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GLAST Lunch - Luigi Costamante
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GLAST Lunch - Gary Godfrey
| What | GLAST lunch |
|---|---|
| When |
10 May 07 from 12:05 pm to 01:00 pm |
| Where | FKB 3rd floor conf room |
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Measurement of the Neutrino Mass Using Galactic Clusters and MOND
 | Link to the talk |
Abstract:
Neutrinos are fermions and will fill up all the phase space states of a galactic cluster up to a momentum that is not contained by the cluster's potential well. Each neutrino has a mass, and all these bound neutrinos make an unseen dark matter in galactic clusters that will contribute to the total gravitational mass of the cluster.
MOND successfully predicts the dynamics of star clusters, dwarf galaxies, spiral galaxies, and ellipticals using only the baryonic mass that is observed. MOND has been perhaps incorrectly judged to have failed because it needs a small amount of dark matter to explain the dynamics of galactic clusters.
Because MOND has been so successful on other systems, it will be assumed that the dark matter it predicts in clusters is really there. Furthermore, it will be assumed that this dark matter consists of neutrinos. For each of 93 clusters the mass of the neutrino will be calculated that is necessary to explain the mass difference between the dynamically measured (using MOND) mass and the xray measured gas mass.
MASS: Doug Applegate