Physics
Scientific paper
Jan 2012
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aas...21931101k&link_type=abstract
American Astronomical Society, AAS Meeting #219, #311.01
Physics
Scientific paper
The addition of baryonic physics to simulations of galaxy formation has been instrumental in producing realistic massive and Milky Way-analog disk galaxies that are bulgeless or only moderately bulged. Additionally, in recent simulations of dwarf galaxies, processes that remove or redistribute baryons during galaxy formation have been shown to alter the inner shape (triaxial to more spherical) and density structure (cuspy to more core-like) of dark matter halos. We compile observational properties of dark matter-dominated low surface brightness (LSB) galaxies to evaluate the plausibility that a previously higher baryonic mass content and feedback from star formation can modify the dark matter halos of these galaxies. We also compare the properties of bulgeless disk galaxies formed in recent simulations to the LSB galaxy sample. We find that observational constraints on LSB galaxy star formation histories, structure, and kinematics make it difficult for baryonic physics to sphericalize and decrease the central density of the dark matter halos of LSB galaxies.
Kuzio de Naray Rachel
Spekkens Kristine
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