MOLECULAR GAS, AND STAR FORMATION IN GALAXIES: EMERGENT EMPIRICAL RELATIONS, FEEDBACK, AND THE EVOLUTION OF VERY GAS-RICH SYSTEMS
Padelis PAPADOPOULOS
Argelander Institut fur Astronomie - Bonn
Jeudi 11/02/2010, 14:00
Bat 709, salle 3 (salle Cassini, Rdc), CEA Saclay, Orme des Merisiers

I will present the fruition of a 3-year program to create realistic galaxy-sized models of stars and gas that include all ISM phases from first principles, as well as a star-formation process and criteria that realistically couples them to the stellar component.

An H2-regulated star formation process, along with the  inclusion of its CO-bright phase (not the same thing), allows a new feedback factor to be monitored (far-UV light from newborn stars) and a dynamical examination of the Schmidt-Kennicut empirical relations linking gas and star-formation in galaxies. We find robust examples of deviations, more likely to be encountered in gas-rich, Early-Universe galaxies. Such relations are thus a poor choice of subgrid physics of star formation in cosmological structure formation models.

Contact : Pascale CHAVEGRAND

 

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