Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001newar..45..395p&link_type=abstract
New Astronomy Reviews, Volume 45, Issue 4-5, p. 395-399.
Astronomy and Astrophysics
Astronomy
Scientific paper
The EROS2 experiment has completed the analysis of 2 years of SMC and LMCCCD data, covering a total area of ~40 square degrees on these targets. The combined EROS1 and EROS2 data, with a total of 9 years of intense monitoring of stars in the Magellanic Clouds, strongly limit the amount of compact objects in the Galactic halo, excluding in particular at the /95% CL that more than /40% of the standard halo be made of objects with a mass in the range [10-7Msolar, 1Msolar], or more than /10% for masses between 10-6Msolar and 10-2Msolar. The MACHO experiment analyzed 6 years of data on /~15 square degrees of the LMC. Their latest preferred value is 20% of the dark halo in the form of ~0.5 Msolar objects, a result consistent with the EROS limit. Analysis of the spatial distribution of LMC events, and comparison of LMC and SMC events in the near future should help discriminate between halo microlensing and other backgrounds like Magellanic Cloud self-lensing and unexpected variable stars.
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