Solar Physics Division Meeting 2000, June 19-22
Session 2. Corona, Solar Wind, Flares, CMEs, Solar-stellar, Instrumentation, Other
Display, Chair: J. Krall, Monday-Thursday, June 19, 2000, 8:00am-6:00pm, Forum Ballroom

[Previous] | [Session 2] | [Next]

[2.28] Evolution of the Solar Corona From Cycle 22 to Cycle 23 As Revealed by X-ray Limb Synoptic Maps

G.L. Slater, S.L. Freeland (Lockheed Martin Solar and Astrophysics Laboratory), B.J. LaBonte, J. Li (Institute for Astronomy, University of Hawaii), L.W. Acton (Montana State University)

How does the solar corona vary within a solar cycle? We present time series observations assembled from the Yohkoh Soft X-ray Telescope (SXT) full mission image database which reveal coronal structures in the inner corona that are not easily identifiable in individual images. We have generated limb synoptic maps prepared from SXT data taken over 8 years (1992 through 1999). This period covers the decay phase of solar cycle 22 and the rise phase of solar cycle 23. The SXT images have recently been re-calibrated using more precise techniques. We will address such topics as the variation of the polar coronal holes, the lifetimes of active regions and associated streamers, and the nature of polar plumes in the two phases of the solar cycle.

The author(s) of this abstract have provided an email address for comments about the abstract:

[Previous] | [Session 2] | [Next]