Spots on FK Com: active longitudes and "flip-flops"

Details Spots on FK Com: active longitudes and "flip-flops" Spots on FK Com: active longitudes and "flip-flops"

Jun 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004an....325..402k&link_type=abstract

Astronomische Nachrichten, Vol.325, Issue 5, p.402-407

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8

Stars: Activity, Stars: Imaging, Stars: Individual (Fk Com), Stars: Late-Type, Stars: Spots

Scientific paper

We have earlier investigated the surface structures of a late-type, single, giant FK Com for the years 1994-1998 using Doppler imaging. These surface temperature maps revealed long-lived active regions at high latitudes. Long-term photometric observations also show that these active regions tend to occur at two permanent active longitudes which are 180 degrees apart from each other, and that the activity switches the longitude with an average period of about 3 years (the "flip-flop" phenomenon). In this work we present new Doppler maps of FK Com obtained 1998-2003 and light-curve maps obtained 2002-2003. These new maps are investigated together with the earlier temperature maps and light-curve maps, with an aim of further studying the active longitudes, "flip-flop" phenomenon and surface differential rotation on FK Com.

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