Bibcode
Kashyap, Vinay; Ayres, T.; Korhonen, H.; Saar, S.; Drake, J.; Garcia-Alvarez, D.; Huenemoerder, D.
Referencia bibliográfica
American Astronomical Society, HEAD meeting #12, #10.04
Fecha de publicación:
9
2011
Número de citas
0
Número de citas referidas
0
Descripción
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.