Teach Astronomy - Signature of Microlensing скачать в хорошем качестве

Teach Astronomy - Signature of Microlensing

http://www.teachastronomy.com/ In general relativity the bending angle of light is independent of wavelength. This leads to a prediction of the nature of a microlensing event. It should be a non-repeating, symmetric rise and fall in the light curve of a star. This instantly distinguishes it from any type of variable star where the light variations depend on wavelength and where they are typically repeating or regular in nature. The fact that microlensing events do not recur means their incidence can only be studied in a statistical sense. The timescale of the microlensing event is a function of the mass of the intervening object. For typical substellar objects the timescale of a microlensing event is several days to about a week.