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Found 30 entries in the Bibliography.
Showing entries from 1 through 30
| 2023 |
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The supersonic solar wind, first predicted by Parker and then observed by Mariners, extends to form a heliosphere around the Sun. The energy supply from the energy containing range, the energy cascade though the inertial range, and the eventual energy dissipation are three basic processes of the energy transfer in the solar wind and have been studied for a long time. However, some basic issues remain to be discovered. Here, we review the recent progress in the mechanisms of energy transfer of the solar wind turbulence from t ... Wu, Honghong; Tu, Chuanyi; He, Jiansen; Wang, Xin; Yang, Liping; Published by: Physics of Plasmas Published on: feb YEAR: 2023 DOI: 10.1063/5.0121140 |
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A Data-constrained Scheme for the Reconstruction of Solar Wind Parameters in the Inner Heliosphere With the development of our industrial society, the reconstruction of solar wind parameters in the inner heliosphere becomes very important to understanding the interplanetary propagation of various types of space weather disturbance. However, the situ observations of solar wind parameters are only applicable to several points where spacecraft are located. Therefore, we have to rely on the numerical technologies to reconstruct the solar wind parameters. The scheme for the reconstruction of solar wind parameters can be classi ... Zhang, Man; Feng, Xueshang; Yang, Liping; Liu, Xiaojing; Published by: \apjs Published on: feb YEAR: 2023 DOI: 10.3847/1538-4365/acaddc |
| 2022 |
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Exact laws for evaluating cascade rates, tracing back to the Kolmogorov 4/5 law, have been extended to many systems of interest including magnetohydrodynamics (MHD), and compressible flows of the magnetofluid and ordinary fluid types. It is understood that implementations may be limited by the quantity of available data and by the lack of turbulence symmetry. Assessment of the accuracy and feasibility of such third-order (or Yaglom) relations is most effectively accomplished by examining the von K\ arm\ an-Howarth equati ... Wang, Yanwen; Chhiber, Rohit; Adhikari, Subash; Yang, Yan; Bandyopadhyay, Riddhi; Shay, Michael; Oughton, Sean; Matthaeus, William; Cuesta, Manuel; Published by: \apj Published on: oct YEAR: 2022 DOI: 10.3847/1538-4357/ac8f90 Parker Data Used; interplanetary turbulence; Space plasmas; Plasma physics; Magnetohydrodynamics; Magnetohydrodynamical simulations; 830; 1544; 2089; 1964; 1966; Physics - Space Physics; Physics - Fluid Dynamics; Physics - Plasma Physics |
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The Dynamic Structure of Coronal Hole Boundaries The boundaries of solar coronal holes are difficult to uniquely define observationally but are sites of interest in part because the slow solar wind appears to originate there. The aim of this article is to explore the dynamics of interchange magnetic reconnection at different types of coronal hole boundaries- namely streamers and pseudostreamers-and their implications for the coronal structure. We describe synthetic observables derived from three-dimensional magnetohydrodynamic simulations of the atmosphere of the Sun in wh ... Aslanyan, V.; Pontin, D.~I.; Scott, R.~B.; Higginson, A.~K.; Wyper, P.~F.; Antiochos, S.~K.; Published by: \apj Published on: jun YEAR: 2022 DOI: 10.3847/1538-4357/ac69ed Parker Data Used; Solar Physics; Solar magnetic reconnection; Solar corona; Solar coronal holes; Slow solar wind; Magnetohydrodynamics; 1476; 1504; 1483; 1484; 1873; 1964 |
