Quasar-microlensing versus star-microlensing evidence of small-planetary-mass objects as the dominant inner-halo galactic dark matter
| dc.creator | Gibson, Carl H. | |
| dc.creator | Schild, Rudolph E. | |
| dc.date | 1999-04-26 | |
| dc.date | 2000-04-26 | |
| dc.date.accessioned | 2026-07-07T02:31:24Z | |
| dc.date.available | 2026-07-07T02:31:24Z | |
| dc.description | 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 n_p distributions. Hence, star-microlensing searches that focus on a small fraction of the sky and assume a uniform distribution for n_p 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. | |
| dc.description | Resubmitted to ApJ, 36 pages, no figures | |
| dc.identifier | https://arxiv.org/abs/astro-ph/9904362 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/9904362 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/14139 | |
| dc.subject | Astrophysics | |
| dc.title | Quasar-microlensing versus star-microlensing evidence of small-planetary-mass objects as the dominant inner-halo galactic dark matter | |
| dc.type | text |