Search Publications
Effects of the September 2014 coronal mass ejection chain in the inner Solar System and the response of the Martian ionosphere
Sánchez-Cano, B.; Harada, Y.; Ippolito, A.
Context. During September 2014, intense solar activity led to a number of coronal mass ejections (CMEs) propagating in the heliosphere. The strong perturbation in the interplanetary magnetic field and the remarkable enhancements in the energetic particle fluxes accelerated by the shock waves associated with the CMEs affected the environments of th…
Instantaneous asymmetry of the Martian bow shock: A single- and dual-spacecraft study using MAVEN and Mars Express
Goetz, Charlotte; Gunell, Herbert; Nesbit-Östman, Sara
Aims. We study the instantaneous asymmetry of the Martian bow shock during a change in the direction of the interplanetary magnetic field (IMF) and for steady-state conditions. Specifically, we study the asymmetry with regard to the convective electric field and to the crustal fields of Mars. Methods. Two methods were used: First, a single-spacecr…
Phobos photometric properties from Mars Express HRSC observations
Barucci, M. A.; Fornasier, S.; Matz, K. -D. +5 more
Aims: This study aims to analyze Phobos' photometric properties using Mars Express mission observations to support the Martian Moons exploration mission (MMX) devoted to the investigation of the Martian system and to the return of Phobos samples.
Methods: We analyzed resolved images of Phobos acquired between 2004 and 2022 by the High Re…
Advancements in the 3D shape reconstruction of Phobos: An analysis of shape models and future exploration directions
Willner, Konrad; Chen, Min; Huang, Xianfeng +4 more
Aims: Our research focuses on developing a high-precision and relatively high-resolution shape model of Phobos.
Methods: We employed advanced photogrammetric techniques combined with novel computer vision methods to reconstruct the 3D shape of Phobos from nearly 900 Mars Express/SRC and Viking Orbiter images. This research also involved …
MARSIS data as a new constraint for the orbit of Phobos
Orosei, R.; Lainey, V.; Cicchetti, A. +3 more
Context. The orbit of Phobos is currently known with a 1σ precision of 300 m, mostly directed along its track. Most previous determinations were made with the help of the Super-Resolution Channel (SRC) channel of the HRSC camera on board Mars Express (MEX). The Mars Advanced Radar for Subsurface and Ionosphere Sounding (MARSIS) on board MEX crosse…
The 17 April 2021 widespread solar energetic particle event
Holmström, M.; Grande, M.; Palmerio, E. +46 more
Context. A complex and long-lasting solar eruption on 17 April 2021 produced a widespread solar energetic particle (SEP) event that was observed by five longitudinally well-separated observers in the inner heliosphere that covered distances to the Sun from 0.42 to 1 au: BepiColombo, Parker Solar Probe, Solar Orbiter, STEREO A, and near-Earth space…
Combination of MRO SHARAD and deep-learning-based DTM to search for subsurface features in Oxia Planum, Mars
Tao, Yu; Muller, Jan-Peter; Xiong, Siting +3 more
Context. Oxia Planum is a mid-latitude region on Mars that attracts a great amount of interest worldwide. An orbiting radar provides an effective way to probe the Martian subsurface and detect buried layers or geomorphological features. The Shallow radar orbital radar system on board the NASA Mars reconnaissance orbiter transmits pulsed signals to…
No detection of SO2, H2S, or OCS in the atmosphere of Mars from the first two Martian years of observations from TGO/ACS
Forget, F.; Montmessin, F.; Fedorova, A. A. +13 more
Context. The detection of sulphur species in the Martian atmosphere would be a strong indicator of volcanic outgassing from the surface of Mars.
Aims: We wish to establish the presence of SO2, H2S, or OCS in the Martian atmosphere or determine upper limits on their concentration in the absence of a detection.
Method…
Upstream solar wind speed at comet 67P. Reconstruction method, model comparison, and results
Holmström, M.; Gunell, H.; Futaana, Y. +7 more
Context. Rosetta followed comet 67P at heliocentric distances from 1.25 to 3.6 au. The solar wind was observed for much of this time, but was significantly deflected and to some extent slowed down by the interaction with the coma.
Aims: We use the different changes in the speed of H+ and He2+ when they interact with the …
Mars moon ephemerides after 14 years of Mars Express data
Jaumann, R.; Oberst, J.; Rosenblatt, P. +7 more
The Mars Express (MEX) mission has been successfully operated around Mars since 2004. Among many results, MEX has provided some of the most accurate astrometric data of the two Mars moons, Phobos and Deimos. We present new ephemerides of the Mars moons benefitting from all previously published astrometric data to the most recent MEX SRC data. Obse…