Talk detail

Participant	Delabrouille, Jacques
Institution	Université Paris Diderot, Bâtiment Condorce - 10 rune A. Domon et L. Duquet - Paris - cedex 13 - France

Session	CB2	Accepted	Yes	Order	2	Time	14:50 - 15:20	25' + 5'
Talk	Oral abstract	Title	Component Separation: Constraining a Multicomponent Sky Model from Multifrequency Observations
Co-authors	the Planck collaboration
Abstract	Sky observations targeting the measurement of CMB intensity and polarisation anisotropies in fact contain a superposition of emission from several other astrophysical sources: the diffuse interstellar medium of our Galaxy; radiogalaxies and infrared galaxies; the Sunyaev Zeldovich effect from the hot intra-cluster electron gas in massive clusters of galaxies. Separating these components into contributions from distinct processes is crucial for the interpretation of the observations. In fact, it is likely that astrophysical confusion, rather than instrumental noise, will set the limit on the performance of upcoming CMB observations, such as those of the Planck space mission. For this reason, component separation is a very active topic of research, for which accurate predictions or realistic simulations of the sky emission are necessary. In this presentation, we will review the work done within the Planck collaboration to best address this component separation problem.