One of the scientific objectives Rosetta mission is to investigate diamagnetic cavity comet 67P/Churyumov–Gerasimenko. We employed combined data several instruments Plasma Consortium identify and study crossing events. Using electron from Ion Electron Sensor complement Magnetometer enabled us work out a search criterion for events based on unique signature we identified in spectrum. Although this insufficient find all events, were able an abundance more than one hundred crossings obtained...

After the first detection of diamagnetic cavity comet 67P/Churyumov–Gerasimenko, it became apparent that boundary this plasma region is very dynamic. To date hundreds short crossing events were detected, none lasting longer than an hour. This intermittent set different from classical observation near 1P/Halley, where Giotto remained continuously inside cavity. The distance at 67P larger predicted by recent models, so was not clear whether these cavity-like regions are connected to a global...

Solar wind parameters at different locations in the inner heliosphere can be estimated using various solar extrapolation methods. The simple ballistic method extrapolates from point of measurement to a chosen heliospheric position by assuming that major structures are persistent and arrive relatively unaltered target position. considers rotation period Sun while constant speed during radial propagation. We improve model considering interaction between slow fast with pressure correction...

Aims : The solar wind pressure is an important parameter of space weather, which plays a crucial role in the interaction with planetary plasma environment. Here we investigate possibility determining proxy from Rosetta magnetic field data, measured deep inside induced magnetosphere comet 67P/Churyumov-Gerasimenko. This would be useful not only for other related studies but could also serve as new, independent input database weather propagation to locations Solar System. Method For...

The Rosetta spacecraft, traversing the inner magnetosphere of comet 67P/Churyumov-Gerasimenko, observed medium-energy ions cometary origin. These ions, moving in direction nucleus, are likely accelerated outer regions comet's magnetosphere. Emerging from low-energy ion background, their signal can reach energies between 50 and 1000 eV over a few hours or days spectrum measured by RPC IES sensor Rosetta. Over similar time scale, they gradually lose energy before disappearing again...

In order to improve the predictions of ambient solar wind plasma at planets, moons, comets, and interplanetary spacecraft, we are conducting a multi-spacecraft investigation study spatial variation temporal evolution structures. Here present our results on by investigating impact latitudinal spacecraft-target separation extrapolation accuracy. Using ballistically propagated bulk velocity datasets ACE, STEREO A, Parker Solar Probe, Orbiter perform statistical analyses case studies. Our...

ABSTRACT The Rosetta spacecraft observed the temporal evolution of ion populations within ionosphere comet 67P/Churyumov–Gerasimenko. A striking feature spectrum is represented by so-called medium-energy peaks, which recurrently emerge from low-energy background with their energy levels typically reaching 50 to 1000 eV before gradually decreases, and they disappear measurements. These peaks are believed be caused space weather forcing, but there was no conclusive evidence until now. We...

Directional discontinuities (DDs) are common structures in the solar wind plasma and among most important besides shock waves. The Parker Solar Probe Orbiter spacecraft currently provide whole new insight into inner heliosphere spatial coverage timescales. We search for DDs classify them subgroups of tangential (TD) rotational (RD) discontinuities. analysis DD thicknesses allows us to test different theories about their origin evolution. applied an automatic algorithm select between...

After accompanying comet 67P/Churyumov–Gerasimenko on its journey around the Sun and observing evolution of induced magnetosphere throughout comet's life-cycle, Rosetta operations concluded at end September 2016 with a controlled impact cometary nucleus. At that time, was located more than 3.7 AU from Sun, but data still show clear indications weak well developed plasma environment observed this fading along multiple recurring elliptical orbits, which allow us to investigate properties...

<p>In order to build a diverse, inclusive community of geoscientists within Europe, statistical study is carried out based on participation statistics different conferences in Europe over the past five years. Data geoscience (EGU, IUGG), planetary (EPSC) and solar-terrestrial science (ESWW, ESPM) are investigated. Special focus given historical division between Eastern Western senior junior scientists. The aim show that geographical continues exist does not general improving...

<p>Rosetta observed medium-energy ions around comet 67P/Churyumov-Gerasimenko while orbiting deep inside the coma. These are thought to be accelerated towards anti-sunward direction by some acceleration mechanism in outer regions of cometary magnetosphere. They usually reach energies up 100-1000 eV and undergo deceleration dense neutral coma surrounding nucleus. appear ion dynamic spectrum as a new population rising from low energy background, their peaking 1000 then decreasing...

<p>The dynamic changes of Mercury’s Na exosphere are investigated here, in relation to space weather conditions. Sodium plays a special role exosphere: due its strong resonance D lines at 5890-95Å it has been observed and monitored by Earth-based telescopes for decades. Different highly variable patterns Na-emission have identified. In addition the release processes already studied extensively past, we aim here investigate following factors more...

<p>Determining the ion bulk velocity is essential to understand physics of inner magnetosphere comets. This controls strength ion-neutral drag force, which plays a very important role in energy and momentum transfer processes that region. Unfortunately there are no direct measurements this quantity available. The thresholds instruments on board Rosetta orbiter would prevent detection content plasma as long relatively slow cold. picture further complicated by spacecraft...

<p>Solar wind parameters, such as the velocity, density or pressure of solar wind, are one most important factors in space physics, and their knowledge at many points heliosphere possible contributes to a broader understanding our system.</p><p>Solar parameters various inner estimated using extrapolation methods. Currently, all spacecraft measuring ecliptic plane, thus it is enough extrapolate data from probes other celestial bodies near ecliptic....

<p>The solar wind properties at a given point in the heliosphere depend strongly on source surface characteristics, dynamical effects during propagation and transient events. We study background structures after modelling their throughout 3-dimensional heliosphere. remove events from observations, then apply ballistic method corrected for pressure gradients stream interactions. A detailed multi-spacecraft investigation of radial latitudinal improves our model. These results are...

<p>Co-rotating Interaction Regions are complex and fascianting structures in the Heliosphere that <br>play an important role space weather. They arise from fast solar wind interacting with the <br>slow streams. The interface between slow is called stream <br>interface, it common for CIRs to produce forward shock at leading edge reverse <br>shock trailing edge. often have...

<p>The Parker Solar Probe and Orbiter spacecraft make whole new spatial time scales available in the inner Heliosphere. With these data, we study directional discontinuities that are common structures solar wind this region. Their radial distribution can provide insight into physical processes of virtually collisionless plasma. Applying a method (Erdős & Balogh, 2008) based on minimum variance analysis to select magnetic field determine their number as...

<div>The importance of background solar wind is unquestionable as it carries information on the surface conditions and has a major role in space weather events. The current minimum perfect time period for investigations regarding this field, with several probes providing in-situ measurements.</div><div> </div><div>Our aim to determine spatial variations through multi-spacecraft data analysis, including recent...