Coherent analysis of CMB anisotropies CMB, structures and Foregrounds Marian Douspis Nabila Aghanim, Mathieu Langer (IAS - Orsay) Douspis, Aghanim & Langer A&A, 2006

Power spectrum of temperature @ small scales compared to Observations Power spectrum of temperature anisotropies Power excess @ small scales compared to primary CMB

Micro-Waves Sky Primary Anisotropies (CMB) Secondary Anisotropies (SZ [Thermal]) Extra-galactic sources (IR, radio) Galactic Emissions Released data are “cleaned” from galactic and extra-galactic signal (resolved sources) 1st hypothesis: Excess = SZ effect

Previous works Fix cosmology (CP) with signal @ Choose a SZ spectrum (from one simulation) Add primary CMB and  £ SZ(n) Ampl.  given by fit of signal @ Deduce the SZ contribution @ (Bond et al., Goldstein et al., Kuo et al., Redhead et al., wmap3) Ignores the inherent link between SZ spectrum and cosmological parameters Need coherent analyse to estimate the SZ contrib.

Computation of the SZ spectrum SZ emission of a single cluster for a hot gas distribution in a NFW profile of DM Choose a mass function (Jenkins) to compute the cluster number counts on the sky (dn/dM) Integrate over the sky (Komatsu & Seljak) C.P. appear in the computation of the SZ spectrum

SZ Spectrum (WMAP 1st year)

SZ Contribution 1/2 degeneracies Need for a coherent analysis 8 high , n high degeneracies Need for a coherent analysis

SZ Contribution 2/2 1st coherent determination of the SZ contribution Any room for an additional contribution ?

Residual Point Sources In each experiment (@small scales) some contributions from unresolved point sources (IR/radio) with Flux  Detection threshold remain Model: (poissonian distribution) to be added to CMB+SZ spectra (Bi are new free parameters in the fit)

Residual point sources spectrum 1 contribution/spectrum of source by experiment

Point sources contribution 1/3 l<1500 l<10000 Including SZ and PS: Cosmology in agreement with concordance model obtained at large scales

Point sources contribution 2/3 SZ(150) ~ 5 % PS(acbar)~ 35% SZ(30) ~ 15 % PS(bima)~ 5% SZ(30) ~ 10 % PS(cbi) ~ 40% @l=2000

Contribution sources ponctuelles 3/3 Comparison with point sources studies? Agreement with: Toffolatti et al. If PS contribution supposed ?: cosmology OK

Conclusions Tools developped for a coherent approach of the CMB and LSS (Primary/secondaries/extragalactic sources) Determination of SZ and PS contributions as a function of for each experiment (s8, Bni ) Analysis needed for future data analysis (better error bars, intercalibration) Improvements needed as well (running, lensing, dependency in cluster f)

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