Search Publications
Determining the Full Halo Coronal Mass Ejection Characteristics
Fainshtein, V. G.
Observing halo coronal mass ejections (HCMEs) in the coronagraph field of view allows one to only determine the apparent parameters in the plane of the sky. Recently, several methods have been proposed allowing one to find some true geometrical and kinematical parameters of HCMEs. In most cases, a simple cone model was used to describe the CME sha…
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.…
The characteristics of thunder on Titan.
Petculescu, Andi
ASPOC Data Products in the Cluster Active Archive
Torkar, K.; Jeszenszky, H.
The instrument ASPOC (Active Spacecraft Potential Control) controls the electric potential of the Cluster spacecraft by means of an ion beam. This modification of the charge balance improves the plasma measurements on board. Beneficial effects have also been observed for the electric field measurements by double probes (EFW). Comprehensive knowled…
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…
Wave angular momentum and the evolution of planetary rings
Dranikov, I. L.; Fridman, A. M.
A theory is proposed that provides angular momentum conservation through the acoustic drift mechanism for gap and ringlet formation in planetary rings. In this context, a new variant of drift mechanism is found, which is dominant if the collision frequency is of the order of the orbital frequency or less. An angular pseudo-momentum equation is der…
Spectral and Photometric Researches of RY Tau
Ismailov, N. Z.; Adigozalzade, H. N.
The results of analysis of the total light curve of the classic T Tauri type star RY Tau were presented. For a time at last 48 years a brightness of the star is characterized by fluctuations with amplitude about ΔV ∼1m, with characteristic time about 300 days. Firstly we were showed, that in an interval of 1983 - 2004 in V-band light va…
AKARI results on the Taurus-Auriga star forming region
Tamura, Motohide; Marton, Gabor; Kawamura, Akiko +3 more
We present an analysis of AKARI Far-Infrared Surveyor, Spitzer Space Telescope Infrared Array Camera and Mid-Infrared Photometer for Spitzer data as well as various other photometric data of the Taurus-Auriga region. Our aim was to locate and describe young stellar objects (YSO), and to test the potential of AKARI FIS data in the classification of…
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…
Ulysses Dust Detection System V3.1
Dikarev, V.; Srama, R.; Hamilton, D. P. +26 more
This data set contains the data from the Ulysses dust detector system (UDDS) from start of mission through the end of mission, 1990-2007. (As the dust detector was turned off after Nov. 30, 2007, this is the last date for which UDDS data is recorded.) Included are the dust impact data, noise data, laboratory calibration data, and location and orie…