INVESTIGADORES
DE ROSSI Maria Emilia
congresos y reuniones científicas
Título:
Supernova Feedback and the Bend of the Tully-Fisher Relation
Autor/es:
DE ROSSI, MARÍA EMILIA; TISSERA, PATRICIA BEATRIZ; PEDROSA, SUSANA ELIZABETH
Lugar:
Morelia, Michoacán, México
Reunión:
Congreso; XIII Latin American Regional IAU Meeting; 2010
Institución organizadora:
Unión Astronómica Internacional
Resumen:
We have studied the origin of the Tully-Fisher relation by analysing hydrodynamical simulations in a Lambda-CDM 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 around 100 km/s, in agreement with previous observational and theoretical findings.
