B. Hubert
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View article: Are Cusp‐Aligned Arcs the Equivalent of Auroral Streamers in a Closed Magnetosphere?
Are Cusp‐Aligned Arcs the Equivalent of Auroral Streamers in a Closed Magnetosphere? Open
We present the first observations of a 3‐hour quasi‐periodic intensification of the polar auroras during a prolonged interval of strongly‐northward interplanetary magnetic field (IMF). This takes the form of a localized spot of auroral emi…
View article: Ultraviolet Imager (UVI) for the SMILE Mission
Ultraviolet Imager (UVI) for the SMILE Mission Open
peer reviewed
View article: The dynamics of NBZ auroras
The dynamics of NBZ auroras Open
We present the first observations of a three-hour quasi-periodic intensification of the polar auroras during a prolonged interval of strongly-northward interplanetary magnetic field (IMF).  This takes the form of a localised spot of a…
View article: Ultraviolet NO and Visible O<sub>2</sub> Nightglow in the Mars Southern Winter Polar Region: Statistical Study and Model Comparison
Ultraviolet NO and Visible O<sub>2</sub> Nightglow in the Mars Southern Winter Polar Region: Statistical Study and Model Comparison Open
The Mars NO and the O 2 nightglow are produced by the recombination of atoms produced on the dayside by photodissociation and transported to the nightside. These emissions are tracers of the summer to winter pole dynamics in the upper Mars…
View article: Occurrence and Causes of Large <i>dB</i>/<i>dt</i> Events and AL Bays in the Pre‐Midnight and Dawn Sectors
Occurrence and Causes of Large <i>dB</i>/<i>dt</i> Events and AL Bays in the Pre‐Midnight and Dawn Sectors Open
A necessary condition for the generation of Geomagnetically Induced Currents (GICs) that can pose hazards for technological infrastructure is the occurrence of large, rapid changes in the magnetic field at the surface of the Earth. We inve…
View article: Variations of the Martian oxygen green line dayglow: response to solar activity
Variations of the Martian oxygen green line dayglow: response to solar activity Open
The presence of the Martian oxygen green line emission at 557.7 nm in the Martian dayglow was discovered with the NOMAD-UVIS ultraviolet-visible spectrometer on board ESA’s Trace Gas Orbiter (Gérard et al., 2020). It corresponds…
View article: &#160;North/south asymmetries of the Mars NO ultraviolet and O2 visible nightglow using TGO/NOMAD/UVIS observations
 North/south asymmetries of the Mars NO ultraviolet and O2 visible nightglow using TGO/NOMAD/UVIS observations Open
The discovery of the first visible nightglow is a promising tool to deepen our knowledge of the dynamics of the Martian upper atmosphere (Figure 1). Gérard et al. (2023) discovered the O2 Herzberg II system between 400 and 650 nm in t…
View article: Occurrence and causes of large dB/dt events in the pre-midnight and dawn sectors
Occurrence and causes of large dB/dt events in the pre-midnight and dawn sectors Open
We investigate the causes of large $dB/dt$ events observed by SuperMAG, by comparing with the time-series of different types of geomagnetic activity, or “convection state”, for the duration of 2010. Spikes are found to occur predominantly …
View article: Quantifying the Electron Energy of Mars Aurorae Through the Oxygen Emission Brightness Ratio at 130.4 and 135.6 nm
Quantifying the Electron Energy of Mars Aurorae Through the Oxygen Emission Brightness Ratio at 130.4 and 135.6 nm Open
Mars discrete aurorae are caused by accelerated electrons precipitating into the atmosphere and interacting with species such as atomic oxygen. However, the energy of the electrons causing these aurorae remains currently unclear: no simult…
View article: The Ionospheric Connection Explorer - Prime Mission Review
The Ionospheric Connection Explorer - Prime Mission Review Open
The two-year prime mission of the NASA Ionospheric Connection Explorer (ICON) is complete. The baseline operational and scientific objectives have been met and exceeded, as detailed in this report. In October of 2019, ICON was launched int…
View article: The Ultraviolet Martian Dayglow Observed With NOMAD/UVIS on ExoMars Trace Gas Orbiter
The Ultraviolet Martian Dayglow Observed With NOMAD/UVIS on ExoMars Trace Gas Orbiter Open
The Trace Gas Orbiter has been orbiting Mars since 2016 with the Nadir and Occultation for MArs Discovery (NOMAD) UltraViolet and Visible Spectrometer (UVIS) instrument on board. Focusing on limb observations recorded in the ultraviolet (U…
View article: Production and radiative transfert of the OI 130.4 and 135.6 nm emissions in the Mars aurora
Production and radiative transfert of the OI 130.4 and 135.6 nm emissions in the Mars aurora Open
The presence of a weak oxygen emission at 130.4-nm resulting from the O 3P-3S transition was first detected in limb observations of the Martian aurora with SPICAM/Mars Express (Soret et al., 2016). It is mostly excited by direct impact of …
