Journal ArticleDOI
The SOHO/LASCO CME Catalog
Nat Gopalswamy,Seiji Yashiro,G. Michalek,Guillermo Stenborg,Angelos Vourlidas,S. Freeland,R. A. Howard +6 more
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TLDR
The SOHO/LASCO CME catalog as mentioned in this paper is a data base for the analysis of coronal mass ejections (CMEs) in the solar corona.Abstract:
Coronal mass ejections (CMEs) are routinely identified in the images of the solar corona obtained by the Solar and Heliospheric Observatory (SOHO) mission’s Large Angle and Spectrometric Coronagraph (LASCO) since 1996. The identified CMEs are measured and their basic attributes are cataloged in a data base known as the SOHO/LASCO CME Catalog. The Catalog also contains digital data, movies, and plots for each CME, so detailed scientific investigations can be performed on CMEs and the related phenomena such as flares, radio bursts, solar energetic particle events, and geomagnetic storms. This paper provides a brief description of the Catalog and summarizes the statistical properties of CMEs obtained using the Catalog. Data products relevant to space weather research and some CME issues that can be addressed using the Catalog are discussed. The URL of the Catalog is: http://cdaw.gsfc.nasa.gov/CME_list.read more
Citations
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Journal ArticleDOI
Two Classes of Eruptive Events During Solar Minimum
TL;DR: In this paper, the authors studied the dynamics of the coronal magnetic field during solar minimum and found that these events fall into two distinct classes: one set of events are caused by eruption and ejection of low-lying coronal flux ropes, and they could explain the origin of occasional CMEs during the solar minimum.
Journal ArticleDOI
Particle energization during solar maximum: diffusive shock acceleration at multiple shocks
L. Neergaard Parker,Gary P. Zank +1 more
TL;DR: In this article, a model for the acceleration of particles at multiple shocks using an approach related to box models is presented, where a distribution of particles is diffusively accelerated inside the box while simultaneously experiencing decompression through adiabatic expansion and losses from the convection and diffusion of particles out of the box by either the method used in Melrose & Pope and Pope & Melrose or by the approach introduced in Zank et al. where they solve the transport equation by a method analogous to operator splitting.
Journal ArticleDOI
Active Region Contributions to the Solar Wind over Multiple Solar Cycles
David Stansby,Lucie M. Green,Lidia van Driel-Gesztelyi,Lidia van Driel-Gesztelyi,Lidia van Driel-Gesztelyi,Timothy S. Horbury +5 more
TL;DR: In this paper, the authors use photospheric magnetic field maps observed over the past four solar cycles to estimate what fraction of magnetic open solar flux is rooted in active regions, a proxy for the fraction of all solar wind originating in active areas, finding that the fractional contribution of active regions to the solar wind varies between 30% to 80% at any one time during solar maximum and is negligible at solar minimum, showing a strong correlation with sunspot number.
Journal ArticleDOI
Mechanisms and Observations of Coronal Dimming for the 2010 August 7 Event
TL;DR: In this article, the authors apply this understanding to a coronal dimming event with an associated CME that occurred on 2010 August 7, and find that nearly 100% of the dimming is due to mass loss in the corona.
Journal ArticleDOI
Small-scale motions in solar filaments as the precursors of eruptions
Daikichi Seki,Kenichi Otsuji,Hiroaki Isobe,Takako T. Ishii,Kiyoshi Ichimoto,Kazunari Shibata +5 more
TL;DR: Seki et al. as mentioned in this paper observed that the standard deviation of the line-of-sight (LOS) velocities of the small-scale motions in a filament increased prior to its eruption.
References
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Journal ArticleDOI
The Large Angle Spectroscopic Coronagraph (LASCO): Visible light coronal imaging and spectroscopy
G. E. Brueckner,Russell A. Howard,M. J. Koomen,Clarence M. Korendyke,D. J. Michels,Dennis G. Socker,Philippe Lamy,Antoine Llebaria,J. Maucherat,Rainer Schwenn,G. M. Simmett hand D. K. Bedford,C. J. Eyles +11 more
TL;DR: The Large Angle Spectroscopic Coronagraph (LASCO) is a triple coronagraph being jointly developed for the Solar and Heliospheric Observatory (SOHO) mission as discussed by the authors.
Journal ArticleDOI
EIT: Extreme-UltraViolet Imaging Telescope for the SOHO Mission
Jean-Pierre Delaboudiniere,G. E. Artzner,Jacqueline Brunaud,A. H. Gabriel,Jean-François Hochedez,F. Millier,X. Y. Song,B. Au,Kenneth P. Dere,Russell A. Howard,R. W. Kreplin,D. J. Michels,John D. Moses,Jean-Marc Defise,Claude Jamar,Pierre Rochus,J. P. Chauvineau,J. P. Marioge,R. C. Catura,James R. Lemen,L. Shing,Robert A. Stern,Joseph B. Gurman,Werner M. Neupert,A. Maucherat,Frédéric Clette,P. Cugnon,E. L. Van Dessel +27 more
TL;DR: The Extreme-ultraviolet Imaging Telescope (EIT) as discussed by the authors provides wide-field images of the corona and transition region on the solar disc and up to 1.5 R⊙ above the solar limb.
Book ChapterDOI
The Large Angle Spectroscopic Coronagraph (LASCO)
Guenter E. Brueckner,R. A. Howard,M. J. Koomen,Clarence M. Korendyke,D. J. Michels,John D. Moses,Dennis G. Socker,Kenneth P. Dere,Philippe Lamy,Antoine Llebaria,M. V. Bout,Rainer Schwenn,G. M. Simnett,D. K. Bedford,C. J. Eyles +14 more
TL;DR: The Large Angle Spectroscopic Coronagraph (LASCO) is a three coronagraph package which has been jointly developed for the Solar and Heliospheric Observatory (SOHO) mission by the Naval Research Laboratory (USA), the Laboratoire d'Astronomie Spatiale (France), the Max-Planck-Institut fur Aeronomie (Germany), and the University of Birmingham (UK) as discussed by the authors.
Journal ArticleDOI
Waves: The Radio and Plasma Wave Investigation on the Wind Spacecraft
Jean-Louis Bougeret,M. L. Kaiser,Paul J. Kellogg,R. Manning,K. Goetz,S. J. Monson,N. Monge,L. Friel,C. A. Meetre,C. Perche,L. Sitruk,Sang Hoang +11 more
TL;DR: The WAVES investigation on the WIND spacecraft will provide comprehensive measurements of the radio and plasma wave phenomena which occur in Geospace as mentioned in this paper, in coordination with the other onboard plasma, energetic particles, and field measurements will help us understand the kinetic processes that are important in the solar wind and in key boundary regions of the Geospace.
Journal ArticleDOI
Interplanetary acceleration of coronal mass ejections
Nat Gopalswamy,Alejandro Lara,R. P. Lepping,M. L. Kaiser,D. Berdichevsky,D. Berdichevsky,O. C. St. Cyr +6 more
TL;DR: In this article, an empirical model was proposed to predict the arrival of CMEs at 1 AU, based on the relation between the acceleration and initial speed of the CME.
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