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The von K\ arm\ an-Howarth equations give a starting basis for the classical turbulence theory. The formula for the magnetohydrodynamics von K\ arm\ an decay rate represents an energy source in many solar wind models with turbulence as the driver. However, it still lacks the radial trend comparison between the von K\ arm\ an decay rate, the energy supply rate, and the perpendicular heating rate based on direct observations of the solar wind. Here we carry out this kind of comparison for the first time using Parker Solar Prob ... Wu, Honghong; Tu, Chuanyi; He, Jiansen; Wang, Xin; Yang, Liping; Published by: \apj Published on: feb YEAR: 2022 DOI: 10.3847/1538-4357/ac4413 |
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Solar Chromospheric Network as a Source for Solar Wind Switchbacks Recent studies suggest that the magnetic switchbacks (SBs) detected by the Parker Solar Probe carry information on the scales of solar supergranulation (large scale) and granulation (medium scale). We test this claim using high-resolution H\ensuremath\alpha images obtained with the visible spectropolarimeters of the Goode Solar Telescope in Big Bear Solar Observatory. As possible solar sources, we count all the spicule-like features standing along the chromospheric networks near the coronal hole boundary visible in the H\ens ... Lee, Jeongwoo; Yurchyshyn, Vasyl; Wang, Haimin; Yang, Xu; Cao, Wenda; Oliveros, Juan; Published by: \apjl Published on: aug YEAR: 2022 DOI: 10.3847/2041-8213/ac86bf Parker Data Used; Solar magnetic fields; Solar chromosphere; Solar wind; interplanetary magnetic fields; 1503; 1479; 1534; 824 |
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The Dynamic Coupling of Streamers and Pseudostreamers to the Heliosphere The slow solar wind is generally believed to result from the interaction of open and closed coronal magnetic flux at streamers and pseudostreamers. We use three-dimensional magnetohydrodynamic simulations to determine the detailed structure and dynamics of open-closed interactions that are driven by photospheric convective flows. The photospheric magnetic field model includes a global dipole giving rise to a streamer together with a large parasitic polarity region giving rise to a pseudostreamer that separates a satellite co ... Aslanyan, V.; Pontin, D.~I.; Higginson, A.~K.; Wyper, P.~F.; Scott, R.~B.; Antiochos, S.~K.; Published by: \apj Published on: apr YEAR: 2022 DOI: 10.3847/1538-4357/ac5d5b Parker Data Used; Solar Physics; Solar magnetic reconnection; Solar corona; Solar coronal holes; Magnetohydrodynamics; Slow solar wind; 1476; 1504; 1483; 1484; 1964; 1873; Astrophysics - Solar and Stellar Astrophysics; Physics - Space Physics |
| 2021 |
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We report nonlinear wave-wave coupling related to whistler-mode or electron Bernstein waves in the near-Sun slow solar wind with Parker Solar Probe (PSP) data. Prominent plasma wave power enhancements usually exist near the electron gyrofrequency (f$_ce$), identified as electrostatic whistler-mode and electron Bernstein waves (Malaspina et al. 2020). We find that these plasma waves near f$_ce$ typically have a harmonic spectral structure and further classify them into three types identified by the characteristics of wave fre ... Ma, Jiuqi; Gao, Xinliang; Yang, Zhongwei; Tsurutani, Bruce; Liu, Mingzhe; Lu, Quanming; Wang, Shui; Published by: \apj Published on: sep YEAR: 2021 DOI: 10.3847/1538-4357/ac0ef4 |
