Astronomy and Astrophysics – Astrophysics
Scientific paper
2002-01-09
Mon.Not.Roy.Astron.Soc. 335 (2002) 195
Astronomy and Astrophysics
Astrophysics
total 6 pages, including 7 figures and no table, MNRAS, submitted
Scientific paper
10.1046/j.1365-8711.2002.05609.x
We investigate the pattern of anomalies in the light curves of caustic-crossing binary microlensing events induced by spot(s) on the lensed source star. For this purpose, we perform simulations of events with various models of spots. From these simulations, we find that the spot-induced anomalies take various forms depending on the physical state of spots, which is characterized by the surface brightness contrast, the size, the number, the umbra/penumbra structure, the shape, and the orientation with respect to the sweeping caustic. We also examine the feasibility of distinguishing the two possibly degenerate types of anomalies caused by a spot and a transiting planet and find that the degeneracy in many cases can be broken from the characteristic multiple deviation feature in the spot-induced anomaly pattern caused by the multiplicity of spots.
Chang Heon-Young
Han Cheongho
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