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Keywords

cosmology: theory
galaxies: evolution
galaxies: formation
Astrophysics - Cosmology and Extragalactic Astrophysics

How to Cite

Supernova Feedback and the Bend of the Tully-Fisher Relation. (2011). Revista Mexicana De Astrofísica Y Astronomía Serie De Conferencias, 40(1), 56-57. https://astronomia.unam.mx/journals/rmxac/article/view/2011rmxac..40...56d
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Abstract

We have studied the origin of the Tully-Fisher relation by analysing hydrodynamical simulations in a ΛCDM universe. We found that smaller galaxies exhibit lower stellar masses than those predicted by the linear fit to high mass galaxies (fast rotators), consistently with observations. In this model, these trends are generated by the more efficient action of supernova feedback in the regulation of the star formation in smaller galaxies. Without introducing scale-dependent parameters, the model predicts that the Tully-Fisher relation bends at a characteristic velocity of 100 km s^-{1}, in agreement with previous observational and theoretical findings.