Article
Geosciences, Multidisciplinary
Kai Fan, Limei Yan, Yong Wei, Aibing Zhang, Linggao Kong, Markus Franz, Fei He, Lihui Chai, Chongjing Yuan, Yuqi Wang, Jun Zhong, Zhaojin Rong, Zhonghua Yao, Yongxin Pan, Jun Cui, Jiansen He, Wenya Li, Binbin Tang, Chi Wang
Summary: During China's first planetary exploration mission to Mars, the Tianwen-1 probe successfully observed solar wind flows between the Earth and Mars, providing valuable data for understanding the cataclysmic climate change in Martian history. The ion analyzer onboard the Tianwen-1 orbiter demonstrated reliable and stable performance.
SCIENCE CHINA-EARTH SCIENCES
(2022)
Article
Geosciences, Multidisciplinary
Chi Zhang, Yoshifumi Futaana, Hans Nilsson, Zhaojin Rong, Moa Persson, Lucy Klinger, Xiaodong Wang, Gabriella Stenberg Wieser, Stas Barabash, Chuanfei Dong, Mats Holmstrom, Yasir Soobiah, Yong Wei
Summary: We investigated the properties of Mars-ward planetary ions in the Martian magnetotail and found that crustal fields may play a key role in producing Mars-ward flows. The occurrence rate and flux of Mars-ward flows are higher during solar maximum, but relatively low compared to Venus, where planetward flows significantly decrease the total escape rates of ions.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Astronomy & Astrophysics
C. Signoles, M. Persson, Y. Futaana, S. Aizawa, N. Andre, S. Bergman, A. Fedorov, V. Lindwall, N. Martinez, C. Mazelle, S. Rojas Mata, A. Wolff, T. L. Zhang
Summary: Investigations of the boundaries and their variability of the induced magnetosphere on Venus can help us understand the solar wind's effect on Venus and unmagnetized planets. Using data from Venus Express, this study finds that the location of the bow shock is mainly influenced by the solar cycle and dynamic pressure, while the ion composition boundary shows clear changes during solar maximum but no clear trends during solar minimum.
ASTROPHYSICAL JOURNAL
(2023)
Article
Astronomy & Astrophysics
Yutian Cao, Dandan Niu, Wenjun Liang, Jun Cui, Xiaoshu Wu, Xin Wan, Jiahao Zhong, Lei Li, Zhaojin Rong, Yong Wei
Summary: Thermal electron depression and energetic electron depletion are observed in the nightside Martian ionosphere. While energetic electron depletion has been extensively studied, there is limited research on thermal electron depression and the correlation between the two is unknown. Through Mars Express total electron content (TEC) measurements, a large number of TEC depression features are identified, with large amplitude depression being more frequently observed near strong magnetic fields and small amplitude depression uniformly distributed across the Martian surface.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
Yann Leseigneur, Mathieu Vincendon
Summary: While dust is an important parameter of Mars climate, its behavior can be erratic and is notably related to Global Dust Storms. Long-term monitoring of dust dynamics is required to better understand surface-atmosphere dust exchanges on Mars. A new method based on OMEGA NIR dataset is presented to detect atmospheric dust as a function of space and time.
Article
Astronomy & Astrophysics
P. Garnier, C. Jacquey, X. Gendre, V. Genot, C. Mazelle, X. Fang, J. R. Gruesbeck, B. Sanchez-Cano, J. S. Halekas
Summary: The interaction between Mars and the solar wind leads to the formation of a bow shock in front of the planet. This study compares the influence of different factors on the shock location, such as extreme ultraviolet fluxes, magnetosonic Mach number, crustal magnetic fields, solar wind dynamic pressure, and Interplanetary Magnetic Field (IMF) parameters. The results show that extreme ultraviolet fluxes and magnetosonic Mach number are the major drivers of the shock location, while crustal fields and solar wind dynamic pressure are secondary drivers.
JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
(2022)
Article
Geosciences, Multidisciplinary
H. Madanian, N. Omidi, D. G. Sibeck, L. Andersson, R. Ramstad, S. Xu, J. R. Gruesbeck, S. J. Schwartz, R. A. Frahm, D. A. Brain, P. Kajdic, F. G. Eparvier, D. L. Mitchell, S. M. Curry
Summary: This study investigates the non-planarity of Mars' bow shock and its impact on transient structures near the upstream edge of moving foreshocks caused by slow rotations in the IMF. The structures exhibit a decrease in plasma density and IMF strength within their core, accompanied by a compressional shock layer, consistent with foreshock bubbles. The ion populations responsible for these structures include backstreaming ions and reflected ions with hybrid trajectories.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Geochemistry & Geophysics
F. Gonzalez-Galindo, D. Eusebio, F. Nemec, K. Peter, A. Kopf, S. Tellmann, M. Paetzold
Summary: The study focuses on the seasonal and geographical variability of the peak electron density and altitude at the main ionospheric peak on Mars. Data from the Mars Express mission were used to analyze the trends, which showed sinusoidal seasonal variations and elevated electron densities in regions with strong crustal fields, as well as latitudinal asymmetries in both density and altitude. Additionally, during a global dust storm in Mars Year 28, the altitude of the ionospheric peak was raised by about 10-15 km compared to other years.
JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS
(2021)
Article
Astronomy & Astrophysics
Anthony P. Rasca, William M. Farrell, Robert J. MacDowall, Stuart D. Bale, Justin C. Kasper
Summary: The Parker Solar Probe's first solar encounters revealed a significant amount of brief magnetic field reversals known as "switchbacks". These switchbacks evolve with radial distance from the Sun and may exhibit common changes in characteristics near closest approach.
ASTROPHYSICAL JOURNAL
(2021)
Article
Geochemistry & Geophysics
Joseph Hughes, Federico Gasperini, Jeffrey M. Forbes
Summary: This study investigates the effects of solar rotation on the Martian thermosphere by analyzing MAVEN observations. The results show that the density of the Martian thermosphere exhibits significant response to the quasi-27-day solar rotation variability.
JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS
(2022)
Article
Astronomy & Astrophysics
Andre Szantai, Joachim Audouard, Francois Forget, Kevin S. Olsen, Brigitte Gondet, Ehouarn Millour, Jean-Baptiste Madeleine, Alizee Pottier, Yves Langevin, Jean-Pierre Bibring
Summary: A Martian water-ice cloud climatology has been extracted from OMEGA data, revealing cloud thickness and nebulosity over different regions using the Reversed Ice Cloud Index and the Percentage of Cloudy Pixels. Various dense cloud coverage areas were observed in different regions and at different times, showcasing the variability in cloud distribution and behavior.
Article
Astronomy & Astrophysics
Guokan Li, Haoyu Lu, Yun Li, Yihui Song, Jinbin Cao, Shibang Li
Summary: This study used a three-dimensional multispecies magnetohydrodynamic (MHD) model to simulate Mars-solar wind interactions and found that crustal fields in the southern region of Mars inhibit the ion transport from low- to high-solar-zenith-angle areas, resulting in a reduction in ion number density and a thinner ionosphere near the southern terminator. Moreover, the crustal fields also have an inhibitory effect on the day-to-night transport. These effects may lead to a reduction in ion number density in the southern nightside ionosphere and a decrease in the global heavy-ion loss rate.
FRONTIERS IN ASTRONOMY AND SPACE SCIENCES
(2023)
Article
Astronomy & Astrophysics
Shaosui Xu, Janet G. Luhmann, David L. Mitchell, Tristan Weber, David A. Brain, Yingjuan Ma, Shannon M. Curry, Gina A. Dibraccio, Jasper Halekas, Suranga Ruhunusiri, Christian Mazelle, Robert J. Lillis, Benoit Langlais
Summary: In this study, the authors investigate the role of large-scale planetary fields in Mars's magnetospheric responses to the interplanetary magnetic field. They find that the dipole-like planetary field has a similar influence on Mars's magnetosphere as it does on Earth, resulting in a more open magnetosphere during certain conditions.
