N. Meyer‐Vernet
YOU?
Author Swipe
View article: Quasi‐Thermal Noise Spectroscopy in Magnetized Space Plasma: Theory and Model
Quasi‐Thermal Noise Spectroscopy in Magnetized Space Plasma: Theory and Model Open
The quasi‐thermal noise measured by an electric antenna is routinely used to characterize space plasmas, mainly measuring the electrons' properties. To employ this diagnostic technique, instrumental models are required to turn the instrume…
View article: Will Nanodust Reappear in STEREO/WAVES Data?
Will Nanodust Reappear in STEREO/WAVES Data? Open
Nanodust particles produced near the Sun by collisional breakup of larger grains are accelerated in the magnetised solar wind and reach high speeds outwards of 1 au. Vaporisation and ionization of fast dust grains impacting a spacecraft pr…
View article: Will nanodust reappear in STEREO/WAVES data?
Will nanodust reappear in STEREO/WAVES data? Open
Nanodust particles produced near the Sun by collisional breakup of larger grains are accelerated in the magnetised solar wind and reach high speeds outwards of 1 AU. Vaporisation and ionisation of fast dust grains impacting a spacecraft pr…
View article: Impact ionization double peaks analyzed in high temporal resolution on Solar Orbiter
Impact ionization double peaks analyzed in high temporal resolution on Solar Orbiter Open
Solar Orbiter is equipped with electrical antennas performing fast measurements of the surrounding electric field. The antennas register high-velocity dust impacts through the electrical signatures of impact ionization. Although the basic …
View article: On the Plasma Quasi-thermal Noise in the Outer Heliosphere
On the Plasma Quasi-thermal Noise in the Outer Heliosphere Open
The recent paper by Li et al. on electron quasi-thermal noise (QTN) in the outer heliosphere is flawed. It assumes the plasma drift speed to be much smaller than the electron thermal speed, even though both quantities are of the same order…
View article: Comment on egusphere-2023-2067
Comment on egusphere-2023-2067 Open
Abstract. Solar Orbiter is equipped with electrical antennas performing fast measurements of the surrounding electric field. The antennas register high velocity dust impacts through the electrical signatures of impact ionization. Although …
View article: Plasma line detected by Voyager 1 in the interstellar medium: Tips and traps for quasi-thermal noise spectroscopy
Plasma line detected by Voyager 1 in the interstellar medium: Tips and traps for quasi-thermal noise spectroscopy Open
The quasi-thermal motion of plasma particles produces electrostatic fluctuations, whose voltage power spectrum induced on electric antennas reveals plasma properties. In weakly magnetised plasmas, the main feature of the spectrum is a line…
View article: Plasma line detected by Voyager 1 in the interstellar medium: Tips and traps for quasi-thermal noise spectroscopy
Plasma line detected by Voyager 1 in the interstellar medium: Tips and traps for quasi-thermal noise spectroscopy Open
The quasi-thermal motion of plasma particles produces electrostatic fluctuations, whose voltage power spectrum induced on electric antennas reveals plasma properties. In weakly magnetised plasmas, the main feature of the spectrum is a line…
View article: Impact Ionization Double Peaks Analyzed in High Temporal Resolution on Solar Orbiter
Impact Ionization Double Peaks Analyzed in High Temporal Resolution on Solar Orbiter Open
Solar Orbiter is equipped with electrical antennas performing fast measurements of the surrounding electric field. The antennas register high velocity dust impacts through the electrical signatures of impact ionization. Although the basic …
View article: In Situ Cosmic Dust Detection for Heliophysics
In Situ Cosmic Dust Detection for Heliophysics Open
International audience
View article: Total electron temperature derived from quasi-thermal noise spectroscopy in the pristine solar wind from Parker Solar Probe observations
Total electron temperature derived from quasi-thermal noise spectroscopy in the pristine solar wind from Parker Solar Probe observations Open
Aims. We applied the quasi-thermal noise (QTN) method to Parker Solar Probe (PSP) observations to derive the total electron temperature ( T e ). We combined a set of encounters to make up a 12-day period of observations around each perihel…
View article: Total Electron Temperature Derived from Quasi-Thermal Noise Spectroscopy In the Pristine Solar Wind: Parker Solar Probe Observations
Total Electron Temperature Derived from Quasi-Thermal Noise Spectroscopy In the Pristine Solar Wind: Parker Solar Probe Observations Open
The Quasi-thermal noise (QTN) technique is a reliable tool to yield accurate measurements of the electron parameters in the solar wind. We apply this method on Parker Solar Probe (PSP) observations to derive the total electron temperature …
View article: An analytical model for dust impact voltage signals, and its application to STEREO/WAVES data
An analytical model for dust impact voltage signals, and its application to STEREO/WAVES data Open
<p>Dust grains are a common constituent of the Solar system. Dust impacts have been observed using radio and wave instruments onboard spacecraft since the 1980s. Voltage waveforms show typical impulsive signals generated by dust grai…
View article: Weak line discovered by Voyager 1 in the interstellar medium: Quasi-thermal noise produced by very few fast electrons
Weak line discovered by Voyager 1 in the interstellar medium: Quasi-thermal noise produced by very few fast electrons Open
A weak continuous line has been recently discovered onboard Voyager 1 in the interstellar medium, whose origin raised two major questions. First, how can this line be produced by plasma quasi-thermal noise on the Voyager short antenna? Sec…
View article: An analytical model for dust impact voltage signals and its application to STEREO/WAVES data
An analytical model for dust impact voltage signals and its application to STEREO/WAVES data Open
Context. Dust impacts have been observed using radio and wave instruments onboard spacecraft since the 1980s. Voltage waveforms show typical impulsive signals generated by dust grains. Aims. We aim at developing models of how signals are g…
View article: First dust measurements with the Solar Orbiter Radio and Plasma Wave instrument
First dust measurements with the Solar Orbiter Radio and Plasma Wave instrument Open
Context. Impacts of dust grains on spacecraft are known to produce typical impulsive signals in the voltage waveform recorded at the terminals of electric antennas. Such signals (as may be expected) are routinely detected by the Time Domai…
View article: Interplanetary dust observations with the Solar Orbiter RPW instrument: a first year of data.
