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Physics Colloquium Announcement

Swenson College of Science and Engineering
University of Minnesota Duluth
Department of Physics
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The Light Side of Dark Matter

Dr. Sophia N. Cisneros

Visiting Scientist Laboratory for Nuclear Science
Massachusetts Institute of Technology


Monday, March 30, 2015
UMD Planetarium
3:00PM


Abstract:

The Luminous Convolution Model (LCM) is an empirical formula, based on a heuristic convolution of classical Relativity transformations, which makes it possible to predict 'flat' rotation curves for a broad class of spiral galaxies from the luminous matter alone. Since the LCM is independent of distance estimates or dark matter halo densities, it is the first model of its kind which constrains luminous matter modeling directly from the observed spectral shifts of characteristic photon emission/absorption lines. In this paper we present a sample of twenty-five (25) galaxies of varying morphologies and sizes. On average in this sample the LCM is more accurate than either Modified Newtonian Dynamics or dark matter models and returns physically reasonable mass to light ratios and exponential scale lengths. The question, while interesting, of if the LCM constrains the relation of the baryonic to dark matter is beyond the scope of the current work.  We will present an initial conjecture that the newly identified correlation between the LCM free parameter and the radial density of the baryonic mass may inform the dark energy density response to the galaxy mass distributions in the Hubble flow. 

Refreshments will be served

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