Physics
Scientific paper
Dec 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002agufmsh52a0448f&link_type=abstract
American Geophysical Union, Fall Meeting 2002, abstract #SH52A-0448
Physics
7509 Corona, 7513 Coronal Mass Ejections
Scientific paper
We present a 3-D density model of the solar corona, determined from synoptic maps of Carrington Rotations 1942-3 (22 Oct. 1998 - 18 Nov. - 15 Dec. 1998). The rotations we have chosen include the time period of the SPARTAN 201-05 flight (Nov. 1-3, 1998), which had unprecedented spatial and temporal coverage of the white light corona. These rotations are also useful because they occur at a point in the solar cycle (ascending phase) that is complex enough to exhibit interesting 3-D structure, yet not so dynamic that a meaningful density model cannot be constructed using the rotation of the sun to provide the 3-D information. Along with SPARTAN data, we consider observations made by the Mark IV instrument in the Mauna Loa Observatory, and also SOHO/LASCO and EIT observations. Our analytic model, an extension of the axisymmetric model of Guhathakurta et al (1996), allows for multiple streamers varying in both latitude and longitude, and explicitly treats nonradial streamers. Our 3-D model will be useful for testing analysis techniques for the upcoming STEREO mission. We will also compare its structure to magnetic field extrapolation models, coronal hole boundaries, and magnetic neutral lines.
Foster David
Gibson Sarah Elizabeth
Guhathakurta Madhulika
Holzer Thomas
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