The POINT-AGAPE Microlensing Survey: First Constraint on MACHOs towards M31

Abstract : To reveal the galactic dark matter in the form of MACHOs ("Massive Astrophysical Compact Halo Objects"), the POINT-AGAPE collaboration is carrying out a search for gravitational microlensing towards M31. A clear microlensing signal is detected. The high-threshold analysis of 3-year data leads to 7 bright and short microlensing candidates. The preliminary estimation of the detection efficiency implies that less than 25% (60%) of standard halos can be composed of objects with masses between 10^{-4} and 10^{-1} (10^{-1} and 1) solar mass at the 95% C.L. This result is compatible with previous microlensing results towards the Magellanic Clouds and gives the first constraints on MACHOs for a distant spiral galaxy.
Type de document :
Communication dans un congrès
XXXIXth Rencontres de Moriond "Exploring the Universe", Mar 2004, La Thuile, Italy. pp.1-4, 2004


http://hal.in2p3.fr/in2p3-00022282
Contributeur : Simone Lantz <>
Soumis le : mardi 12 octobre 2004 - 16:17:07
Dernière modification le : mardi 11 octobre 2016 - 13:27:33

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PCC | PSL | USPC

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S. Paulin-Henriksson, S. Calchi-Novati. The POINT-AGAPE Microlensing Survey: First Constraint on MACHOs towards M31. XXXIXth Rencontres de Moriond "Exploring the Universe", Mar 2004, La Thuile, Italy. pp.1-4, 2004. <in2p3-00022282>

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