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Microlensing towards the Magellanic Clouds and M31: is the quest for MACHOs still open?

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arxiv 1201.5262 v1 pith:QNV2REJJ submitted 2012-01-25 astro-ph.GA

S. Calchi Novati (Univ. Salerno , Italy , IIASS , Italy) This is my paper · ORCID
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keywords towardsmachosmassagreementanalysesanalysiscloudsdark
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Microlensing is the tool of choice for the search and the analysis of compact halo objects ("MACHOs"), a still viable class of dark matter candidates at the galactic scale. Different analyses point towards an agreement in excluding dark matter MACHOs of less than about 0.1 solar mass; it remains however an ongoing debate for values in the mass range (0.1-1) solar mass. The more robust constraints, though not all in agreement, come from the observational campaigns towards the Magellanic Clouds (the LMC and the SMC). The analyses towards the nearby galaxy of M31, in the so called "pixel lensing" regime, have expanded the perspectives in this field of research. In this contribution first we draw a critical view on recent results and then we focus on the pixel lensing analysis towards M31 of the PLAN collaboration.

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