| Thème(s) : |
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Physique/Astrophysique/Cosmologie et astrophysique extra-galactique
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| Titre : |
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The POINT-AGAPE Microlensing Survey: First Constraint on MACHOs towards M31 |
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| Auteur : |
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S. Paulin-Henriksson1, S. Calchi-Novati |
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| Laboratoire : |
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| Résumé : |
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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. |
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| Collaboration/Projet : |
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AGAPE |
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| Type de publication : |
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Communications sans actes |
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| Date de la présentation : |
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2004 |
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| Nom du colloque : |
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XXXIXth Rencontres de Moriond "Exploring the Universe" |
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| Ville du colloque : |
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La Thuile |
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| Pays du colloque : |
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Italie |
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| Date du colloque (début) : |
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28/03/2004 |
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| Date du colloque (fin) : |
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04/04/2004 |
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| Identifiant local : |
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PCC 04 46/Conf |
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| Commentaire : |
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The POINT-AGAPE Collaboration |
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