Evidence for gravitational microlensing by dark objects in the Galactic halo

Details Evidence for gravitational microlensing by dark objects in the Galactic halo Evidence for gravitational microlensing by dark objects in the Galactic halo

May 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994nuphs..35..137m&link_type=abstract

Nuclear Physics B Proceedings Supplements, Volume 35, p. 137-144.

Physics

Nuclear Physics

Scientific paper

The brightness of about 3 million stars in the Large Magellanic Cloud has been monitored for about three years by the EROS collaboration with the 1 m Schmidt telescope of ESO at La Silla (Chile). Two possible microlensing events have been detected, with time scales of about a month. If these are indeed microlensing phenomena, they correspond to masses of the dark lenses between a few hundredths and one half solar mass. The number of events observed is consistent with the number expected if the halo is dominated by objects with masses in this range. Another EROS programme using a CCD camera installed on a 40 cm telescope looks for low mass halo objects; no candidate event has been found in the 1991-1992 data.

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