169 citations · 2.2k across the 51 of their papers we have counts for
31 papers · 1 filter
Embedded coherent structures from MHD to sub-ion scales in turbulent solar wind at 0.17 au
Alexander Vinogradov, Olga Alexandrova, Pascal Démoulin +6
We study intermittent coherent structures in solar wind magnetic turbulence from MHD to kinetic plasma scales using Parker Solar Probe data during its first perihelion (at 0.17 au)…
Source positions of an interplanetary type III radio burst and anisotropic radio-wave scattering
Xingyao Chen, Eduard P. Kontar, Nicolina Chrysaphi +7
Interplanetary solar radio type III bursts provide the means for remotely studying and tracking energetic electrons propagating in the interplanetary medium. Due to the lack of dir…
The Radial Evolution of the Solar Wind as Organized by Electron Distribution Parameters
J. S. Halekas, P. Whittlesey, D. E. Larson +9
We utilize observations from the Parker Solar Probe (PSP) to study the radial evolution of the solar wind in the inner heliosphere. We analyze electron velocity distribution functi…
Statistical Analysis of the Radial Evolution of the Solar Winds between 0.1 and 1 au, and their Semi-empirical Iso-poly Fluid Modeling
Dakeyo, Maksimovic, Démoulin +2
Statistical classification of the Helios solar wind observations into several populations sorted by bulk speed has revealed an outward acceleration of the wind. The faster the wind…
Magnetic field intermittency in the solar wind: PSP and SolO observations ranging from the Alfven region out to 1 AU
Nikos Sioulas, Zesen Huang, Marco Velli +17
and data are utilized to investigate magnetic field intermittency in the solar wind (SW). Small-scale intermittency is observed to radially strengthen…
CMEs and SEPs During November-December 2020: A Challenge for Real-Time Space Weather Forecasting
Erika Palmerio, Christina O. Lee, M. Leila Mays +20
Predictions of coronal mass ejections (CMEs) and solar energetic particles (SEPs) are a central issue in space weather forecasting. In recent years, interest in space weather predi…
Spectral Analysis of Solar Radio Type III Bursts from 20 kHz to 410 MHz
K. Sasikumar Raja, Milan Maksimovic, Eduard P. Kontar +10
We present the statistical analysis of the spectral response of solar radio type III bursts over the wide frequency range between 20 kHz and 410 MHz. For this purpose, we have used…
Whistler waves observed by Solar Orbiter / RPW between 0.5 AU and 1 AU
M. Kretzschmar, T. Chust, V. Krasnoselskikh +29
The goal of our study is to detect and characterize the electromagnetic waves that can modify the electron distribution functions, with a special attention to whistler waves. We an…
Simulations of radio-wave anisotropic scattering to interpret type III radio bursts measurements by Solar Orbiter, Parker Solar Probe, STEREO and Wind
S. Musset, M. Maksimovic, E. Kontar +9
We use multi-spacecraft observations of invididual type III radio bursts in order to calculate the directivity of the radio emission, to be compared to the results of ray-tracing s…
Magnetic reconnection as a mechanism to produce multiple protonpopulations and beams locally in the solar wind
B. Lavraud, R. Kieokaew, N. Fargette +37
Context. Spacecraft observations early revealed frequent multiple proton populations in the solar wind. Decades of research on their origin have focused on processes such as magnet…
The Long Period of 3He-rich Solar Energetic Particles Measured by Solar Orbiter on 2020 November 17-23
R. Bucik, G. M. Mason, R. Gomez-Herrero +31
We report observations of a relatively long period of 3He-rich solar energetic particles (SEPs) measured by Solar Orbiter. The period consists of several well-resolved ion injectio…
Ambipolar electric field and potential in the solar wind estimated from electron velocity distribution functions
Laura Bercic, Milan Maksimovic, Jasper S. Halekas +17
The solar wind escapes from the solar corona and is accelerated, over a short distance, to its terminal velocity. The energy balance associated with this acceleration remains poorl…
