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OSUG - Terre Univers Environnement OSUG

Jeudi 17 Mars 2011

What regulates star-formation in galaxies ?

Nicolas Bouche
University of California, Santa Barbara
Jeudi 17 Mars - 11 h 00
Salle Manuel Forestini - IPAG

Globally, the efficiency to form galaxies is low, only 5% of the baryons made it into stars. Moreover, this efficiency is a strong function of mass, and peaks at around 20% for halos similar to the Milky Way. What causes this efficiency to decline in low mass galaxies ? Feedback is traditionally attributed to this for various reasons. We will address this issue from the point of view of the scaling relations. Indeed, galaxies form stars along a tight sequence, that evolves with redshift. We will discuss the roles of feedback and accretion on the global properties of galaxies.


Sous la tutelle de:

tutelles

Sous la tutelle de:

CNRS Université Grenoble Alpes