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Paper detail

Weak Microlensing

A nearby star having a near-transit of a galaxy will cause a time-dependent weak lensing of the galaxy. Because the effect is small, we refer to this as weak microlensing. This could provide a useful method to weigh low-mass stars and brown dwarfs. We examine the feasibility of measuring masses in this way and we find that a star causes measurable weak microlensing in a galaxy even at 10 Einstein radii away. Of order one magnitude I < 25 galaxy comes close enough to one or other of the ~100 nearest stars per year.

preprint2009arXivOpen access
Jonathan ColesPrasenjit SahaHans Martin Schmid
astro-ph.IMastro-ph.SR
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Jonathan ColesPrasenjit SahaHans Martin Schmid

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