ASTROPHYSICAL JOURNAL LETTERS
(2023)
Article
Astronomy & Astrophysics
P. Kummamuru, G. Molera Calves, G. Cimo, S. V. Pogrebenko, T. M. Bocanegra-Bahamon, D. A. Duev, M. D. Md Said, J. Edwards, M. Ma, J. Quick, A. Neidhardt, P. de Vicente, R. Haas, J. Kallunki, G. Maccaferri, G. Colucci, W. J. Yang, L. F. Hao, S. Weston, M. A. Kharinov, A. G. Mikhailov, T. Jung
Summary: Researchers observed the radio signal transmitted by the Mars Express spacecraft from 2013 to 2020 using the EVN network and telescopes from the University of Tasmania. They developed a method to quantify the effects of plasma on the radio signal and determine the solar wind parameters. By analyzing the phase fluctuations and removing unwanted noises, they calculated the total electron content and identified a spectral index consistent with turbulence theory. However, they found higher observed values at higher solar elongations, possibly due to correlated uplink and downlink signals passing through identical plasma sheets.
PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF AUSTRALIA
(2023)
Article
Astronomy & Astrophysics
F. S. Mozer, O. V. Agapitov, J. C. Kasper, R. Livi, O. Romeo, I. Y. Vasko
Summary: The aim of this study is to determine the perpendicular and parallel proton heating rates in the solar wind. By removing the speed dependence, the perpendicular and parallel temperatures of protons were compared to the radial dependence. Perpendicular heating of protons was observed between 20 and 160 solar radii, while there was no heating or cooling of parallel protons below 70 solar radii. The heating rates that produced the perpendicular temperatures were estimated at different distances from the Sun.
ASTRONOMY & ASTROPHYSICS
(2023)
Article
Astronomy & Astrophysics
H. Nilsson, A. Moeslinger, H. N. Williamson, S. Bergman, H. Gunell, G. Stenberg Wieser, Y. Futaana, T. Karlsson, E. Behar, M. Holmstrom
Summary: This study estimates the upstream speed of the solar wind by analyzing the interactio1n between comet 67P and the solar wind. The analysis of the speed changes of H+ and He2+ particles indicates that they have the same speed in the upstream region, and the results are consistent with the Tao model. The study also derives the values of the reconstructed electrostatic potential, which serves as a measure of the slowing-down of the solar wind at the observation point.
ASTRONOMY & ASTROPHYSICS
(2022)
Article
Astronomy & Astrophysics
Sebastian Rojas Mata, Gabriella Stenberg Wieser, Yoshifumi Futaana, Alexander Bader, Moa Persson, Andrey Fedorov, Tielong Zhang
Summary: The proton population in Venus' plasma environment is characterized during periods of solar minimum and maximum. The study provides physical insight into solar-cycle-dependent plasma phenomena, such as mirror modes, and observes lower temperatures perpendicular and parallel to the magnetic field during solar maximum.
JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
(2022)
Article
Astronomy & Astrophysics
A. Pontoni, M. Shimoyama, Y. Futaana, S. Fatemi, A. R. Poppe, M. Wieser, S. Barabash
Summary: In this study, the expected sputtered flux of ENA from the surface of Ganymede is calculated to interpret future observations by ENA instruments. Simulation of magnetospheric plasma irradiation and ion precipitation is conducted, and the sputtered ENA rate from Ganymede, as well as the contributions of H2O, O-2, and H-2, are determined. The results demonstrate the capability of the JNA sensor to remotely map ion precipitation at Ganymede.
JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
(2022)
Article
Geosciences, Multidisciplinary
Xiao-Dong Wang, B. Klecker, G. Nicolaou, S. Barabash, M. Wieser, P. Wurz, A. Galli, F. Cipriani, Y. Futaana
Summary: Research shows that solar HENAs can be monitored to forecast SEP events several hours in advance. The characteristics of HENA observed on Earth depend on factors such as the properties of the shock wave and the density of the solar corona. Monitoring solar HENAs with current technologies can provide early warnings about SEP events.
EARTH AND PLANETARY PHYSICS
(2022)
Article
Astronomy & Astrophysics
A. Galli, A. Vorburger, S. R. Carberry Mogan, E. Roussos, G. Stenberg Wieser, P. Wurz, M. Foehn, N. Krupp, M. Fraenz, S. Barabash, Y. Futaana, P. C. Brandt, P. Kollmann, D. K. Haggerty, G. H. Jones, R. E. Johnson, O. J. Tucker, S. Simon, T. Tippens, L. Liuzzo
Summary: Investigating the environment and magnetospheric interaction of Jupiter's moon Callisto is crucial for understanding the origin and evolution of our Solar System and the emergence of habitable worlds around gas giants. This article reviews the current research on Callisto's environment and magnetospheric interaction and identifies science opportunities for observations to optimize scientific insight. These considerations will inform future model development and mission planning.
