How Active is HD 79826? Characterizing a new short-period binary.

Details How Active is HD 79826? Characterizing a new short-period binary. How Active is HD 79826? Characterizing a new short-period binary.

Oct 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006xmm..prop...23h&link_type=abstract

XMM-Newton Proposal ID #05007701

Other

Stars, White Dwarfs, Solar System, Hd 79826, Xmm-Newton Proposal 05007701

Scientific paper

With the Chandra aspect system guide star camera, we have discovered new variable stars. One is HD 79826, a very short period (0.5d) active binary of the RS CVn type. It is important for probing stellar activity at the extreme limits of magnetic dynamo generation where X-ray luminosity saturation occurs. We will study the variability of line and continuum emission for two orbital periods to probe the geometric distribution and volume of emitting plasma, and relate to hypotheses for supersaturation which predict different behavior. We will characterize the coronal temperature distribution and elemental abundances through emission measure modeling. This very short period system may be an important case for comparison with other short period active systems.

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