An analytical model to demonstrate the reliability of reconstructed `active longitudes'.

Details An analytical model to demonstrate the reliability of reconstructed `active longitudes'. An analytical model to demonstrate the reliability of reconstructed `active longitudes'.

Feb 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aipc.1094..664j&link_type=abstract

COOL STARS, STELLAR SYSTEMS AND THE SUN: Proceedings of the 15th Cambridge Workshop on Cool Stars, Stellar Systems and the Sun.

Physics

1

Magnetic And Electric Fields, Polarization Of Starlight, Main-Sequence: Late-Type Stars, Stellar Atmospheres, Radiative Transfer, Opacity And Line Formation

Scientific paper

Photometric light curves show apparent spot concentrations separated by 180 degrees in longitude that are commonly referred to as `active longitudes'. These spot concentrations have been observed to change in strength resulting in the `flip-flop' effect. We use a simple analytical model to calculate the light curve of a star with an arbitrary spot pattern to show that `active longitudes' are a likely consequence of the limited information content contained in a light curve. We also show that the same effects apply to heavily spotted stars.

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