Quasar-microlensing versus star-microlensing evidence of small-planetary-mass objects as the dominant inner-halo galactic dark matter

Original · EN

We examine recent results of two kinds of microlensing experiments intended to detect galactic dark matter objects, and we suggest that the lack of short period star-microlensing events observed for stars near the Galaxy does not preclude either the ``rogue planets'' identified from quasar-microlensing by Schild 1996 as the missing-mass of a lens galaxy, or the clumps of such objects predicted by the new Gibson 1996-2000 hydro-gravitational theory as the inner-halo galactic dark matter. We point out that such micro-brown-dwarfs in nonlinear accretional cascades to form stars give intermittent lognormal number density nₚ distributions. Hence, star-microlensing searches that focus on a small fraction of the sky and assume a uniform distribution for nₚ are subject to undersampling errors. Sparse independent samples give modes smaller than means of the highly skewed lognormal distributions expected. Quasar-microlensing searches with higher optical depths are less affected by intermittency. We attempt to reconcile the results of the star-microlensing and quasar-microlensing studies. We conclude that star microlensing searches cannot exclude and are unlikely to even detect these objects so easily observed by quasar-microlensing and so robustly predicted by the new theory.