Signatures of coronal hole substructure in the solar wind: combined Solar Orbiter remote sensing and in situ measurements
T. S. Horbury, R. Laker, L. Rodriguez +21
Context. The Sun's complex corona is the source of the solar wind and interplanetary magnetic field. While the large scale morphology is well understood, the impact of variations i…
A journey of exploration to the polar regions of a star: probing the solar poles and the heliosphere from high helio-latitude
Louise Harra, Vincenzo Andretta, Thierry Appourchaux +29
A mission to view the solar poles from high helio-latitudes (above 60) will build on the experience of Solar Orbiter as well as a long heritage of successful solar missions…
Turbulent Proton Heating Rate in the Solar Wind from to
K. Sasikumar Raja, Prasad Subramanian, Madhusudan Ingale +2
Various remote sensing observations have been used so far to probe the turbulent properties of the solar wind. Using the recently reported density modulation indices that are deriv…
Electron heat flux in the near-Sun environment
J. S. Halekas, P. L. Whittlesey, D. E. Larson +15
We survey the electron heat flux observed by the Parker Solar Probe (PSP) in the near-Sun environment at heliocentric distances of 0.125-0.25 AU. We utilized measurements from the…
The Solar Orbiter Science Activity Plan: translating solar and heliospheric physics questions into action
I. Zouganelis, A. De Groof, A. P. Walsh +182
Solar Orbiter is the first space mission observing the solar plasma both in situ and remotely, from a close distance, in and out of the ecliptic. The ultimate goal is to understand…
Coronal Electron Temperature inferred from the Strahl Electrons in the Inner Heliosphere: Parker Solar Probe and Helios observations
Laura Bercic, Davin Larson, Phyllis Whittlesey +17
The shape of the electron velocity distribution function plays an important role in the dynamics of the solar wind acceleration. Electrons are normally modelled with three componen…
Density Fluctuations in the Solar Wind Based on Type III Radio Bursts Observed by Parker Solar Probe
Vratislav Krupar, Adam Szabo, Milan Maksimovic +20
Radio waves are strongly scattered in the solar wind, so that their apparent sources seem to be considerably larger and shifted than the actual ones. Since the scattering depends o…
Statistics and Polarization of Type III Radio Bursts Observed in the Inner Heliosphere
Marc Pulupa, Stuart D. Bale, Samuel T. Badman +20
We present initial results from the Radio Frequency Spectrometer (RFS), the high frequency component of the FIELDS experiment on the Parker Solar Probe (PSP). During the first PSP…
First in-situ Measurements of Electron Density and Temperature from Quasi-Thermal Noise Spectroscopy with Parker Solar Probe/FIELDS
Michel Moncuquet, Nicole Meyer-Vernet, Karine Issautier +10
Heat transport in the solar corona and wind is still a major unsolved astrophysical problem. Because of the key role played by electrons, the electron density and temperature(s) ar…
Electrons in the Young Solar Wind: First Results from the Parker Solar Probe
J. S. Halekas, P. Whittlesey, D. E. Larson +14
The Solar Wind Electrons Alphas and Protons experiment on the Parker Solar Probe (PSP) mission measures the three-dimensional electron velocity distribution function. We derive the…
Anisotropic Radio-Wave Scattering and the Interpretation of Solar Radio Emission Observations
Eduard P. Kontar, Xingyao Chen, Nicolina Chrysaphi +6
The observed properties (i.e., source size, source position, time duration, decay time) of solar radio emission produced through plasma processes near the local plasma frequency, a…
Global Solar Magnetic-field and Interplanetary Scintillations During the Past Four Solar Cycles
K. Sasikumar Raja, P. Janardhan, Susanta Kumar Bisoi +4
The extended minimum of Solar Cycle 23, the extremely quiet solar-wind conditions prevailing, and the mini-maximum of Solar Cycle 24 drew global attention and many authors have sin…