Occultation and Microlensing

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Occultation and Microlensing

Post by owlice » Mon Nov 08, 2010 7:32 pm

[c]Occultation and Microlensing[/c][/b]
Abstract: Occultation and microlensing are different limits of the same phenomena of one body passing in front of another body. We derive a general exact analytic expression which describes both microlensing and occultation in the case of spherical bodies with a source of uniform brightness and a non-relativistic foreground body. We also compute numerically the case of a source with quadratic limb-darkening. In the limit that the gravitational deflection angle is comparable to the angular size of the foreground body, both microlensing and occultation occur as the objects align. Such events may be used to constrain the size ratio of the lens and source stars, the limb-darkening coefficients of the source star, and the surface gravity of the lens star (if the lens and source distances are known). Application of these results to microlensing during transits in binaries and giant-star microlensing are discussed. These results unify the microlensing and occultation limits and should be useful for rapid model fitting of microlensing, eclipse, and "microccultation" events.

Credit: Agol, Eric

Site: http://faculty.washington.edu/agol/microccult.html
http://adsabs.harvard.edu/abs/2002ApJ...579..430A

Bibcode: 2010ascl.soft11017A

Preferred citation method: http://adsabs.harvard.edu/abs/2002ApJ...579..430A

ID: ascl:1011.017
Last edited by Ada Coda on Sun Dec 10, 2017 9:45 am, edited 1 time in total.
Reason: Updated code entry.
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Re: Occultation and Microlensing

Post by owlice » Sun Aug 27, 2017 4:17 pm

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