POSTER PAPER 6.02
Latitude Distribution of Star-spots on the G Dwarf He699
S.V.Jeffers, J.R.Barnes, A.C.Cameron
Institute: The University of St Andrews
Contact Email: svj1@st-and.ac.uk
Abstract:
We analyse the latitude distribution of star-spots on the rapidly rotating
G dwarf He699. An image was reconstructed from data taken with the
William Herschel Telescope on La Palma on 2000 October 08. The predominant
magnetic field structure is a decentred polar spot at high latitude, with
smaller low latitude features also present. This result was verified by
independent reconstructions using even numbered and odd numbered
spectra. This work confirms and extends that of Barnes et
al., (2001,MNRAS,326,1057) and provides further evidence that there is a
correlation between the presence of low latitude features and the amplitude
of the photometric lightcurve. It is also a further step in the search for
activity cycles on young G dwarfs.
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Manuscript submitted: 2001-Sep-06
"The Future of Cool-Star Astrophysics", 2003, Eds. A. Brown,
G. M. Harper, & T. R. Ayres.
Proceedings of 12th Cambridge Workshop on Cool Stars, Stellar Systems,
& The Sun,
© 2003 University of Colorado.