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Microlensing of Unresolved Stars as a Brown Dwarf Detection Method
Bouquet A., Kaplan J., Melchior A.-L., Giraud-Héraud Y., Baillon P.
Physique/Astrophysique/Cosmologie et astrophysique extra-galactique
Planète et Univers/Astrophysique
Microlensing of Unresolved Stars as a Brown Dwarf Detection Method
A. Bouquet1, J. Kaplan1, A.-L. Melchior1, Y. Giraud-Héraud2, P. Baillon3
1 :  LPTHE - Laboratoire de Physique Théorique et Hautes Energies
CNRS : UMR7589 – Université Pierre et Marie Curie (UPMC) - Paris VI – Université Paris VII - Paris Diderot
2 :  PCC - Physique Corpusculaire et Cosmologie - Collège de France
CNRS : UMR7553 – IN2P3 – Université Paris VII - Paris Diderot
11, place Marcelin Berthelot - 75231 Paris Cedex 05
3 :  CERN - European Organization for Nuclear Research
We describe a project of brown dwarf detection in the dark halo of a galaxy using the microlensing effect. We argue that monitoring pixels instead of stars could provide an enhancement in the number of detectable events. We estimate the detection efficiency with a Monte-Carlo simulation. We expect a ten-fold increase with respect to current experiments. To assess the feasibility of this method we have determined the photometric precision of a pixel by comparing several pictures of a same field in the LMC. To be published in the Proceeding of the workshop 'The dark side of the universe...', Roma, Juin 1993,


8 pages and 4 figures available by fax Latex 1

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