Computer Science
Scientific paper
Aug 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006hrxs.confe...4b&link_type=abstract
High Resolution X-ray Spectroscopy: towards XEUS and Con-X, Proceedings of the international workshop held at the Mullard Space
Computer Science
Scientific paper
The complexity of magnetic fields on active stars inevitably leads to reconnection and flaring. Even on the relatively inactive Sun, magnetic reconnection events occur continuously and flares are frequent. On active binary stars the situation is even more dramatic; these stars have intense magnetic fields covering much of their surfaces and even their quiescent coronal emission is thousands of times stronger than that from the Sun. Huge, long duration (many hours) flare outbursts are frequent on RS CVn binaries. We analyse Chandra HETGS spectra and contemporaneous multi-wavelength data of the active binaries Sigma Gem (K1 III +?), Sigma2 CrB (F6 V + G0 V), and HR1099 (K1 IV + G5 V) to determine the temporal changes in coronal properties and to see if their coronal variability makes sense in terms of processes observed in the solar corona. Different types of flare behaviour are seen on each of the binaries. We are able to study flare rises and decays and to test whether such proxy paradigms as the radio - X-ray Neupert effect actually hold true.
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