Aurélie PÉNIN
(LAM)
The halo model, associated to a halo occupation distribution, is a powerful tool to reproduce clustering measurements. In the last decade, it has thus been widely used in its most simple form, the number of galaxies only depending on the halo mass. The advent of recent galaxies surveys enable the study of clustering as a function of the physical properties of galaxies (stellar mass, color, redshift, luminosity...). Such measurements require an evolution of the models of clustering, especially the introduction of a dependency on these physical properties.
I will describe a new framework where the halo occupation distribution depends on the specific star formation rate (the ratio of the star formation rate and the stellar mass) in addition to the halo mass. Thanks to state-of-the art measurements coming from UltraVista, I will show the usefulness of this kind of modeling.