EARTH AND SPACE SCIENCE
(2022)
Article
Geochemistry & Geophysics
Chi Zhang, Zhaojin Rong, Lucy Klinger, Hans Nilsson, Zhen Shi, Fei He, Jiawei Gao, Xinzhou Li, Yoshifumi Futaana, Robin Ramstad, Xiaodong Wang, Mats Holmstrom, Stas Barabash, Kai Fan, Yong Wei
Summary: Using data from the Mars Atmosphere and Volatile EvolutioN mission, researchers conducted a statistical study on the magnetic field structure around Mars. They found that the magnetic field conforms to the pattern of an induced magnetosphere, with the interplanetary magnetic field from the solar wind draping around the planet and forming a tail. Field lines from both hemispheres sink toward the nightside magnetic equatorial plane, and there is asymmetry in the tail current sheet. The study also showed that the IMF B-x can induce kink-like field structures and enhance the field strength globally.
JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS
(2022)
Article
Astronomy & Astrophysics
Erika Palmerio, Christina O. Lee, Ian G. Richardson, Teresa Nieves-Chinchilla, Luiz F. G. Dos Santos, Jacob R. Gruesbeck, Nariaki Nitta, M. Leila Mays, Jasper S. Halekas, Cary Zeitlin, Shaosui Xu, Mats Holmstrom, Yoshifumi Futaana, Tamitha Mulligan, Benjamin J. Lynch, Janet G. Luhmann
Summary: This paper reports on a series of solar transient events that occurred in August 2018, during the declining phase of Solar Cycle 24. The study focuses on the origin, evolution, and heliospheric impact of these events, particularly two successive coronal mass ejections (CMEs) and a high-speed stream (HSS) towards Earth and Mars. The analysis suggests that the interaction between the CME and HSS caused the second CME to rotate and deflect in interplanetary space, emphasizing the importance of accurately reproducing the ambient solar wind even during simpler solar minimum periods.
SPACE WEATHER-THE INTERNATIONAL JOURNAL OF RESEARCH AND APPLICATIONS
(2022)
Article
Astronomy & Astrophysics
Yoshifumi Futaana, Manabu Shimoyama, Martin Wieser, Stefan Karlsson, Herman Andersson, Hans Nilsson, Xiao-Dong Wang, Andrey Fedorov, Nicolas Andre, Mats Holmstrom, Stas Barabash
Summary: Using the background counts from MCPs on the Mars Express and Venus Express orbiters, the study investigates the galactic cosmic ray (GCR) characteristics of the inner solar system. The results show that the MCP background counts at Mars and Venus exhibit clear anticorrelation with the sunspot number and contain GCR information. The study also reveals the depletion of background counts due to the absorption of GCR particles by the planets.
ASTROPHYSICAL JOURNAL
(2022)
Article
Geosciences, Multidisciplinary
Qi Xu, Xiaojun Xu, Pingbing Zuo, Yoshifumi Futaana, Qing Chang, Hao Gu
Summary: Using 8.5-year measurements from Venus Express, we discovered asymmetric plasma distributions in the Venusian magnetosheath. A plume of pickup oxygen ions forms in the hemisphere where the motional electric field points outward, while solar wind protons move faster in the opposite hemisphere. The escape rate of pickup O+ ions is mainly controlled by EUV radiation.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Astronomy & Astrophysics
Sebastian Rojas Mata, Gabriella Stenberg Wieser, Yoshifumi Futaana, Tielong Zhang
Summary: Proton plasma asymmetries between the hemispheres of Venus' dayside magnetosheath are characterized and compared to analogous Earth studies to understand the plasma phenomena contributing to the observed asymmetries. Data on magnetosheath proton densities, speeds, temperatures, and magnetic-field strengths are used to calculate ratios and quantify the asymmetries. The results show similarities with Earth, but also differences in the temperature anisotropy, suggesting the influence of different spatial scales on plasma properties.
JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
(2023)
Article
Astronomy & Astrophysics
C. Signoles, M. Persson, Y. Futaana, S. Aizawa, N. Andre, S. Bergman, A. Fedorov, V. Lindwall, N. Martinez, C. Mazelle, S. Rojas Mata, A. Wolff, T. L. Zhang
Summary: Investigations of the boundaries and their variability of the induced magnetosphere on Venus can help us understand the solar wind's effect on Venus and unmagnetized planets. Using data from Venus Express, this study finds that the location of the bow shock is mainly influenced by the solar cycle and dynamic pressure, while the ion composition boundary shows clear changes during solar maximum but no clear trends during solar minimum.
ASTROPHYSICAL JOURNAL
(2023)
Article
Astronomy & Astrophysics
Qi Zhang, Mats Holmstrom, Xiao-dong Wang, Hans Nilsson, Stas Barabash
Summary: This study applies a new method to estimate the escape of heavy ions from Mars. It shows that solar upstream conditions, such as high EUV radiation, increasing solar wind dynamic pressure, and decreasing IMF strength, have an impact on the heavy ion loss. The escape rate is highest under high EUV conditions, increases with increasing solar wind dynamic pressure, and decreases with increasing IMF strength.
JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
(2023)
Article
Astronomy & Astrophysics
Cyril Simon Wedlund, Martin Volwerk, Christian Mazelle, Sebastian Rojas Mata, Gabriella Stenberg Wieser, Yoshifumi Futaana, Jasper Halekas, Diana Rojas-Castillo, Cesar Bertucci, Jared Espley
Summary: This series of papers presents statistical maps of mirror-mode-like structures in the magnetosheaths of Mars and Venus and calculates the probability of detecting them in spacecraft data. The study aims to compare these structures on both planets using similar tools and payload, considering factors such as solar flux levels and Mars Year. The study detected events resembling mirror-mode structures in the magnetometer data of the MAVEN spacecraft, with a detection probability of about 1% for any given controlling parameter.
ANNALES GEOPHYSICAE
(2023)
Article
Chemistry, Analytical
Qian Zhang, Ruijie Xu, Rong Xue, Xi Mei, Yuwen Qin, Ke Shen, Jinguo Xu, Lianlin Su, Chunqin Mao, Hui Xie, Tulin Lu
Summary: In this study, a method combining component analysis and integrated network analysis was developed to evaluate and characterize the differences in different processed products of Qingpi, and potential quality markers were identified. Additionally, it was found that Qingpi may treat liver disease by affecting ten main targets and pathways.
JOURNAL OF SEPARATION SCIENCE
(2023)
Article
Astronomy & Astrophysics
Beatriz Sanchez-Cano, Olivier Witasse, Elise W. Knutsen, Dikshita Meggi, Shayla Viet, Mark Lester, Robert F. Wimmer-Schweingruber, Marco Pinto, Richard Moissl, Johannes Benkhoff, Hermann Opgenoorth, Uli Auster, Jos de Brujine, Peter Collins, Guido De Marchi, David Fischer, Yoshifumi Futaana, James Godfrey, Daniel Heyner, Mats Holmstrom, Andrew Johnstone, Simon Joyce, Daniel Lakey, Santa Martinez, David Milligan, Elsa Montagnon, Daniel Mueller, Stefano A. Livi, Timo Prusti, Jim Raines, Ingo Richter, Daniel Schmid, Peter Schmitz, Hakan Svedhem, Matt G. G. T. Taylor, Elena Tremolizzo, Dimitri Titov, Colin Wilson, Simon Wood, Joe Zender
Summary: Despite the limited number of spacecraft with dedicated instrumentation for Space Weather monitoring, this study shows the potential of using housekeeping sensors on spacecraft to detect radiation hazards produced by solar particle events. The results demonstrate the feasibility of using engineering datasets to infer information about the solar particle environment at each spacecraft location, thus providing a network of solar particle detections where scientific observations are unavailable.
SPACE WEATHER-THE INTERNATIONAL JOURNAL OF RESEARCH AND APPLICATIONS
(2023)