Found 9 entries in the Bibliography.
Showing entries from 1 through 9
| 2020 |
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We propose a turbulence-driven\ solar\ wind model for a fast\ solar\ wind flow in an open coronal hole where the\ solar\ wind flow and the magnetic field are highly aligned. We compare the numerical results of our model with\ Parker\ Solar\ Probe\ measurements of the fast\ solar\ wind flow and find good agreement between them. We find that (1) the majority quasi-2D turbulence is mainly responsible for coronal heating, raising the temperature to about similar to 1 ... Adhikari, L.; Zank, G.; Zhao, L.-L.; YEAR: 2020 DOI: 10.3847/1538-4357/abb132 |
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Spectral Features in Field-aligned Solar Wind Turbulence from Parker Solar Probe Observations Parker Solar Probe (PSP) observed a large variety of Alfv\ enic fluctuations in the fast and slow solar wind flow during its two perihelia. The properties of Alfv\ enic solar wind turbulence have been studied for decades in the near-Earth environment. A spectral index of -5/3 or -2 for magnetic field fluctuations has been observed using spacecraft measurements, which can be explained by turbulence theories of nearly incompressible magnetohydrodynamics (NI MHD) or critical balance. In this study, a rigorous search of field ... Zhao, L.-L.; Zank, G.; Adhikari, L.; Nakanotani, M.; Telloni, D.; Carbone, F.; YEAR: 2020 DOI: 10.3847/1538-4357/ab9b7e interplanetary turbulence; Parker Data Used; parker solar probe; Solar Probe Plus; Solar wind; Spectral index |
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Turbulence Transport Modeling and First Orbit Parker Solar Probe ( PSP ) Observations The Parker Solar Probe (PSP) achieved its first orbit perihelion on 2018 November 6, reaching a heliocentric distance of about 0.165 au (35.55 R☉). Here, we study the evolution of fully developed turbulence associated with the slow solar wind along the PSP trajectory between 35.55 R☉ and 131.64 R☉ in the outbound direction, comparing observations to a theoretical turbulence transport model. Several turbulent quantities, such as the fluctuating kinetic energy and the corresponding cor ... Adhikari, L.; Zank, G.; Zhao, L.-L.; Kasper, J.; Korreck, K.; Stevens, M.; Case, A.; Whittlesey, P.; Larson, D.; Livi, R.; Klein, K.; YEAR: 2020 DOI: 10.3847/1538-4365/ab5852 Parker Data Used; parker solar probe; Physics - Space Physics; Solar Probe Plus |
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The Parker Solar Probe (PSP) observed an interplanetary coronal mass ejection (ICME) event during its first orbit around the Sun, among many other events. This event is analyzed by applying a wavelet analysis technique to obtain the reduced magnetic helicity, cross helicity, and residual energy, the first two of which are magnetohydrodynamics (MHD) invariants. Our results show that the ICME, as a large-scale magnetic flux rope, possesses high magnetic helicity, very low cross helicity, and highly negative residual energy, ... Zhao, L.-L.; Zank, G.; Adhikari, L.; Hu, Q.; Kasper, J.; Bale, S.; Korreck, K.; Case, A.; Stevens, M.; Bonnell, J.; de Wit, Dudok; Goetz, K.; Harvey, P.; MacDowall, R.; Malaspina, D.; Pulupa, M.; Larson, D.; Livi, R.; Whittlesey, P.; Klein, K.; YEAR: 2020 DOI: 10.3847/1538-4365/ab4ff1 Astrophysics - Solar and Stellar Astrophysics; Parker Data Used; parker solar probe; Physics - Space Physics; Solar Probe Plus |
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Predicting the Solar Wind at the Parker Solar Probe Using an Empirically Driven MHD Model Since its launch on 2018 August 12, Parker Solar Probe (PSP) has completed its first and second orbits around the Sun, having reached down to 35.7 solar radii at each perihelion. In anticipation of the exciting new data at such unprecedented distances, we have simulated the global 3D heliosphere using an MHD model coupled with a semi-empirical coronal model using the best available photospheric magnetograms as input. We compare our heliospheric MHD simulation results with in situ measurements along the PSP trajectory from ... Kim, T.; Pogorelov, N.; Arge, C.; Henney, C.; Jones-Mecholsky, S.; Smith, W.; Bale, S.; Bonnell, J.; de Wit, Dudok; Goetz, K.; Harvey, P.; MacDowall, R.; Malaspina, D.; Pulupa, M.; Kasper, J.; Korreck, K.; Stevens, M.; Case, A.; Whittlesey, P.; Livi, R.; Larson, D.; Klein, K.; Zank, G.; YEAR: 2020 DOI: 10.3847/1538-4365/ab58c9 Astrophysics - Solar and Stellar Astrophysics; Parker Data Used; parker solar probe; Physics - Space Physics; Solar Probe Plus |
