Finite - Size
نویسنده
چکیده
The nite size of a gravitational microlenses may have an eeect on the observed the am-pliication of a background point source. The mechanism is occlusion of one or more of the source images by the opaque bulk material of the lens travels by the source. To observe this phenomenon, the lensing geometry must be nely tuned so that the physical size of the lens is very near its Einstein radius. While this condition makes the probability of an occlusion event very low, if such an event is detected then the surface acceleration of the lens is constrained to within a geometrical factor related to the lens-observer distance. This information may provide a key to the identity of the lens.
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تاریخ انتشار 2007