Search Publications
Studying the Lunar-Solar Wind Interaction with the SARA Experiment aboard the Indian Lunar Mission Chandrayaan-1
Barabash, Stas; Holmström, Mats; Wieser, Martin +7 more
The first Indian lunar mission Chandrayaan-1 was launched on 22 October 2008. The Sub-keV Atom Reflecting Analyzer (SARA) instrument onboard Chandrayaan-1 consists of an energetic neutral atom (ENA) imaging mass analyzer called CENA (Chandrayaan-1 Energetic Neutrals Analyzer), and an ion-mass analyzer called SWIM (Solar wind Monitor). CENA perform…
A CME-ICME study using data from SOHO and Ulysses
Dumitrache, Cristiana; Popescu, Nedelia A.; Oncica, Adrian
We analyze the solar source of a CME occurred on 2 March 2002, the follow up of its travel through the interplanetary space and the characteristics of the ICME registered by Ulysses satellite.
Coronal Radio Sounding Experiments with Mars Express: Scintillation Spectra during Low Solar Activity
Pätzold, M.; Bird, M. K.; Tellmann, S. +5 more
Coronal radio sounding observations were carried out with the radio science experiment MaRS on the ESA spacecraft Mars Express during the period from 25 August to 22 October 2004. Differential frequency and log-amplitude fluctuations of the dual-frequency signals were recorded during a period of low solar activity. The data are applicable to low h…
The Interstellar Heliopause Probe/Heliospheric Explorer: IHP/HEX
Wimmer-Schweingruber, Robert F.; McNutt, Ralph L.
The Sun, driving a supersonic solar wind, cuts out of the local interstellar medium a giant plasma bubble, the heliosphere. Dedicated deep-space missions have greatly enhanced our understanding of our immediate neighborhood. Ulysses is the only spacecraft exploring the third, out-of-ecliptic dimension, while SOHO has allowed us to better understan…
On The Possible Mechanism Of Energy Dissipation In Shock-Wave Fronts Driven Ahead Of Coronal Mass Ejections
Eselevich, M. V.; Eselevich, V. G.
Analysis of Mark 4 and LASCO C2, C3 coronagraph data shows that, at the distance R<=0 Rsolar from the center of the Sun, the thickness of a CME-generated shock-wave front (δF) may be of order of the proton mean free path. This means that the energy dissipation mechanism in the shock front at these distances is collisional.…
SOHO/ACE observations of two consecutive CMEs from the same source region
Romoli, M.; Mandrini, C. H.; Dasso, S. +2 more
On June 2, 2003, SOHO/LASCO coronagraph observed two CMEs at the West limb of the Sun, at 00.30 and 08:54 UT, respectively, which appeared to originate from the same source region. Both CMEs show the typical three-part structure. These events have been also observed by SOHO/UVCS, allowing us to infer their physical parameters. We also looked for i…
Energetic Particles and Upstream Waves at Co-rotating Shocks
Zhou, Xiaoyan; Smith, Edward J.
We report a study of energetic ion acceleration at shocks bounding co-rotating interaction regions (CIRs). Archived data obtained by Ulysses magnetic field, solar wind and energetic particle investigations at low latitude CIRs have been assembled and analyzed. The statistical relations between various properties of 22 Forward shocks, energetic par…
Waves at the plasma frequency inside magnetic holes: STEREO and Cluster observations
Bale, S. D.; Goetz, K.; Soucek, J. +2 more
Magnetic isolated large amplitude depressions in the interplanetary magnetic field are commonly observed in the solar wind. Some of these magnetic structures are accompanied by bursts of electrostatic waves close to electron plasma frequency. Combining STEREO/WAVES and IMPACT data we are able to accurately localize the waves emission. We show that…
Observations of the 3D coronal structure over a solar cycle
Morgan, Huw; Habbal, Shadia
Solar rotational tomography is applied to almost eleven years of LASCO C2/SOHO data, revealing for the first time the structural behavior of streamers over almost a full solar activity cycle. Streamers are most often shaped as extended, narrow plasma sheets. The sheets can be extremely narrow at times (<=0.14×106 km at 4Rsolar
Observation of Langmuir waves in the solar wind and the role of the antenna effective length
Pickett, J. S.; Souček, J.; Santolík, O. +3 more
Recently it was shown that in resonance regions the antenna effective length can exceed its physical length. Here we show that this happens in reception of Langmuir waves in a streaming solar wind and we discuss the relevant observations of narrow band emissions observed by CLUSTER II.