The latitude distribution of star-spots on He 699

Details The latitude distribution of star-spots on He 699 The latitude distribution of star-spots on He 699

Apr 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002mnras.331..666j&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Volume 331, Issue 3, pp. 666-672.

Astronomy and Astrophysics

Astronomy

13

Methods: Data Analysis, Stars: Activity, Stars: Imaging, Stars: Individual: He 699, Stars: Late-Type, Stars: Spots

Scientific paper

In this paper, the latitude distribution of star-spots is analysed for the rapidly rotating G dwarf He 699. An image has been reconstructed from data taken with the William Herschel Telescope on La Palma on 2000 October 8. The predominant magnetic field structure is a decentred polar spot at high latitude, with smaller low-latitude features also present. This result is verified by independent reconstructions using even- and odd-numbered spectra. This work confirms and extends that of Barnes et al., and provides further evidence that there is a correlation between the presence of low-latitude features and the amplitude of the photometric light curve. It is also a further step in the search for activity cycles on young G dwarfs.

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