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Solar Origin of Compressive Alfv\ enic Spikes/Kinks as Observed by Parker Solar Probe The solar wind is found by the Parker Solar Probe to be abundant with Alfv\ enic velocity spikes and magnetic field kinks. Temperature enhancement is another remarkable feature associated with the Alfv\ enic spikes. How the prototype of these coincident phenomena is generated intermittently in the source region is an important and wide-ranging subject. Here we propose a new model introducing guide-field discontinuity into the interchange magnetic reconnection between open funnels and closed loops with different magnetic heli ... He, Jiansen; Zhu, Xingyu; Yang, Liping; Hou, Chuanpeng; Duan, Die; Zhang, Lei; Wang, Ying; Published by: \apjl Published on: may YEAR: 2021 DOI: 10.3847/2041-8213/abf83d Parker Data Used; Solar wind; Alfven waves; Solar atmosphere; Solar magnetic reconnection; 1534; 23; 1477; 1504 |
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We report analysis of sub-Alfv\ enic magnetohydrodynamic (MHD) perturbations in the low-\ensuremath\beta radial-field solar wind employing the Parker Solar Probe spacecraft data from 2018 October 31 to November 12. We calculate wavevectors using the singular value decomposition method and separate MHD perturbations into three eigenmodes (Alfv\ en, fast, and slow modes) to explore the properties of sub-Alfv\ enic perturbations and the role of compressible perturbations in solar wind heating. The MHD perturbations show a high ... Zhao, S.~Q.; Yan, Huirong; Liu, Terry; Liu, Mingzhe; Shi, Mijie; Published by: \apj Published on: dec YEAR: 2021 DOI: 10.3847/1538-4357/ac2ffe Parker Data Used; 1534; 830; 1964; 1544; 1636; Astrophysics - Solar and Stellar Astrophysics; Physics - Plasma Physics; Physics - Space Physics |
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The fluctuations observed in the slow solar wind at 1 au by the WIND spacecraft are shown by recent studies to consist of mainly magnetic-field directional turning and magnetic-velocity alignment structure (MVAS). How these structures are created has been a question because the nature of the fluctuations in the near-Sun region remains unknown. Here, we present an analysis of the measurements in the slow solar wind from 0.1-0.3 au by Parker Solar Probe during its first six orbits. We present the distributions in the $C_\mathr ... Wu, Honghong; Tu, Chuanyi; Wang, Xin; Yang, Liping; Published by: \apj Published on: dec YEAR: 2021 DOI: 10.3847/1538-4357/ac3331 |
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A Provably Positive, Divergence-free Constrained Transport Scheme for the Simulation of Solar Wind In this paper, we present a provably positive, divergence-free constrained transport (CT) scheme to simulate the steady-state solar wind ambient with the three-dimensional magnetohydrodynamics numerical model. The positivity can be lost in two ways: one way is in the reconstruction process, and the other is in the updating process when the variables are advanced to the next time step. We adopt a self-adjusting strategy to bring the density and pressure into the permitted range in the reconstruction process, and use modified ... Zhang, Man; Feng, Xueshang; Liu, Xiaojing; Yang, Liping; Published by: \apjs Published on: dec YEAR: 2021 DOI: 10.3847/1538-4365/ac1e29 Parker Data Used; Solar wind; Magnetohydrodynamical simulations; 1534; 1966 |
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Large Amplitude Switchback Turbulence: Possible Magnetic Velocity Alignment Structures Switchbacks are widely acknowledged phenomena observed by the Parker Solar Probe and appear to occur in patches. Previous studies focused on the fluctuations at the magnetic reversals. However, the nature of the fluctuations inside the switchbacks remains unknown. Here we utilize the magnetic field data and plasma data measured by the Parker Solar Probe in the first four encounters. We investigate the fluctuations in the switchback intervals of 100 s with $B_R 0$ at every instant and compare them to the fluctuations in the n ... Wu, Honghong; Tu, Chuanyi; Wang, Xin; Yang, Liping; Published by: The Astrophysical Journal Published on: 06/2021 YEAR: 2021 DOI: 10.3847/1538-4357/abec6c Parker Data Used; Solar wind; interplanetary turbulence; 1534; 830; Astrophysics - Solar and Stellar Astrophysics; Physics - Plasma Physics; Physics - Space Physics |
