Physics
Scientific paper
Jun 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aipc..841..582r&link_type=abstract
A CENTURY OF RELATIVITY PHYSICS: ERE 2005; XXVIII Spanish Relativity Meeting. AIP Conference Proceedings, Volume 841, pp. 582-5
Physics
Photography And Photometry, Luminosities, Magnitudes, Effective Temperatures, Colors, And Spectral Classification
Scientific paper
Einstein predicted that light from a distant ``source'' star would be deflected by the gravitational field of an intervening ``lens'' star: the phenomenon known as gravitational microlensing. The lens star produces magnified and distorted images of the source, and as the lens passes between the observer and the source, the magnification changes. For lens systems in our Galaxy, events occur on timescales of weeks to months.
Lens systems comprised of more than one object can produce complex light curves. Such light curves can be analysed to obtain information about both the lens and the source systems. These analyses include the detection of low-mass extra-solar planets and the limb-darkening characteristics of distant stars. In this paper, we present the results from one extreme microlensing event for which the limb-darkening of the 5 kpc distant source star was determined, as well as limits on the shape of the projected source star profile. The effective resolution of these measurements is approximately 0.04 microarcsec.
Bond Ian
Rattenbury Nicholas James
Yock Phil
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