345 citations · 1.6k across the 37 of their papers we have counts for
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Near-Sun Switchbacks Show Statistical Signatures of Solar Activity
Sneha Pandit, Thierry Dudok de Wit, Clara Froment +3
The large amplitude, Alfvénic deflections in the solar wind, called magnetic switchbacks, are a ubiquitous feature of the inner heliosphere, yet their origin and variability remain…
Reconstruction of Polarization Properties of Whistler Waves From Two Magnetic and Two Electric Field Components: Application to Parker Solar Probe Measurements
L. Colomban, O. V. Agapitov, V. Krasnoselskikh +8
The search-coil magnetometer (SCM) aboard Parker Solar Probe (PSP) measures the 3 Hz to 1 MHz magnetic field fluctuations. During Encounter 1, the SCM operated as expected; however…
Whistler waves generated inside magnetic dips in the young solar wind: observations of the Search-Coil Magnetometer on board Parker Solar Probe
C. Froment, O. V. Agapitov, V. Krasnoselskikh +11
Context. Whistler waves are electromagnetic waves produced by electron-driven instabilities, that in turn can reshape the electron distributions via wave-particle interactions. In…
Re-calibration of the Sunspot Number: Status Report
F. Clette, L. Lefèvre, T. Chatzistergos +18
We report progress on the ongoing recalibration of the Wolf sunspot number (SN) and Group sunspot number (GN) following the release of version 2.0 of SN in 2015. This report consti…
Variability of the Sun's luminosity places constraints on the thermal equilibrium of the convection zone
L. E. A. Vieira, G. Kopp, T. Dudok de Wit +5
Luminosity, which is the total amount of radiant energy emitted by an object, is one of the most critical quantities in astrophysics for characterizing stars. Equally important is…
Parker Solar Probe evidence for the absence of whistlers close to the Sun to scatter strahl and regulate heat flux
C. Cattell, A. Breneman, J. Dombeck +14
Using the Parker Solar Probe FIELDS bandpass filter data and SWEAP electron data from Encounters 1 through 9, we show statistical properties of narrowband whistlers from ~16 Rs to…
Strong perpendicular velocity-space in proton beams observed by Parker Solar Probe
J. L. Verniero, B. D. G. Chandran, D. E. Larson +16
The SWEAP instrument suite on Parker Solar Probe (PSP) has detected numerous proton beams associated with coherent, circularly polarized, ion-scale waves observed by PSP's FIELDS i…
Direct evidence for magnetic reconnection at the boundaries of magnetic switchbacks with Parker Solar Probe
C. Froment, V. Krasnoselskikh, T. Dudok de Wit +20
Parker Solar Probe's first encounters with the Sun revealed the presence of ubiquitous localised magnetic deflections in the inner heliosphere; these structures, often called switc…
Sunward propagating whistler waves collocated with localized magnetic field holes in the solar wind: Parker Solar Probe observations at 35.7 Sun radii
O. V. Agapitov, T. Dudok de Wit, F. S. Mozer +21
Observations by the Parker Solar Probe mission of the solar wind at about 35.7 solar radii reveal the existence of whistler wave packets with frequencies below 0.1 f/fce (20-80 Hz…
The role of Alfvén wave dynamics on the large scale properties of the solar wind: comparing an MHD simulation with PSP E1 data
Victor Réville, Marco Velli, Olga Panasenco +18
During Parker Solar Probe's first orbit, the solar wind plasma has been observed in situ closer than ever before, the perihelion on November 6th 2018 revealing a flow that is const…
Statistical Evidence for Contributions of Flares and Coronal Mass Ejections to Major Solar Energetic Particle Events
G. Trottet, S. Samwel, K. -L. Klein +2
Solar energetic particle (SEP) events are related to flares and coronal mass ejections (CMEs). This work is a new investigation of statistical relationships between SEP peak intens…
Synoptic solar radio observations as proxies for upper atmosphere modelling
Thierry Dudok de Wit, Sean Bruinsma, Kiyoto Shibasaki
The specification of the upper atmosphere strongly relies on solar proxies that can properly reproduce the solar energetic input in the UV. Whilst the microwave flux at 10.7 cm (al…
Recent variability of the solar spectral irradiance and its impact on climate modelling
I. Ermolli, K. Matthes, T. Dudok de Wit +12
The lack of long and reliable time series of solar spectral irradiance (SSI) measurements makes an accurate quantification of solar contributions to recent climate change difficult…
Coronal Temperature Maps from Solar EUV images: a Blind Source Separation Approach
T. Dudok de Wit, S. Moussaoui, C. Guennou +5
Multi-wavelength solar images in the EUV are routinely used for analysing solar features such as coronal holes, filaments, and flares. However, images taken in different bands ofte…
Short-term forecast of the total and spectral solar irradiance
Luis Eduardo A. Vieira, Thierry Dudok de Wit, Matthieu Kretzschmar
Among several heliophysical and geophysical quantities, the accurate evolution of the solar irradiance is fundamental to forecast the evolution of the neutral and ionized component…
Determination of the most pertinent EUV proxy for use in thermosphere modeling
T. Dudok de Wit, S. Bruinsma
Two major issues in the specification of the thermospheric density are the definition of proper solar inputs and the empirical modeling of thermosphere response to solar and to geo…
A multispectral and multiscale view of the Sun
T. Dudok de Wit
The emergence of a new discipline called space weather, which aims at understanding and predicting the impact of solar activity on the terrestrial environment and on technological…
The Influence of Solar Flares on the Lower Solar Atmosphere: Evidence from the Na D Absorption Line Measured by GOLF/SOHO
G. Cessateur, M. Kretzschmar, T. Dudok de Wit +1
Solar flares presumably have an impact on the deepest layers of the solar atmosphere and yet the observational evidence for such an impact is scarce. Using ten years of measurement…
The effect of flares on total solar irradiance
Matthieu Kretzschmar, Thierry Dudok de Wit, Werner Schmutz +3
Flares are powerful energy releases occurring in stellar atmospheres. Solar flares, the most intense energy bursts in the solar system, are however hardly noticeable in the total s…