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Dayside Aurorae And Polar Arcs Under South-East Imf Orientation, P. E. Sandholt, M. Dyrland, Charlie J. Farrugia
Dayside Aurorae And Polar Arcs Under South-East Imf Orientation, P. E. Sandholt, M. Dyrland, Charlie J. Farrugia
Coronal Mass Ejection Research Group
We document a characteristic spatial and temporal structure of the aurora in the postnoon sector present during a 10-h-long interval of very steady southeast IMF orientation (clock angle=135°) ending in a sharp south-to-north transition. Focus is placed on the detailed morphology of auroral forms/activities corresponding to merging and lobe convection cells obtained from SuperDARN convection data and Greenland magnetograms. The ground optical instruments at Ny Ålesund, Svalbard (76° MLAT) recorded different auroral forms/activities as the station moved to higher magnetic local times (MLTs) in the 13:00–17:00 MLT sector. Whereas the 13:00–15:00 MLT sector is characterized by classical poleward moving auroral …
Characteristics Of Merging At The Magnetopause Inferred From Dayside 557.7-Nm All-Sky Images: Imf Drivers Of Poleward Moving Auroral Forms, N. C. Maynard, W. J. Burke, Y. Ebihara, D. M. Ober, G. R. Wilson, K. D. Siebert, J. D. Winningham, L. J. Lanzerotti, Charlie J. Farrugia, E. Ejiri, H. Reme, A. Balogh, A. Fazakerley
Characteristics Of Merging At The Magnetopause Inferred From Dayside 557.7-Nm All-Sky Images: Imf Drivers Of Poleward Moving Auroral Forms, N. C. Maynard, W. J. Burke, Y. Ebihara, D. M. Ober, G. R. Wilson, K. D. Siebert, J. D. Winningham, L. J. Lanzerotti, Charlie J. Farrugia, E. Ejiri, H. Reme, A. Balogh, A. Fazakerley
Coronal Mass Ejection Research Group
We combine in situ measurements from Cluster with high-resolution 557.7 nm all-sky images from South Pole to investigate the spatial and temporal evolution of merging on the dayside magnetopause. Variations of 557.7 nm emissions were observed at a 6 s cadence at South Pole on 29 April 2003 while significant changes in the Interplanetary Magnetic Field (IMF) clock angle were reaching the magnetopause. Electrons energized at merging sites are the probable sources for 557.7 nm cusp emissions. At the same time Cluster was crossing the pre-noon cusp in the Northern Hemisphere. The combined observations confirm results of a previous study …
Theoretical Modeling For The Stereo Mission, Marcus J. Aschwanden, L. F. Burlaga, M. L. Kaiser, C. K. Ng, D. V. Reames, M. J. Reiner, Tamas I. Gombosi, Noe Lugaz, Ward B. Manchester Iv, Ilia I. Roussev, Thomas H. Zurbuchen, Charlie J. Farrugia, Antoinette B. Galvin, M. A. Lee, J. A. Linker, Z. Mikic, Pete Riley, D. Alexander, A. W. Sandman, J. W. Cook, R. A. Howard, D. Odstrcil, V. J. Pizzo, J. Kota, Et Al.
Theoretical Modeling For The Stereo Mission, Marcus J. Aschwanden, L. F. Burlaga, M. L. Kaiser, C. K. Ng, D. V. Reames, M. J. Reiner, Tamas I. Gombosi, Noe Lugaz, Ward B. Manchester Iv, Ilia I. Roussev, Thomas H. Zurbuchen, Charlie J. Farrugia, Antoinette B. Galvin, M. A. Lee, J. A. Linker, Z. Mikic, Pete Riley, D. Alexander, A. W. Sandman, J. W. Cook, R. A. Howard, D. Odstrcil, V. J. Pizzo, J. Kota, Et Al.
Coronal Mass Ejection Research Group
We summarize the theory and modeling efforts for the STEREO mission, which will be used to interpret the data of both the remote-sensing (SECCHI, SWAVES) and in-situ instruments (IMPACT, PLASTIC). The modeling includes the coronal plasma, in both open and closed magnetic structures, and the solar wind and its expansion outwards from the Sun, which defines the heliosphere. Particular emphasis is given to modeling of dynamic phenomena associated with the initiation and propagation of coronal mass ejections (CMEs). The modeling of the CME initiation includes magnetic shearing, kink instability, filament eruption, and magnetic reconnection in the flaring lower corona. The …