AAS 204th Meeting, June 2004
Session 20 Magnetic Fields
SPD Oral, Monday, May 31, 2004, 10:00-11:30am, 702

[Previous] | [Session 20] | [Next]

[20.07] Observations of the "Extended Solar Cycle" During Solar Cycle 23

R. C. Altrock (Air Force Research Laboratory)

Altrock (1997, Solar Phys. 170, 411-423) previously observed high-latitude Fe XIV 530.3 nm emission features during solar cycles 21 and 22 at the National Solar Observatory at Sacramento Peak. He found that the observations supported the concept of "Extended" Solar Cycles, which begin every 11 years but last for approximately 19-20 years. This concept is based on observations by several earlier investigators extending back to 1957 (see Wilson et al., 1988, Nature 333, 748-750, for references). More recent investigations of high-latitude coronal activity have used satellite observations (cf. Benevolenskaya, Kosovichev and Scherrer, 2001, Astrophys. J. 554, L107-L110). This paper will compare the results of Altrock (1997) with newer data to determine if the earlier inferences of Extended Solar Cycles find added support during solar cycle 23. In addition, I will compare the results of these ground-based studies with those obtained using satellite data.

If you would like more information about this abstract, please follow the link to http://nsosp.nso.edu/data/corona.html. This link was provided by the author. When you follow it, you will leave the Web site for this meeting; to return, you should use the Back comand on your browser.

The author(s) of this abstract have provided an email address for comments about the abstract: altrock@nso.edu

[Previous] | [Session 20] | [Next]

Bulletin of the American Astronomical Society, 36 #2
© YEAR. The American Astronomical Soceity.