The latitude distribution of star-spots on He 699

SV Jeffers, JR Barnes, Andrew Collier Cameron

Research output: Contribution to journalArticlepeer-review

22 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)pp.666-672.
Number of pages7
JournalMonthly Notices of the Royal Astronomical Society
Volume331
Issue number3
Publication statusPublished - 11 Apr 2002

Keywords

  • methods : data analysis
  • stars : activity
  • stars : imaging
  • stars : individual : He 699
  • stars : late-type
  • stars : spots
  • ALPHA-PERSEI CLUSTER
  • LOW-MASS STARS
  • ROTATIONAL VELOCITIES
  • MAIN-SEQUENCE
  • G-DWARFS
  • EVOLUTION
  • ALGORITHM
  • PLEIADES
  • IMAGES

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