Finite source effect on the polarization degree induced by a single microlens
arXiv:astro-ph/0508410 · doi:10.1111/j.1365-2966.2006.10366.x
Abstract
We investigate the effect of a single microlens on Stokes parameters. Semi-analytical formulae of the microlensed Stokes parameters are derived. The formulae not only reduce the double integrals in the estimations of those quantities but can also be approximated to a useful form in the bypass case. By using our formulation, we show that a combination of polarimetric data with photometric data enables us to estimate not only the finite source effect but also the direction of the microlens motion.
11 pages, 6 figures
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- Measuring Polarization in microlensing events
- Polarimetric microlensing of circumstellar disks
- Polarimetry microlensing of close-in planetary systems
- Polarization in caustic-crossing binary microlensing events
- Gaussian beams and caustic avoidance in gravitational optics
- Measuring the stellar atmosphere parameters using follow-up polarimetry microlensing observations