EUV spectral observations of active region flares

Details EUV spectral observations of active region flares EUV spectral observations of active region flares

Dec 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002esasp.506..585d&link_type=abstract

In: Solar variability: from core to outer frontiers. The 10th European Solar Physics Meeting, 9 - 14 September 2002, Prague, Cze

Physics

2

Solar Corona, Spectroscopic Diagnostics

Scientific paper

We present EUV spectral observations of C-M class flares performed with the Coronal Diagnostic Spectrometer (CDS) onboard SOHO during the Cambridge active region (AR) campaigns in 1999 and 2001. With the CDS spectral data, complemented by other space observations (mainly TRACE, YOHKOH SXT), we investigate the physical properties of ARs, and study the development of small-scale flares. We discuss the importance of spectral observations in relation to the correct interpretation of broad band images. In particular, we present co-spatial simultaneous YOHKOH SXT and CDS flare observations and discuss the validity of the temperatures derived from the SXT filter ratios. In addition, we present sample results that can only be obtained with spectral data, such as measurements of densities, elemental abundances and post-flare flows, associated with slow chromospheric evaporation. All these results are important observational constraints for flare modeling.

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