Search Publications
Radial evolution of the accuracy of ballistic solar wind backmapping
Maksimovic, M.; Démoulin, P.; Badman, S. T. +4 more
Context. Solar wind backmapping is a technique employed to connect in situ measurements of heliospheric plasma structures to their origin near the Sun. The most widely used method is ballistic mapping, which neglects the effects of solar wind acceleration and corotation and instead models the solar wind as a constant radial outflow whose speed is …
Evolution of coronal mass ejections with and without sheaths from the inner to the outer heliosphere: Statistical investigation for 1975 to 2022
Temmer, M.; Larrodera, C.
Aims: This study covers a thorough statistical investigation of the evolution of interplanetary coronal mass ejections (ICMEs) with and without sheaths through a broad heliocentric distance and temporal range. The analysis treats the sheath and magnetic obstacle (MO) separately in order to gain more insight on their physical properties. In de…
The unexpected role of heliospheric boundaries in facilitating interstellar dust penetration at 1-5 AU
Izmodenov, V. V.; Godenko, E. A.
Aims: Interstellar dust (ISD) particles penetrate the heliosphere because of the relative motion of the local interstellar cloud and the Sun. The penetrated particles pass through the heliospheric interface, that is, the region in which solar wind and interstellar plasma interact. As a result, the ISD flow is modified after the passage throug…
NIRwave: A wave-turbulence-driven solar wind model constrained by PSP observations
Güdel, M.; Boro Saikia, S.; Bartel, M. +2 more
Aims: We generate a model description of the solar wind based on an explicit wave-turbulence-driven heating mechanism, and constrain our model with observational data.
Methods: We included an explicit coronal heating source term in the general 3D magnetohydrodynamic code NIRVANA to simulate the properties of the solar wind. The adapted h…
Particle monitoring capability of the Solar Orbiter Metis coronagraph through the increasing phase of solar cycle 25
Gissot, S.; Sasso, C.; Romoli, M. +26 more
Context. Galactic cosmic rays (GCRs) and solar particles with energies greater than tens of MeV penetrate spacecraft and instruments hosted aboard space missions. The Solar Orbiter Metis coronagraph is aimed at observing the solar corona in both visible (VL) and ultraviolet (UV) light. Particle tracks are observed in the Metis images of the corona…
Influence of the interstellar magnetic field and 11-year cycle of solar activity on the heliopause nose location
Bladek, Piotr; Ratkiewicz, Romana
Context. The heliosphere is formed by the interaction between the solar wind (SW) plasma emanating from the Sun and a magnetised component of local interstellar medium (LISM) inflowing on the Sun. A separation surface called the heliopause (HP) forms between the SW and the LISM.
Aims: In this article, we define the nose of the HP and investig…
HCS background magnetic field study HYTARO+
Hidalgo, M. A.; Blanco, J. J.; Arrazola, D.
Context. HYTARO+ is an analytical model developed to evaluate the influence of the solar magnetic dipole in the topology of the local structure of the heliospheric current sheet (HCS).
Aims: Statistical methods such as MVA, which are typically used in the study of the HCS come with two limitations. On one hand, they do not provide any informa…
The nature of the solar wind electron temperature and electron heat flux. II. Case of a spiral interplanetary magnetic field
Salem, Chadi S.; Pulupa, Marc; Hubert, Daniel
Aims: We aim to analyze the solutions of the solar wind electron energy equation in a spherical expansion with a spiral interplanetary magnetic field (IMF), a radial power law of the electron heat flux with a constant index α, and a constant or a smooth increase of the solar wind speed.
Methods: Generic analytical electron temperature pr…
The importance of Fe fragmentation for LiBeB analyses. Is a Li primary source needed to explain AMS-02 data?
Maurin, D.; Ferronato Bueno, E.; Génolini, Y. +2 more
Context. High-precision data from AMS-02 on Li, Be, and B provide the best constraints on Galactic cosmic-ray transport parameters.
Aims: We re-evaluate the impact of Fe fragmentation on the Li, Be, and B modelling. We discuss the consequences on the transport parameter determination and reassess whether a primary source of Li is needed to ma…
Revisiting Ulysses electron data with a triple fit of velocity distributions
Fichtner, H.; Scherer, K.; Lazar, M. +1 more
Context. Given their uniqueness, the Ulysses data can still provide us with valuable new clues about the properties of plasma populations in the solar wind, and especially about their variations with heliographic coordinates. In the context of kinetic waves and instabilities in the solar wind plasma, the electron temperature anisotropy plays a cru…