Interplanetary dust observations with the Solar Orbiter RPW instrument: a first year of data. Open
<p>Impacts of dust grains on spacecraft are known to produce typical impulsive signals in the voltage waveform recorded at the terminals of electric antennas. Such signals are, as could be expected, routinely detected by the radio an…
View article: Solar wind energy flux observations in the inner heliosphere: first results from Parker Solar Probe
Solar wind energy flux observations in the inner heliosphere: first results from Parker Solar Probe Open
Aims. We investigate the solar wind energy flux in the inner heliosphere using 12-day observations around each perihelion of Encounter One (E01), Two (E02), Four (E04), and Five (E05) of Parker Solar Probe (PSP), respectively, with a minim…
View article: Solar wind energy flux observations in the inner heliosphere: First results from Parker Solar Probe
Solar wind energy flux observations in the inner heliosphere: First results from Parker Solar Probe Open
We investigate the solar wind energy flux in the inner heliosphere using 12-day observations around each perihelion of Encounter One (E01), Two (E02), Four (E04), and Five (E05) of Parker Solar Probe (PSP), respectively, with a minimum hel…
View article: How fast do mobile organisms respond to stimuli? Response times from bacteria to elephants and whales
How fast do mobile organisms respond to stimuli? Response times from bacteria to elephants and whales Open
Quick responses to fast changes in the environment are crucial in animal behaviour and survival, for example to seize prey, escape predators, or negotiate obstacles. Here, we study the ‘simple response time’ that is the time elapsed betwee…
View article: Freedom, research and serendipity: The joy of discovery
Freedom, research and serendipity: The joy of discovery Open
International audience
View article: Large-scale electron solar wind parameters of the inner heliosphere with Parker Solar Probe/FIELDS
Large-scale electron solar wind parameters of the inner heliosphere with Parker Solar Probe/FIELDS Open
<p>We present in situ properties of electron density and temperature in the inner heliosphere obtained during the three first solar encounters at 35 solar radii of the Parker Solar Probe mission. These preliminary results, recently s…
View article: Plasma Waves in Space: The Importance of Properly Accounting for the Measuring Device
Plasma Waves in Space: The Importance of Properly Accounting for the Measuring Device Open
Electric fields are generally measured or calculated using two intuitive assumptions: (1) the electric field equals the voltage divided by the antenna length when the antenna is electromagnetically short (2) the antenna responds best to el…
View article: Anticorrelation between the Bulk Speed and the Electron Temperature in the Pristine Solar Wind: First Results from the Parker Solar Probe and Comparison with Helios
Anticorrelation between the Bulk Speed and the Electron Temperature in the Pristine Solar Wind: First Results from the Parker Solar Probe and Comparison with Helios Open
We discuss the solar wind electron temperatures T e as measured in the nascent solar wind by Parker Solar Probe during its first perihelion pass. The measurements have been obtained by fitting the high-frequency part of quasi-thermal noise…
View article: Dust observations with antenna measurements and its prospects for observations with Parker Solar Probe and Solar Orbiter
Dust observations with antenna measurements and its prospects for observations with Parker Solar Probe and Solar Orbiter Open
The electric and magnetic field instrument suite FIELDS on board the NASA Parker Solar Probe and the radio and plasma waves instrument RPW on the ESA Solar Orbiter mission that explore the inner heliosphere are sensitive to signals generat…
View article: Dust observations with antenna measurements and its prospects for observations with Parker Solar Probe and Solar Orbiter
Dust observations with antenna measurements and its prospects for observations with Parker Solar Probe and Solar Orbiter Open
The electric and magnetic field instrument suite FIELDS on board the NASA Parker Solar Probe and the radio and plasma waves instrument RPWS on the ESA Solar Orbiter mission that explore the inner heliosphere are sensitive to signals genera…
View article: Quasi‐thermal noise spectroscopy: The art and the practice
Quasi‐thermal noise spectroscopy: The art and the practice Open
Quasi‐thermal noise spectroscopy is an efficient tool for measuring in situ macroscopic plasma properties in space, using a passive wave receiver at the ports of an electric antenna. This technique was pioneered on spinning spacecraft carr…
View article: Frequency range of dust detection in space with radio and plasma wave receivers: Theory and application to interplanetary nanodust impacts on Cassini
Frequency range of dust detection in space with radio and plasma wave receivers: Theory and application to interplanetary nanodust impacts on Cassini Open
Wave instruments can detect dust in space via the charges released by impact ionization of fast dust grains. Each hypervelocity dust impact produces an electrostatic pulse whose short risetime is a major property determining the frequency …
View article: Maximum relative speeds of living organisms: Why do bacteria perform as fast as ostriches?
Maximum relative speeds of living organisms: Why do bacteria perform as fast as ostriches? Open
Self-locomotion is central to animal behaviour and survival. It is generally analysed by focusing on preferred speeds and gaits under particular biological and physical constraints. In the present paper we focus instead on the maximum spee…