Spot modelling of ζ andromedae

Zsolt Kővári, Katalin Oláh, János Bartus, Klaus G. Strassmeier, Thomas Granzer

Research output: Contribution to journalArticle

Abstract

The photometric light modulation of ζ Andromedae originates from the distorted geometry of the primary, and additionally, from spots of which parameters (temperature, size, location) are variable in time. We present spot modelling results for six two-colour light curves which show that spots preferably appear on the stellar surface towards the companion star and opposite to it, where the distortion also causes dimming. Therefore, simple fitting of the measured data for the ellipticity effect does not yield correct result. Instead, ellipticity calculated from exact stellar parameters should be removed from the data to get reliable spotted light curves.

Original languageEnglish
Pages (from-to)55-57
Number of pages3
JournalAstrophysics and Space Science
Volume304
Issue number1-4
DOIs
Publication statusPublished - Aug 2006

Keywords

  • Stars: Activity of
  • Stars: Imaging
  • Stars: individual: ζ Andromedae
  • Stars: late-type
  • Starspots

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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