Galaxy evolution: Effects of stellar feedback on the dynamics of halo formation

Details Galaxy evolution: Effects of stellar feedback on the dynamics of halo formation Galaxy evolution: Effects of stellar feedback on the dynamics of halo formation

Dec 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003phdt........13m&link_type=abstract

Thesis (PhD). CLEMSON UNIVERSITY, Source DAI-B 64/06, p. 2715, Dec 2003, 149 pages.

Physics

3

Scientific paper

In this research project, we develop a model for the evolution of a cooling, contracting, galactic halo. The model assumes spherical symmetry and mimics the global hydrodynamic behavior while retaining local inhomogeneities. Using a time dependent gas density distribution in 3D space, we model the corresponding star formation rate with a Schmidt law. We incorporate three prescriptions for the star formation and subsequent supernova feedback to the system. We evolve each system for only 1.5 Gyrs to study the formation time of the galactic halo. With the models we are attempting to answer two questions: (1)Can we recreate the observed radial distribution of globular clusters and the lack of a gradient in age, assuming a homogeneous collapse in a rotating system? (2)How important is the prescription of star formation and feedback on the dynamics of the system?

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