Parallactic variation of gravitational lensing and measurement of stellar mass

Details Parallactic variation of gravitational lensing and measurement of stellar mass Parallactic variation of gravitational lensing and measurement of stellar mass

Nov 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993a%26a...278l..27h&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 278, no. 2, p. L27-L30

Astronomy and Astrophysics

Astrophysics

21

Distance, Gravitational Lenses, Parallax, Stellar Mass, Angular Distribution, Astrometry, Interferometers, Kinematics, Relativity, Stellar Luminosity, Very Long Base Interferometry

Scientific paper

An application of the gravitational lensing is proposed for measuring the mass of a single star. It is shown that the mass and distance of a star are determined from the observation of parallactic variation of separation angles between the star and background point sources suffering the gravitational deflection by the star. In the case of annual parallax, this change will amount to the order of 10 micro-arc seconds for a star with 5 solar mass mass at a distance of 60 pc and background sources with an angular separation of 1 arc second from the star. This effect will be detectable in the near future by some observation plans now being developed.

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