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Recherches d'astres sombres massifs du halo galactique par la technique des microlentilles gravitationnelles avec les caméras d'EROS-2

Abstract : The galactic dark matter problem stems from the study of the rotation curves of spiral galaxies. One hypothesis is that there is a halo surrounding each galaxy, comprised of massive compacts objects (machos) which could be detected indirectly by the gravitational microlensing effect. The present work deals with the analysis of 55 million stellar light curves in both Magellanic Clouds, observed for 6.7 years (June 1996 until February 2003) with the EROS-2 cameras. Two different studies have been conducted to search for objects between 10^(-4) and 1000 solar masses, complementary to the EROS former results that cover 10^(-7) to 10 solar masses. We do not find enough microlensing candidates to explain the galactic dark matter and we do not confirm the signal presented by the MACHO experiment.
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https://tel.archives-ouvertes.fr/tel-00008267
Contributor : Patrick Tisserand <>
Submitted on : Thursday, January 27, 2005 - 3:16:12 AM
Last modification on : Wednesday, January 31, 2018 - 12:10:28 PM
Long-term archiving on: : Friday, April 2, 2010 - 9:22:26 PM

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Patrick Tisserand. Recherches d'astres sombres massifs du halo galactique par la technique des microlentilles gravitationnelles avec les caméras d'EROS-2. Astrophysique [astro-ph]. Université Nice Sophia Antipolis, 2004. Français. ⟨tel-00008267⟩

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