FK Com Multi-wavelength Campaign

Details FK Com Multi-wavelength Campaign FK Com Multi-wavelength Campaign

Sep 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011head...12.1004k&link_type=abstract

American Astronomical Society, HEAD meeting #12, #10.04

Astronomy and Astrophysics

Astronomy

Scientific paper

FK Com (G5 III) is an ultrafast-rotating single yellow giant. It is the eponymous member of its class, and is suspected to have been a coalesced binary that has spun up. Here we present preliminary results from a multi-wavelength campaign we have carried out in April-May 2011. We observe the corona with X-rays with the high-resolution HETG spectrometer on Chandra, the corona and chromosphere FUV with HST/COS, and obtain surface magnetic information via Zeeman Doppler and Doppler Imaging with ground-based observations. The X-ray light curve exhibits significant variability, but unlike previous observations, is not dominated by large flares. The FUV lines show broad profiles, and considerable jitter.
This study has been supported by Chandra and HST grants.

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