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Article overview
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Experimental hints of Gravity in Large Extra Dimensions? | Steinn Sigurdsson
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10 Jul 2001 | Journal: | Int.J.Mod.Phys. D10 (2001) 781-784 | Subject: | astro-ph gr-qc | Affiliation: | Pennsylvania State University | Abstract: | Recent conjectures suggest the universe may have large extra dimensions, through which gravity propagates. This implies gross departures from Newton’s law of gravity at small length scales. Here I consider some implications for particle dynamics on scales comparable to the compactification radius, $R_c ltorder 1$ mm. During planet formation, coalescence of micron sized dust grains to planetesimals is a rate critical step. Blum et al (2000) found dust grain aggregates form low fractal dimension structures in microgravity, consistent with high angular momentum coalescence. I consider the effects of non-Newtonian gravity on dust aggregation on scales less than $R_c$ and show they naturally coalesce into low dimensional structures with high specific angular momentum. We infer $R_c approx 80$ microns. | Source: | arXiv, astro-ph/0107169 | Services: | Forum | Review | PDF | Favorites |
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