SEARCH FOR VERY LOW MASS OBJECTS IN THE GALACTIC HALO

Details SEARCH FOR VERY LOW MASS OBJECTS IN THE GALACTIC HALO SEARCH FOR VERY LOW MASS OBJECTS IN THE GALACTIC HALO

1995-03-05

arxiv.org/abs/astro-ph/9503021v1

Astron.Astrophys.301:1,1995

Astronomy and Astrophysics

Astrophysics

to appear in Astronomy & Astrophysics (Accepted for publication in January 1995), 5 pages in uuencoded, compressed postscript,

Scientific paper

We present results from a search for gravitational microlensing of stars in the Large Magellanic Cloud by low mass objects in the Galactic Halo. The search uses the CCD light curves of about 82,000 stars with up to 46 measurements per night over a period of 10 months. No light curve exhibits a form that is consistent with a microlensing event of maximum amplification greater than 1.2. This null result makes it unlikely that the Halo is dominated by objects in the mass range $5 10^{-8}M_{\odot} < M <5 10^{-4}M_{\odot} $. keywords{Galaxy : Halo, kinematics and dynamics, stellar content -- Cosmology : dark matter, gravitational lensing}

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