Possible Implications of Sagittarius Type Dwarf Galaxy on Microlensing Towards the Large Magellanic Cloud

The discovery of the Sgr dwarf galaxy shows that the Galactic halo contains large clumps which are not full viralized. This may change implications of observed microlensing events towards the LMC. If more than one such systems are hidden in the Galactic halo, then given their enormous angular size, there is a significant chance for any line of sight, say the LMC direction, to intersect one of them. I use parameters of the Sgr dwarf galaxy to demonstrate that a foreground dwarf galaxy can provide much more micro-lenses than an isothermal dark halo of massive compact objects (MACHOs). As an alternative to the half-MACHO dark halo model, I discuss a model with lenses of the observed events being faint stars in a hidden Sgr-like disintegrated dwarf galaxy in the line-of-sight path to the LMC.