Science Brought About by Highly Accurate Reference Frame: Parallactic Variation of Gravitational Lensing and Stellar Mass Measurement

Astronomy and Astrophysics – Astronomy

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Stellar Mass, Very Long Base Interferometry, Astrometry, Gravitational Lenses, Optical Measurement, Image Motion Compensation, Stellar Gravitation

Scientific paper

We showed that it is feasible to measure the mass of a single star by observing the variation of gravitational deflection caused by the orbital motion of the Earth. For stars within 60 pc with an appropriate background source within 1 arcsec, their mass can be measured by measuring the deflection shift with the accuracy of 10 micro arcsec. Feasibility of observing the image motion of the microlensing phenomena is also discussed.

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