| 2019 |
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Does Turbulence Turn off at the Alfv\ en Critical Surface? The\ Parker Solar Probe\ (PSP) will eventually reach and cross the Alfv\ en point or surface as it provides us with direct in situ measurements of the solar atmosphere. The Alfv\ en surface is the location at which the large-scale bulk solar wind speed\ YEAR: 2019 DOI: 10.3847/1538-4357/ab141c |
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Does Turbulence Turn off at the Alfv\ en Critical Surface? The\ Parker Solar Probe\ (PSP) will eventually reach and cross the Alfv\ en point or surface as it provides us with direct in situ measurements of the solar atmosphere. The Alfv\ en surface is the location at which the large-scale bulk solar wind speed\ YEAR: 2019 DOI: 10.3847/1538-4357/ab141c |
| 2018 |
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Modeling a Single SEP Event from Multiple Vantage Points Using the iPATH Model Using the recently extended 2D improved Particle Acceleration and Transport in the Heliosphere (iPATH) model, we model an example gradual solar energetic particle event as observed at multiple locations. Protons and ions that are energized via the diffusive shock acceleration mechanism are followed at a 2D coronal mass ejection-driven shock where the shock geometry varies across the shock front. The subsequent transport of energetic particles, including cross-field diffusion, is modeled by a Monte Carlo code that is based ... Hu, Junxiang; Li, Gang; Fu, Shuai; Zank, Gary; Ao, Xianzhi; YEAR: 2018 DOI: 10.3847/2041-8213/aaabc1 parker solar probe; shock waves; Solar Probe Plus; Sun: coronal mass ejections: CMEs; Sun: heliosphere |
| 2015 |
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The Solar Wind Electrons Alphas and Protons (SWEAP) Investigation on Solar Probe Plus is a four sensor instrument suite that provides complete measurements of the electrons and ionized helium and hydrogen that constitute the bulk of solar wind and coronal plasma. SWEAP consists of the Solar Probe Cup (SPC) and the Solar Probe Analyzers (SPAN). SPC is a Faraday Cup that looks directly at the Sun and measures ion and electron fluxes and flow angles as a function of energy. SPAN consists of an ion and electron electrostatic ... Kasper, Justin; Abiad, Robert; Austin, Gerry; Balat-Pichelin, Marianne; Bale, Stuart; Belcher, John; Berg, Peter; Bergner, Henry; Berthomier, Matthieu; Bookbinder, Jay; Brodu, Etienne; Caldwell, David; Case, Anthony; Chandran, Benjamin; Cheimets, Peter; Cirtain, Jonathan; Cranmer, Steven; Curtis, David; Daigneau, Peter; Dalton, Greg; Dasgupta, Brahmananda; DeTomaso, David; Diaz-Aguado, Millan; Djordjevic, Blagoje; Donaskowski, Bill; Effinger, Michael; Florinski, Vladimir; Fox, Nichola; Freeman, Mark; Gallagher, Dennis; Gary, Peter; Gauron, Tom; Gates, Richard; Goldstein, Melvin; Golub, Leon; Gordon, Dorothy; Gurnee, Reid; Guth, Giora; Halekas, Jasper; Hatch, Ken; Heerikuisen, Jacob; Ho, George; Hu, Qiang; Johnson, Greg; Jordan, Steven; Korreck, Kelly; Larson, Davin; Lazarus, Alan; Li, Gang; Livi, Roberto; Ludlam, Michael; Maksimovic, Milan; McFadden, James; Marchant, William; Maruca, Bennet; McComas, David; Messina, Luciana; Mercer, Tony; Park, Sang; Peddie, Andrew; Pogorelov, Nikolai; Reinhart, Matthew; Richardson, John; Robinson, Miles; Rosen, Irene; Skoug, Ruth; Slagle, Amanda; Steinberg, John; Stevens, Michael; Szabo, Adam; Taylor, Ellen; Tiu, Chris; Turin, Paul; Velli, Marco; Webb, Gary; Whittlesey, Phyllis; Wright, Ken; Wu, S.; Zank, Gary; YEAR: 2015 DOI: 10.1007/s11214-015-0206-3 Acceleration; Corona; Heating; Parker Data Used; Solar Probe Plus; Solar wind plasma; SWEAP |
\ and the Alfv\ en speed\ 
Adhikari, L.; 1
