Open AccessThe latitude distribution of star‐spots on He 699
Author(s) -
Jeffers S. V.,
Barnes J. R.,
Collier Cameron A.
Publication year - 2002
Publication title -
monthly notices of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.058
H-Index - 383
eISSN - 1365-2966
pISSN - 0035-8711
DOI - 10.1046/j.1365-8711.2002.05143.x
Subject(s) - physics , latitude , astrophysics , astronomy , polar , telescope , light curve
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.