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The Parker Solar Probe (PSP) aims to explore the nascent solar wind close to the Sun. Meanwhile, PSP is also expected to encounter small objects like comets and asteroids. In this work, we survey the ephemerides to find the chance of a recent encounter and then model the interaction between released dusty plasmas and solar wind plasmas. On 2019 September 2, a comet-like object, the 322P/Solar and Heliosphere Observatory, just passed its perihelion flying to a heliocentric distance of 0.12 au and swept by PSP at a relative di ... He, Jiansen; Cui, Bo; Yang, Liping; Hou, Chuanpeng; Zhang, Lei; Ip, Wing-Huen; Jia, Ying-Dong; Dong, Chuanfei; Duan, Die; Zong, Qiugang; Bale, Stuart; Pulupa, Marc; Bonnell, John; de Wit, Thierry; Goetz, Keith; Harvey, Peter; MacDowall, Robert; Malaspina, David; Published by: The Astrophysical Journal Published on: 03/2021 YEAR: 2021 DOI: 10.3847/1538-4357/abdf4a Parker Data Used; Solar wind; Comet tails; Interplanetary dust; Asteroids; 1534; 274; 821; 72; Astrophysics - Earth and Planetary Astrophysics; Astrophysics - Solar and Stellar Astrophysics; Physics - Space Physics |
| 2020 |
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Investigating the Chromospheric Footpoints of the Solar Wind Bryans, Paul; McIntosh, Scott; Brooks, David; De Pontieu, Bart; Published by: \apjl Published on: 12/2021 YEAR: 2020 DOI: 10.3847/2041-8213/abce69 Quiet solar chromosphere; Solar magnetic fields; Solar coronal holes; Solar corona; 1986; 1503; 1484; 1483 |
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The Parker Solar Probe (PSP) mission has been studied since 1958. After many iterations and changes in design, the mission was launched on August 12, 2018 (see, https://www.nasa.gov/content/goddard/parker-solar-probe). PSP has completed its 3rd rendezvous with Venus and 6th perihelion passage. Each flyby brings PSP closer to the Sun (eventually to 9.7 solar radii). In October 2020 it flew within 20 solar radii of the solar surface. A goal of the mission is to determine how the solar corona is heated to ∼ a million degrees. ... Goldstein, Melvyn; Ruffolo, D.; Matthaeus, W.~H.; Chhiber, R.; Usmanov, A.~V.; Yang, Y.; Bandyopadhyay, R.; Parashar, T.~N.; DeForest, E.; Wan, M.; Chasapis, A.; Maruca, B.~A.; Velli, M.; Kasper, J.~C.; Published by: Radiation Effects and Defects in Solids Published on: 11/2020 YEAR: 2020 DOI: 10.1080/10420150.2020.1845690 |
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Energy Supply for Heating the Slow Solar Wind Observed by Parker Solar Probe between 0.17 and 0.7 au Energy supply sources for the heating process in the slow solar wind remain unknown. The Parker Solar Probe (PSP) mission provides a good opportunity to study this issue. Recently, PSP observations have found that the slow solar wind experiences stronger heating inside 0.24 au. Here for the first time we measure in the slow solar wind the radial gradient of the low-frequency breaks on the magnetic trace power spectra and evaluate the associated energy supply rate. We find that the energy supply rate is consistent with the ob ... Wu, Honghong; Tu, Chuanyi; Wang, Xin; He, Jiansen; Yang, Liping; Published by: The Astrophysical Journal Published on: 11/2020 YEAR: 2020 DOI: 10.3847/2041-8213/abc5b6 Parker Data Used; Slow solar wind; interplanetary turbulence; Solar coronal heating |
