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Title: Microlensing and halo cold dark matter

Abstract

We discuss the implications of the more than 50 microlensing events seen for the composition of the dark halo of our galaxy. Though firm conclusions are not yet possible due to small-number statistics and modeling uncertainties, in most viable models of the galaxy the fraction of massive compact objects in the halo (MACHOs) is between 5% and 30%, consistent with expectations for a universe whose primary component is cold dark matter. An all-MACHO halo cannot yet be excluded; we discuss future measurements that could exclude this possibility.

Authors:
; ;  [1]
  1. Department of Astronomy and Astrophysics, Enrico Fermi Institute, The University of Chicago, Chicago, Illinois 60637-1433 (United States)|[NASA/Fermilab Astrophysics Center, Fermi National Accelerator Laboratory, Batavia, Illinois 60510-0500 (United States)|[Department of Physics, Enrico Fermi Institute, The University of Chicago, Chicago, Illinois 60637-1433 (United States)
Publication Date:
OSTI Identifier:
55259
Resource Type:
Journal Article
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 74; Journal Issue: 19; Other Information: PBD: 8 May 1995
Country of Publication:
United States
Language:
English
Subject:
66 PHYSICS; GALAXIES; LENSES; UNIVERSE; MAGELLANIC CLOUDS; MASS; DENSITY; DISTRIBUTION

Citation Formats

Gates, E.I., Gyuk, G., and Turner, M.S. Microlensing and halo cold dark matter. United States: N. p., 1995. Web. doi:10.1103/PhysRevLett.74.3724.
Gates, E.I., Gyuk, G., & Turner, M.S. Microlensing and halo cold dark matter. United States. doi:10.1103/PhysRevLett.74.3724.
Gates, E.I., Gyuk, G., and Turner, M.S. Mon . "Microlensing and halo cold dark matter". United States. doi:10.1103/PhysRevLett.74.3724.
@article{osti_55259,
title = {Microlensing and halo cold dark matter},
author = {Gates, E.I. and Gyuk, G. and Turner, M.S.},
abstractNote = {We discuss the implications of the more than 50 microlensing events seen for the composition of the dark halo of our galaxy. Though firm conclusions are not yet possible due to small-number statistics and modeling uncertainties, in most viable models of the galaxy the fraction of massive compact objects in the halo (MACHOs) is between 5% and 30%, consistent with expectations for a universe whose primary component is cold dark matter. An all-MACHO halo cannot yet be excluded; we discuss future measurements that could exclude this possibility.},
doi = {10.1103/PhysRevLett.74.3724},
journal = {Physical Review Letters},
number = 19,
volume = 74,
place = {United States},
year = {1995},
month = {5}
}