Detection of brown dwarfs by the micro-lensing of unresolved stars

Details Detection of brown dwarfs by the micro-lensing of unresolved stars Detection of brown dwarfs by the micro-lensing of unresolved stars

1992-11-04

arxiv.org/abs/astro-ph/9211002v1

Astron.Astrophys. 277 (1993) 1-9

Astronomy and Astrophysics

Astrophysics

14 p., LaTeX, 4 figures available on request, PAR-LPTHE 92 39/LPC 92 17

Scientific paper

The presence of brown dwarfs in the dark galactic halo could be detected
through their gravitational lensing effect and experiments under way monitor
about one million stars to observe a few lensing events per year. We show that
if the photon flux from a galaxy is measured with a good precision, it is not
necessary to resolve the stars and besides more events could be observed.

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