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Shear-driven Transition to Isotropically Turbulent Solar Wind Outside the Alfv\ en Critical Zone Motivated by prior remote observations of a transition from striated\ solar\ coronal structures to more isotropic "flocculated" fluctuations, we propose that the dynamics of the inner\ solar\ wind just outside the Alfven critical zone, and in the vicinity of the first beta = 1 surface, is powered by the relative velocities of adjacent coronal magnetic flux tubes. We suggest that large-amplitude flow contrasts are magnetically constrained at lower altitude but shear-driven dynamics are triggered as such ... Ruffolo, D.; Matthaeus, W.; Chhiber, R.; Usmanov, A.; Yang, Y.; Bandyopadhyay, R.; Parashar, T.; Goldstein, M.; Deforest, C.; Wan, M.; Chasapis, A.; Maruca, B.; Velli, M.; Kasper, J.; Published by: The Astrophysical Journal Published on: 10/2020 YEAR: 2020 DOI: 10.3847/1538-4357/abb594 |
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Microinstabilities and waves excited at moderate-Mach-number perpendicular shocks in the near-Sun solar wind are investigated by full particle-in-cell simulations. By analyzing the dispersion relation of fluctuating field components directly issued from the shock simulation, we obtain key findings concerning wave excitations at the shock front: (1) at the leading edge of the foot, two types of electrostatic (ES) waves are observed. The relative drift of the reflected ions versus the electrons triggers an electron cyclotro ... Yang, Zhongwei; Liu, Ying; Matsukiyo, Shuichi; Lu, Quanming; Guo, Fan; Liu, Mingzhe; Xie, Huasheng; Gao, Xinliang; Guo, Jun; Published by: The Astrophysical Journal Published on: 09/2020 YEAR: 2020 DOI: 10.3847/2041-8213/abaf59 Interplanetary shocks; parker solar probe; Plasma astrophysics; Plasma physics; Solar Probe Plus; Space plasmas |
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Pathways to Dissipation in Weakly Collisional Plasmas Matthaeus, William; Yang, Yan; Wan, Minping; Parashar, Tulasi; Bandyopadhyay, Riddhi; Chasapis, Alexandros; Pezzi, Oreste; Valentini, Francesco; Published by: \apj Published on: 03/2020 YEAR: 2020 DOI: 10.3847/1538-4357/ab6d6a |
| 2019 |
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Role of magnetic field curvature in magnetohydrodynamic turbulence Yang, Yan; Wan, Minping; Matthaeus, William; Shi, Yipeng; Parashar, Tulasi; Lu, Quanming; Chen, Shiyi; Published by: Physics of Plasmas Published on: 08/2019 YEAR: 2019 DOI: 10.1063/1.5099360 Parker Data Used; Physics - Space Physics; Astrophysics - Solar and Stellar Astrophysics; Physics - Plasma Physics |
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Pezzi, O.; Yang, Y.; Valentini, F.; Servidio, S.; Chasapis, A.; Matthaeus, W.~H.; Veltri, P.; Published by: Physics of Plasmas Published on: 07/2019 YEAR: 2019 DOI: 10.1063/1.5100125 Parker Data Used; Physics - Plasma Physics; Physics - Space Physics |
| 2018 |
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Deep-space exploration of the inner heliosphere is in an unprecedented golden age, with the recent and forthcoming launches of the Parker Solar Probe (PSP) and Solar Orbiter (SolO) missions, respectively. In order to both predict and understand the prospective observations by PSP and SolO, we perform forward MHD modeling of the 3D inner heliosphere at solar minimum, and synthesize the white-light (WL) emission that would result from Thomson scattering of sunlight from the coronal and heliospheric plasmas. Both solar rotat ... Xiong, Ming; Davies, Jackie; Feng, Xueshang; Li, Bo; Yang, Liping; Xia, Lidong; Harrison, Richard; Hayashi, Keiji; Li, Huichao; Zhou, Yufen; Published by: The Astrophysical Journal Published on: 12/2018 YEAR: 2018 DOI: 10.3847/1538-4357/aae978 magnetohydrodynamics: MHD; methods: numerical; Parker Data Used; parker solar probe; Solar Probe Plus; Solar wind; Sun: corona; Sun: heliosphere |
| 2017 |
