Gravitational Microlensing by the MACHOs of the LMC

Abstract

The expected microlensing events of the LMC by the MACHOs of the LMC itself are calculated and compared with analogue events by objects in the Galactic halo. The LMC matter distribution is modelled by a spherical halo and an exponential disk while a face-on exponential disk is used for the stellar distribution of the LMC. Among the microlensing events discovered by the MACHOs and EROS projects, a fraction of $22\%$ could be caused by the lenses near the center of the LMC or $13\%$ from lenses at $5^o$ from the LMC center. Therefore, any statistical study of these microlensing events must take the LMC lenses into account.

12 pages, 6 figures (not included) by fax, ApJ submitted, DAEC-OPM-93

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• Spectroscopy of MACHO 97-SMC-1: self-lensing within the SMC
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• Probing MACHOs by observation of M31 pixel lensing with the 1.5m Loiano telescope
• Contamination in the MACHO dataset and the puzzle of LMC Microlensing
• Photometric Confirmation of MACHO Large Magellanic Cloud Microlensing Events
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• M31 Pixel Lensing PLAN Campaign: MACHO Lensing and Self Lensing Signals
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• The Galactic Halo from Microlensing
• Identification of the Microlens in Event MACHO-LMC-20
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