Can the variability of solar-like spotted stars be detected polarimetrically

Details Can the variability of solar-like spotted stars be detected polarimetrically Can the variability of solar-like spotted stars be detected polarimetrically

Mar 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995apj...441..408f&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 441, no. 1, p. 408-413

Astronomy and Astrophysics

Astrophysics

2

Polarization (Waves), Starspots, Stellar Magnitude, Stellar Models, Stellar Rotation, Astronomical Photometry, Astronomical Polarimetry, Doppler Effect, Eclipsing Binary Stars, Rayleigh Scattering

Scientific paper

A simple model is developed for the polarimetric variability expected due to a physically small starspot. Under the assumption that the spot cannot be detected photometrically, it is found that a positive polarimetric detection is possible at the 5 sigma level for stars brighter than fourth to seventh magnitude (depending upon the polarimetric system used), and provided that the stellar rotation period exceeds 8 days.

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