Physics
Scientific paper
Feb 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aipc.1094..608l&link_type=abstract
COOL STARS, STELLAR SYSTEMS AND THE SUN: Proceedings of the 15th Cambridge Workshop on Cool Stars, Stellar Systems and the Sun.
Physics
Flare Stars, Stellar Atmospheres, Radiative Transfer, Opacity And Line Formation, X-Ray Binaries
Scientific paper
We investigate the frequency and amplitude distribution of flares on the actice M dwarf CN Leo observed simultaneously in coronal X-rays, chromospheric line emission, and the photospheric optical continuum. We find that most of the larger events are visible in all atmospheric layers, these are equivalent to solar white light flares. Several smaller events are only visible in the chromospheric lines, which corresponds to solar H-alpha flares. One event is very strong in X-rays, but only weak in the chromospheric lines and invisible in the photospheric continuum, indicating a rather large scale height of the flaring loop. We find no obvious correlation of the flare amplitudes and decay times in the different atmospheric layers. We also search for time delays between the different wavelength bands and probe the occurrence of the Neupert effect.
Fuhrmeister Birgit
Liefke Carolin
Schmitt Jurgen H. M. M.
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