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Long Term Variation of Solar Corona from SOHO/EIT Observations

Published online by Cambridge University Press:  14 March 2005

Jie Zhang  and
Mukul R. Kundu
Jie Zhang
Affiliation:
School of Computational Sciences, George Mason University, 4400 University Dr., Fairfax, VA 22030, USA email: jiez@scs.gmu.edu
Mukul R. Kundu
Affiliation:
Astronomy Department, University of Maryland, College Park, MD 20742
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Abstract

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We present the long term variation of solar corona based on SOHO/EIT observations from 1996 to 2004. EIT provides diagnostics of bulk corona in three channels with overlapping temperature range from 0.5 MK to 2.7 MK and with high spatial resolution. We find that the coronal emission measure increases by a factor of 4 from $2.0\times10^{27}$ cm$^{-5}$ at the solar minimum to $8.0\times10^{27}$ cm$^{-5}$ at the solar maximum. In the meantime, the overall temperature of the corona increases from 1.3 MK to 1.7 MKTo search for other articles by the author(s) go to: http://adsabs.harvard.edu/abstract_service.html

Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 2004 , Issue IAUS223 , June 2004 , pp. 157 - 160
Copyright
© 2004 International Astronomical Union