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Exploring the statistics of magnetic reconnection X-points in kinetic particle-in-cell turbulence Haggerty, C.~C.; Parashar, T.~N.; Matthaeus, W.~H.; Shay, M.~A.; Yang, Y.; Wan, M.; Wu, P.; Servidio, S.; Published by: Physics of Plasmas Published on: 10/2017 YEAR: 2017 DOI: 10.1063/1.5001722 |
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Energy transfer, pressure tensor, and heating of kinetic plasma Yang, Yan; Matthaeus, William; Parashar, Tulasi; Haggerty, Colby; Roytershteyn, Vadim; Daughton, William; Wan, Minping; Shi, Yipeng; Chen, Shiyi; Published by: Physics of Plasmas Published on: 07/2017 YEAR: 2017 DOI: 10.1063/1.4990421 Parker Data Used; Physics - Plasma Physics; Astrophysics - Solar and Stellar Astrophysics; Physics - Space Physics |
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Energy transfer channels and turbulence cascade in Vlasov-Maxwell turbulence Yang, Yan; Matthaeus, W.~H.; Parashar, T.~N.; Wu, P.; Wan, M.; Shi, Y.; Chen, S.; Roytershteyn, V.; Daughton, W.; Published by: \pre Published on: 06/2017 YEAR: 2017 DOI: 10.1103/PhysRevE.95.061201 |
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Revisiting a Classic: The Parker-Moffatt Problem Pezzi, O.; Parashar, T.~N.; Servidio, S.; Valentini, F.; asconez, C.~L.; Yang, Y.; Malara, F.; Matthaeus, W.~H.; Veltri, P.; Published by: \apj Published on: 01/2017 YEAR: 2017 DOI: 10.3847/1538-4357/834/2/166 Parker Data Used; magnetohydrodynamics: MHD; plasmas; Solar wind; Physics - Space Physics |
| 2013 |
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Proton Kinetic Effects and Turbulent Energy Cascade Rate in the Solar Wind Osman, K.~T.; Matthaeus, W.~H.; Kiyani, K.~H.; Hnat, B.; Chapman, S.~C.; Published by: \prl Published on: 11/2013 YEAR: 2013 DOI: 10.1103/PhysRevLett.111.201101 Parker Data Used; 96.50.Ci; 52.35.-g; 52.50.-b; 94.05.Lk; Solar wind plasma; sources of solar wind; Waves oscillations and instabilities in plasmas and intense beams; Plasma production and heating; turbulence; Physics - Space Physics; Physics - Plasma Physics |
| 2012 |
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Injection and Acceleration of Charged Nano-Dust Particles from Sungrazing Comets It is proposed that the high-speed nanodust detected by the plasma wave instrument on the STEREO spacecraft could have an origin from the sungrazing comets. Trajectory calculations are performed using a simple analytical coronal magnetic field model to explore the dynamical nature of such charged nanodust in the vicinity of the solar corona. The relevance of this very near-solar source mechanism of nanodust and pickup ions to the Solar Probe Plus mission is also discussed. Published by: Published on: YEAR: 2012 DOI: 10.1063/1.4723586 |
| 2010 |
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Ceramic coatings for the solar probe plus mission A study was conducted to develop the coatings needed to protect the Solar Probe Plus Thermal Protection System (TPS) from the harsh environment. The TPS encountered harsh environment during its mission close to the sun, facing significant solar fluxes. The first part of the study addressed the way a coating s microstructure affected its optical properties and the way coatings were designed to maintain the right microstructure over temperature. The study was led by a researcher from the Advanced Technology Laboratory of the W ... Mehoke, D.; Congdon, E.; , Drewry; Eddins, C.; Deacon, R.; Wolf, T.; Hahn, D.; King, D.; Nagle, D.; Buchta, M.; Zhang, D.; Hemker, K.; Spicer, J.; Jones, J.; Ryan, S.; Schlichter, G.; Published by: Johns Hopkins APL Technical Digest (Applied Physics Laboratory) Published on: Grain growth; Microstructure; Optical properties; Probes; Parker Engineering |
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