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PostPosted: Thu, 05-07-18, 22:02 GMT 
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Using microlensing to measure the mass of the nearest star to our solar system...

Zurlo et al. "The gravitational mass of Proxima Centauri measured with SPHERE from a microlensing event"
https://arxiv.org/abs/1807.01318

The measurement puts the mass at 0.150 solar masses with an error of around 40%. This is consistent with previous mass determinations, e.g. the one used in the discovery paper for the planet Proxima b which used a figure of 0.1221±0.0022 solar masses.


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PostPosted: Fri, 06-07-18, 14:19 GMT 
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The lensing method looks quite contrived, but it should work.

Fridger

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