Astronomy and Astrophysics – Astrophysics
Scientific paper
Aug 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006hrxs.confe..15h&link_type=abstract
High Resolution X-ray Spectroscopy: towards XEUS and Con-X, Proceedings of the international workshop held at the Mullard Space
Astronomy and Astrophysics
Astrophysics
Scientific paper
The geometric and thermal structure of coronae is a fundamental problem of the astrophysics of stellar activity. We can indirectly derive characteristic coronal extent using emission measures and densities as determined from plasma diagnostics. With the resolution of the Chandra HETGS, we can also begin to measure velocity variations. In conjunction with X-ray light curves, we can more directly constrain the structure of the emitting plasma. This is similar to optical Doppler image reconstruction which probes the lower atmosphere in detail, due to availability of much higher quality data. We will examine some results from HETGS spectroscopy of bright, short-period W UMa and RS CVn binaries, such as VW Cep, 44 Boo, and ER Vul.
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