data Measured by Solar Orbiter/SWA-PAS and HIS Using Machine Learning

Zhao,

Han,

Lepri

et al. 2024

Communications in Computer and Information Science

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The Need for Near-Earth Multi-Spacecraft Heliospheric Measurements and an Explorer Mission to Investigate Interplanetary Structures and Transients in the Near-Earth Heliosphere

Lugaz,

Lee,

Al-Haddad

et al. 2024

Space Sci Rev

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Based on decades of single-spacecraft measurements near 1 au as well as data from heliospheric and planetary missions, multi-spacecraft simultaneous measurements in the inner heliosphere on separations of 0.05–0.2 au are required to close existing gaps in our knowledge of solar wind structures, transients, and energetic particles, especially coronal mass ejections (CMEs), stream interaction regions (SIRs), high speed solar wind streams (HSS), and energetic storm particle (ESP) events. The Mission to Investigate Interplanetary Structures and Transients (MIIST) is a concept for a small multi-spacecraft mission to explore the near-Earth heliosphere on these critical scales. It is designed to advance two goals: (a) to determine the spatiotemporal variations and the variability of solar wind structures, transients, and energetic particle fluxes in near-Earth interplanetary (IP) space, and (b) to advance our fundamental knowledge necessary to improve space weather forecasting from in situ data. We present the scientific rationale for this proposed mission, the science requirements, payload, implementation, and concept of mission operation that address a key gap in our knowledge of IP structures and transients within the cost, launch, and schedule limitations of the NASA Heliophysics Small Explorers program.

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First results from the Solar Orbiter Heavy Ion Sensor

Cited by 12 publications

References 90 publications

Assessing the Performance of the ADAPT and AFT Flux Transport Models Using In Situ Measurements from Multiple Satellites

Assessing the Performance of the ADAPT and AFT Flux Transport Models Using In Situ Measurements from Multiple Satellites

Classification of In-Situ Solar Wind Data Measured by Solar Orbiter/SWA-PAS and HIS Using Machine Learning

The Need for Near-Earth Multi-Spacecraft Heliospheric Measurements and an Explorer Mission to Investigate Interplanetary Structures and Transients in the Near-Earth Heliosphere

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