Astronomy and Astrophysics – Astrophysics
Scientific paper
Mar 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993a%26a...269..351l&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 269, no. 1-2, p. 351-354.
Astronomy and Astrophysics
Astrophysics
9
Light Curve, Stellar Activity, Stellar Rotation, Variable Stars, Fourier Analysis, Spaceborne Telescopes, Stellar Atmospheres
Scientific paper
A model for the simulation of light curves of single magnetically active spotted stars has been developed. Simulated light curves are qualitatively compared to observed ones and quantitatively analyzed by means of Fourier analysis. The time-variable light modulation induced by an evolving spot pattern on a differentially rotating star is studied in order to test the capability of the Fourier analysis, by the Scargle method, to extract information on differential rotation. Light curve precision of Delta F/F = 10 exp 5 - 10 exp 6, where F is the stellar flux, and uninterrupted time coverage of at least 2Pi/Delta Omega, where Omega is the angular velocity, prove adequate to detect differential rotation of the order of Delta Omega. Such a result shows the importance of dedicated long term observations by space-borne telescopes.
Lanza Antonino Francesco
Rodono' Marcello
Zappalà R. A.
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