View article: The Kinetic Monte Carlo Model of the Auroral Electron Precipitation into N2-O2 Planetary Atmospheres
The Kinetic Monte Carlo Model of the Auroral Electron Precipitation into N2-O2 Planetary Atmospheres Open
Auroral events are the prominent manifestation of solar/stellar forcing on planetary atmospheres. They are closely related to the energy deposition by and evolution of planetary atmospheres, and their observations are widely used to analyz…
View article: Density and Temperature of the Upper Mesosphere and Lower Thermosphere of Mars Retrieved From the OI 557.7 nm Dayglow Measured by TGO/NOMAD
Density and Temperature of the Upper Mesosphere and Lower Thermosphere of Mars Retrieved From the OI 557.7 nm Dayglow Measured by TGO/NOMAD Open
The upper mesosphere and lower thermosphere of Mars (70–150 km) is of high interest because it is a region affected by climatological/meteorological events in the lower atmosphere and external solar forcing. However, only a few measurement…
View article: The Mars Oxygen Visible Dayglow: A Martian Year of NOMAD/UVIS Observations
The Mars Oxygen Visible Dayglow: A Martian Year of NOMAD/UVIS Observations Open
The Ultraviolet and Visible Spectrometer Ultraviolet (UVIS UV) and Visible Spectrometer channel of the Nadir and Occultation for MArs Discovery spectrometer aboard the ExoMars Trace Gas Orbiter has made limb observations of the Martian day…
View article: First ICON‐FUV Nighttime NmF2 and hmF2 Comparison to Ground and Space‐Based Measurements
First ICON‐FUV Nighttime NmF2 and hmF2 Comparison to Ground and Space‐Based Measurements Open
The Far Ultra Violet (FUV) ultraviolet imager onboard the NASA‐ICON mission is dedicated to the observation and study of the ionosphere dynamics at mid and low latitudes. We compare density profiles provided by the ICON FUV instrument duri…
View article: Discrete Aurora on Mars: Spectral Properties, Vertical Profiles, and Electron Energies
Discrete Aurora on Mars: Spectral Properties, Vertical Profiles, and Electron Energies Open
We present an analysis of hundreds of middle ultraviolet auroral spectra collected at the limb with the Imaging UltraViolet Spectrograph (IUVS) instrument on board the Mars Atmosphere and Volatile EvolutioN (MAVEN) spacecraft. While the co…
View article: First Observation of the Oxygen 630 nm Emission in the Martian Dayglow
First Observation of the Oxygen 630 nm Emission in the Martian Dayglow Open
Following the recent detection of the oxygen green line airglow on Mars, we have improved the statistical analysis of the data recorded by the NOMAD/UVIS instrument on board the ExoMars Trace Gas Orbiter mission by summing up hundreds of s…
View article: Abel transform of exponential functions for planetary and cometary atmospheres with application to observation of 46P/Wirtanen and to the OI 557.7 nm emission at Mars.
Abel transform of exponential functions for planetary and cometary atmospheres with application to observation of 46P/Wirtanen and to the OI 557.7 nm emission at Mars. Open
<p>Line-of-sight integration of emissions from planetary and cometary atmospheres is the Abel transform of the emission rate, under the spherical symmetry assumption. Indefinite integrals constructed from the Abel transform integral …
View article: Dual-lobe reconnection and horse-collar auroras
Dual-lobe reconnection and horse-collar auroras Open
<p>We propose a mechanism for the formation of the horse-collar auroral configuration common during periods of strongly northwards interplanetary magnetic field, invoking the action of dual-lobe reconnection (DLR). &#160;Auroral …
View article: Comparison of ICON O+ density profiles with electron density profiles provided by COSMIC-2 and ground-based ionosondes
Comparison of ICON O+ density profiles with electron density profiles provided by COSMIC-2 and ground-based ionosondes Open
peer reviewed
View article: Martian visible and ultraviolet dayglow: altitude, latitudinal and seasonal variations observed with NOMAD/TGO
Martian visible and ultraviolet dayglow: altitude, latitudinal and seasonal variations observed with NOMAD/TGO Open
The OI 557.7 nm green line has been measured in the Martian dayglow for the first time with the UVIS visible-ultraviolet spectrograph on board ESA’s Trace Gas Orbiter (Gérard et al., 2020). The first observations started in Apri…
View article: Dual‐Lobe Reconnection and Horse‐Collar Auroras
Dual‐Lobe Reconnection and Horse‐Collar Auroras Open
We propose a mechanism for the formation of the horse‐collar auroral configuration during periods of strongly northward interplanetary magnetic field (IMF), invoking the action of dual‐lobe reconnection (DLR). Auroral observations are prov…
View article: Dual-lobe reconnection and horse-collar auroras
Dual-lobe reconnection and horse-collar auroras Open
Earth and Space Science Open Archive This work has been accepted for publication in Journal of Geophysical Research - Space Physics. Version of RecordESSOAr is a venue for early communication or feedback before peer review. Data may be pre…